From 0346253d522a1958ee632349387a610153b5a99d Mon Sep 17 00:00:00 2001 From: github-actions Date: Sun, 25 Aug 2024 00:49:12 +0000 Subject: [PATCH] Generated docs for shadow/shadow@296f430 --- docs/rust/either/enum.Either.html | 48 +++++++++---------- docs/rust/either/struct.IterEither.html | 2 +- docs/rust/either/trait.IntoEither.html | 2 +- docs/rust/search-index.js | 2 +- .../rust/search.desc/either/either-desc-0-.js | 2 +- .../constant.BUILD_TIMESTAMP.html | 2 +- .../rust/type.impl/core/result/enum.Result.js | 2 +- 7 files changed, 30 insertions(+), 30 deletions(-) diff --git a/docs/rust/either/enum.Either.html b/docs/rust/either/enum.Either.html index 4751f7a12eb..71f718391ab 100644 --- a/docs/rust/either/enum.Either.html +++ b/docs/rust/either/enum.Either.html @@ -471,35 +471,35 @@
§Examples

Trait Implementations§

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impl<L, R, Target> AsMut<[Target]> for Either<L, R>
where L: AsMut<[Target]>, - R: AsMut<[Target]>,

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fn as_mut(&mut self) -> &mut [Target]

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<CStr> for Either<L, R>
where + R: AsMut<[Target]>,

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fn as_mut(&mut self) -> &mut [Target]

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<CStr> for Either<L, R>
where L: AsMut<CStr>, R: AsMut<CStr>,

Requires crate feature use_std.

-
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fn as_mut(&mut self) -> &mut CStr

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<OsStr> for Either<L, R>
where +
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fn as_mut(&mut self) -> &mut CStr

Converts this type into a mutable reference of the (usually inferred) input type.

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impl<L, R> AsMut<OsStr> for Either<L, R>
where L: AsMut<OsStr>, R: AsMut<OsStr>,

Requires crate feature use_std.

-
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fn as_mut(&mut self) -> &mut OsStr

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<Path> for Either<L, R>
where +
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fn as_mut(&mut self) -> &mut OsStr

Converts this type into a mutable reference of the (usually inferred) input type.

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impl<L, R> AsMut<Path> for Either<L, R>
where L: AsMut<Path>, R: AsMut<Path>,

Requires crate feature use_std.

-
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fn as_mut(&mut self) -> &mut Path

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R, Target> AsMut<Target> for Either<L, R>
where +
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fn as_mut(&mut self) -> &mut Path

Converts this type into a mutable reference of the (usually inferred) input type.

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impl<L, R, Target> AsMut<Target> for Either<L, R>
where L: AsMut<Target>, - R: AsMut<Target>,

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fn as_mut(&mut self) -> &mut Target

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<str> for Either<L, R>
where + R: AsMut<Target>,

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fn as_mut(&mut self) -> &mut Target

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R> AsMut<str> for Either<L, R>
where L: AsMut<str>, - R: AsMut<str>,

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fn as_mut(&mut self) -> &mut str

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R, Target> AsRef<[Target]> for Either<L, R>
where + R: AsMut<str>,

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fn as_mut(&mut self) -> &mut str

Converts this type into a mutable reference of the (usually inferred) input type.
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impl<L, R, Target> AsRef<[Target]> for Either<L, R>
where L: AsRef<[Target]>, - R: AsRef<[Target]>,

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fn as_ref(&self) -> &[Target]

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R> AsRef<CStr> for Either<L, R>
where + R: AsRef<[Target]>,

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fn as_ref(&self) -> &[Target]

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R> AsRef<CStr> for Either<L, R>
where L: AsRef<CStr>, R: AsRef<CStr>,

Requires crate feature use_std.

-
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fn as_ref(&self) -> &CStr

Converts this type into a shared reference of the (usually inferred) input type.
source§

impl<L, R> AsRef<OsStr> for Either<L, R>
where +
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fn as_ref(&self) -> &CStr

Converts this type into a shared reference of the (usually inferred) input type.

source§

impl<L, R> AsRef<OsStr> for Either<L, R>
where L: AsRef<OsStr>, R: AsRef<OsStr>,

Requires crate feature use_std.

-
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fn as_ref(&self) -> &OsStr

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R> AsRef<Path> for Either<L, R>
where +
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fn as_ref(&self) -> &OsStr

Converts this type into a shared reference of the (usually inferred) input type.

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impl<L, R> AsRef<Path> for Either<L, R>
where L: AsRef<Path>, R: AsRef<Path>,

Requires crate feature use_std.

-
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fn as_ref(&self) -> &Path

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R, Target> AsRef<Target> for Either<L, R>
where +
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fn as_ref(&self) -> &Path

Converts this type into a shared reference of the (usually inferred) input type.

source§

impl<L, R, Target> AsRef<Target> for Either<L, R>
where L: AsRef<Target>, - R: AsRef<Target>,

source§

fn as_ref(&self) -> &Target

Converts this type into a shared reference of the (usually inferred) input type.
source§

impl<L, R> AsRef<str> for Either<L, R>
where + R: AsRef<Target>,

source§

fn as_ref(&self) -> &Target

Converts this type into a shared reference of the (usually inferred) input type.
source§

impl<L, R> AsRef<str> for Either<L, R>
where L: AsRef<str>, - R: AsRef<str>,

source§

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R> BufRead for Either<L, R>
where + R: AsRef<str>,

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fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.
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impl<L, R> BufRead for Either<L, R>
where L: BufRead, R: BufRead,

Requires crate feature "use_std"

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fn fill_buf(&mut self) -> Result<&[u8]>

Returns the contents of the internal buffer, filling it with more data @@ -560,7 +560,7 @@
§ExamplesResult<[Self::Item; N], IntoIter<Self::Item, N>>
where Self: Sized,
🔬This is a nightly-only experimental API. (iter_next_chunk)
Advances the iterator and returns an array containing the next N values. Read more
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fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>

🔬This is a nightly-only experimental API. (iter_advance_by)
Advances the iterator by n elements. Read more
1.28.0 · source§

fn step_by(self, step: usize) -> StepBy<Self>
where Self: Sized,

Creates an iterator starting at the same point, but stepping by -the given amount at each iteration. Read more
1.0.0 · source§

fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
where +the given amount at each iteration. Read more

1.0.0 · source§

fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
where Self: Sized, U: IntoIterator<Item = Self::Item>,

Takes two iterators and creates a new iterator over both in sequence. Read more
1.0.0 · source§

fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>
where Self: Sized, @@ -587,7 +587,7 @@
§ExamplesFnMut(&Self::Item) -> bool,

Creates an iterator that yields elements based on a predicate. Read more
1.57.0 · source§

fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
where Self: Sized, P: FnMut(Self::Item) -> Option<B>,

Creates an iterator that both yields elements based on a predicate and maps. Read more
1.0.0 · source§

fn skip(self, n: usize) -> Skip<Self>
where - Self: Sized,

Creates an iterator that skips the first n elements. Read more
1.0.0 · source§

fn take(self, n: usize) -> Take<Self>
where + Self: Sized,

Creates an iterator that skips the first n elements. Read more
1.0.0 · source§

fn take(self, n: usize) -> Take<Self>
where Self: Sized,

Creates an iterator that yields the first n elements, or fewer if the underlying iterator ends sooner. Read more
1.0.0 · source§

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F>
where Self: Sized, @@ -602,7 +602,7 @@
§ExamplesRead more

1.0.0 · source§

fn fuse(self) -> Fuse<Self>
where Self: Sized,

Creates an iterator which ends after the first None. Read more
1.0.0 · source§

fn inspect<F>(self, f: F) -> Inspect<Self, F>
where Self: Sized, - F: FnMut(&Self::Item),

Does something with each element of an iterator, passing the value on. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where + F: FnMut(&Self::Item),

Does something with each element of an iterator, passing the value on. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Borrows an iterator, rather than consuming it. Read more
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fn collect_into<E>(self, collection: &mut E) -> &mut E
where E: Extend<Self::Item>, Self: Sized,

🔬This is a nightly-only experimental API. (iter_collect_into)
Collects all the items from an iterator into a collection. Read more
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fn is_partitioned<P>(self, predicate: P) -> bool
where @@ -675,7 +675,7 @@
§ExamplesSized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,

🔬This is a nightly-only experimental API. (iter_order_by)
Lexicographically compares the elements of this Iterator with those -of another with respect to the specified comparison function. Read more
1.5.0 · source§

fn eq<I>(self, other: I) -> bool
where +of another with respect to the specified comparison function. Read more

1.5.0 · source§

fn eq<I>(self, other: I) -> bool
where I: IntoIterator, Self::Item: PartialEq<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are equal to those of @@ -683,7 +683,7 @@
§ExamplesSized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> bool,
🔬This is a nightly-only experimental API. (iter_order_by)
Determines if the elements of this Iterator are equal to those of -another with respect to the specified equality function. Read more
1.5.0 · source§

fn ne<I>(self, other: I) -> bool
where +another with respect to the specified equality function. Read more

1.5.0 · source§

fn ne<I>(self, other: I) -> bool
where I: IntoIterator, Self::Item: PartialEq<<I as IntoIterator>::Item>, Self: Sized,

Determines if the elements of this Iterator are not equal to those of @@ -712,8 +712,8 @@
§ExamplesRead more
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impl<L: Ord, R: Ord> Ord for Either<L, R>

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fn cmp(&self, other: &Either<L, R>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where - Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<L: PartialEq, R: PartialEq> PartialEq for Either<L, R>

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fn eq(&self, other: &Either<L, R>) -> bool

This method tests for self and other values to be equal, and is used -by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always + Self: Sized + PartialOrd,
Restrict a value to a certain interval. Read more
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impl<L: PartialEq, R: PartialEq> PartialEq for Either<L, R>

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fn eq(&self, other: &Either<L, R>) -> bool

This method tests for self and other values to be equal, and is used +by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<L: PartialOrd, R: PartialOrd> PartialOrd for Either<L, R>

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fn partial_cmp(&self, other: &Either<L, R>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<L, R> Read for Either<L, R>
where @@ -722,11 +722,11 @@
§ExamplesRequires crate feature "use_std"

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fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
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fn read_exact(&mut self, buf: &mut [u8]) -> Result<()>

Read the exact number of bytes required to fill buf. Read more
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>

Read all bytes until EOF in this source, placing them into buf. Read more
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fn read_to_string(&mut self, buf: &mut String) -> Result<usize>

Read all bytes until EOF in this source, appending them to buf. Read more
1.36.0 · source§

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers. Read more
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fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Reader has an efficient read_vectored -implementation. Read more
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fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Pull some bytes from this source into the specified buffer. Read more
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fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Read the exact number of bytes required to fill cursor. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where +implementation. Read more

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fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Pull some bytes from this source into the specified buffer. Read more
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fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Read the exact number of bytes required to fill cursor. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adaptor for this instance of Read. Read more
1.0.0 · source§

fn bytes(self) -> Bytes<Self>
where - Self: Sized,

Transforms this Read instance to an Iterator over its bytes. Read more
1.0.0 · source§

fn chain<R>(self, next: R) -> Chain<Self, R>
where + Self: Sized,

Transforms this Read instance to an Iterator over its bytes. Read more
1.0.0 · source§

fn chain<R>(self, next: R) -> Chain<Self, R>
where R: Read, - Self: Sized,

Creates an adapter which will chain this stream with another. Read more
1.0.0 · source§

fn take(self, limit: u64) -> Take<Self>
where + Self: Sized,

Creates an adapter which will chain this stream with another. Read more
1.0.0 · source§

fn take(self, limit: u64) -> Take<Self>
where Self: Sized,

Creates an adapter which will read at most limit bytes from it. Read more

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impl<L, R> Seek for Either<L, R>
where L: Seek, R: Seek,

Either<L, R> implements Seek if both L and R do.

@@ -738,7 +738,7 @@
§Examples
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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn write_all(&mut self, buf: &[u8]) -> Result<()>

Attempts to write an entire buffer into this writer. Read more
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.36.0 · source§

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored -implementation. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where +implementation. Read more

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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more
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impl<L: Copy, R: Copy> Copy for Either<L, R>

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impl<L: Eq, R: Eq> Eq for Either<L, R>

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impl<L, R> FusedIterator for Either<L, R>
where L: FusedIterator, R: FusedIterator<Item = L::Item>,

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impl<L, R> StructuralPartialEq for Either<L, R>

Auto Trait Implementations§

§

impl<L, R> Freeze for Either<L, R>
where @@ -774,4 +774,4 @@
§ExamplesClone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where - U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
\ No newline at end of file + U: TryFrom<T>,
§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
\ No newline at end of file diff --git a/docs/rust/either/struct.IterEither.html b/docs/rust/either/struct.IterEither.html index 5de55989291..85e5ef42ec3 100644 --- a/docs/rust/either/struct.IterEither.html +++ b/docs/rust/either/struct.IterEither.html @@ -214,4 +214,4 @@ I: Iterator,
§

type Item = <I as Iterator>::Item

The type of the elements being iterated over.
§

type IntoIter = I

Which kind of iterator are we turning this into?
source§

fn into_iter(self) -> I

Creates an iterator from a value. Read more
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impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where - U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
\ No newline at end of file + U: TryFrom<T>,
§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
\ No newline at end of file diff --git a/docs/rust/either/trait.IntoEither.html b/docs/rust/either/trait.IntoEither.html index 7d9de1a9340..6e0f43b4831 100644 --- a/docs/rust/either/trait.IntoEither.html +++ b/docs/rust/either/trait.IntoEither.html @@ -34,4 +34,4 @@
§Examples
let x = 0; assert_eq!(x.into_either_with(is_even), Left(x)); assert_eq!(x.into_either_with(|x| !is_even(x)), Right(x)); -

Object Safety§

This trait is not object safe.

Implementors§

source§

impl<T> IntoEither for T

\ No newline at end of file +

Object Safety§

This trait is not object safe.

Implementors§

source§

impl<T> IntoEither for T

\ No newline at end of file diff --git a/docs/rust/search-index.js b/docs/rust/search-index.js index 6d98b62fa1d..955c36e9e30 100644 --- a/docs/rust/search-index.js +++ b/docs/rust/search-index.js @@ -30,7 +30,7 @@ var searchIndex = new Map(JSON.parse('[\ 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diff --git a/docs/rust/search.desc/either/either-desc-0-.js b/docs/rust/search.desc/either/either-desc-0-.js index e95b5343d12..801be06ef27 100644 --- a/docs/rust/search.desc/either/either-desc-0-.js +++ b/docs/rust/search.desc/either/either-desc-0-.js @@ -1 +1 @@ -searchState.loadedDescShard("either", 0, "The enum Either with variants Left and Right is a general …\nThe enum Either with variants Left and Right is a general …\nProvides methods for converting a type Self into either a …\nIterator that maps left or right iterators to …\nA value of type L.\nA value of type R.\nConvert &mut Either<L, R> to Either<&mut L, &mut R>.\nConvert Pin<&mut Either<L, R>> to …\nConvert Pin<&Either<L, R>> to Either<Pin<&L>, Pin<&R>>, …\nConvert &Either<L, R> to Either<&L, &R>.\nMaps an Either<&mut L, &mut R> to an Either<L, R> by …\nMaps an Either<&L, &R> to an Either<L, R> by cloning the …\nMaps an Either<&L, &R> to an Either<L, R> by copying the …\nMaps an Either<&mut L, &mut R> to an Either<L, R> by …\nApply one of two functions depending on contents, unifying …\nConvert the contained value into T\nLike either, but provide some context to whichever of the …\nReturns the left value\nReturns the right value\nFactors out a homogenous type from an Either of Result.\nFactor out a homogeneous type from an either of pairs.\nConverts an Either of Iterators to be an Iterator of Either…\nBorrows an Either of Iterators to be an Iterator of Eithers\nMutably borrows an Either of Iterators to be an Iterator …\nFactors out None from an Either of Option.\nFactors out a homogenous type from an Either of Result.\nFactor out a homogeneous type from an either of pairs.\nConvert Either<L, R> to Either<R, L>.\nEvaluate the provided expression for both Either::Left and …\nReturns the argument unchanged.\nReturns the argument unchanged.\nCalls U::from(self).\nCalls U::from(self).\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nExtract the value of an either over two equivalent types.\nConvert the inner value to an iterator.\nReturn true if the value is the Left variant.\nReturn true if the value is the Right variant.\nBorrow the inner value as an iterator.\nMutably borrow the inner value as an iterator.\nConvert the left side of Either<L, R> to an Option<L>.\nApply the function f on the value in the Left variant if …\nReturn left value or given value\nReturn left or a default\nReturns left value or computes it from a closure\nMap f over the contained value and return the result in the\nApply the functions f and g to the Left and Right variants …\nSimilar to map_either, with an added context ctx …\nApply the function f on the value in the Left variant if …\nApply the function f on the value in the Right variant if …\nConvert the right side of Either<L, R> to an Option<R>.\nApply the function f on the value in the Right variant if …\nReturn right value or given value\nReturn right or a default\nReturns right value or computes it from a closure\nMacro for unwrapping the left side of an Either, which …\nDual to try_left!, see its documentation for more …\nReturns the left value\nReturns the right value") \ No newline at end of file +searchState.loadedDescShard("either", 0, "The enum Either with variants Left and Right is a general …\nThe enum Either with variants Left and Right is a general …\nProvides methods for converting a type Self into either a …\nIterator that maps left or right iterators to …\nA value of type L.\nA value of type R.\nConvert &mut Either<L, R> to Either<&mut L, &mut R>.\nConvert Pin<&mut Either<L, R>> to …\nConvert Pin<&Either<L, R>> to Either<Pin<&L>, Pin<&R>>, …\nConvert &Either<L, R> to Either<&L, &R>.\nMaps an Either<&L, &R> to an Either<L, R> by cloning the …\nMaps an Either<&mut L, &mut R> to an Either<L, R> by …\nMaps an Either<&L, &R> to an Either<L, R> by copying the …\nMaps an Either<&mut L, &mut R> to an Either<L, R> by …\nApply one of two functions depending on contents, unifying …\nConvert the contained value into T\nLike either, but provide some context to whichever of the …\nReturns the left value\nReturns the right value\nFactors out a homogenous type from an Either of Result.\nFactor out a homogeneous type from an either of pairs.\nConverts an Either of Iterators to be an Iterator of Either…\nBorrows an Either of Iterators to be an Iterator of Eithers\nMutably borrows an Either of Iterators to be an Iterator …\nFactors out None from an Either of Option.\nFactors out a homogenous type from an Either of Result.\nFactor out a homogeneous type from an either of pairs.\nConvert Either<L, R> to Either<R, L>.\nEvaluate the provided expression for both Either::Left and …\nReturns the argument unchanged.\nReturns the argument unchanged.\nCalls U::from(self).\nCalls U::from(self).\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nConverts self into a Left variant of Either<Self, Self> if …\nExtract the value of an either over two equivalent types.\nConvert the inner value to an iterator.\nReturn true if the value is the Left variant.\nReturn true if the value is the Right variant.\nBorrow the inner value as an iterator.\nMutably borrow the inner value as an iterator.\nConvert the left side of Either<L, R> to an Option<L>.\nApply the function f on the value in the Left variant if …\nReturn left value or given value\nReturn left or a default\nReturns left value or computes it from a closure\nMap f over the contained value and return the result in the\nApply the functions f and g to the Left and Right variants …\nSimilar to map_either, with an added context ctx …\nApply the function f on the value in the Left variant if …\nApply the function f on the value in the Right variant if …\nConvert the right side of Either<L, R> to an Option<R>.\nApply the function f on the value in the Right variant if …\nReturn right value or given value\nReturn right or a default\nReturns right value or computes it from a closure\nMacro for unwrapping the left side of an Either, which …\nDual to try_left!, see its documentation for more …\nReturns the left value\nReturns the right value") \ No newline at end of file diff --git a/docs/rust/shadow_build_info/constant.BUILD_TIMESTAMP.html b/docs/rust/shadow_build_info/constant.BUILD_TIMESTAMP.html index 6c4c957b4c5..c3e3efa78fb 100644 --- a/docs/rust/shadow_build_info/constant.BUILD_TIMESTAMP.html +++ b/docs/rust/shadow_build_info/constant.BUILD_TIMESTAMP.html @@ -1 +1 @@ -BUILD_TIMESTAMP in shadow_build_info - Rust

Constant shadow_build_info::BUILD_TIMESTAMP

source · 
pub const BUILD_TIMESTAMP: &str = "2024-08-24--00:42:04";
\ No newline at end of file +BUILD_TIMESTAMP in shadow_build_info - Rust

Constant shadow_build_info::BUILD_TIMESTAMP

source · 
pub const BUILD_TIMESTAMP: &str = "2024-08-25--00:46:52";
\ No newline at end of file diff --git a/docs/rust/type.impl/core/result/enum.Result.js b/docs/rust/type.impl/core/result/enum.Result.js index 88b95df10e6..454b76e43b1 100644 --- a/docs/rust/type.impl/core/result/enum.Result.js +++ b/docs/rust/type.impl/core/result/enum.Result.js @@ -1,7 +1,7 @@ (function() {var type_impls = { "anyhow":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","anyhow::Result"],["
source§

impl<T, E> Context<T, E> for Result<T, E>
where\n E: StdError + Send + Sync + 'static,

source§

fn context<C>(self, context: C) -> Result<T, Error>
where\n C: Display + Send + Sync + 'static,

Wrap the error value with additional context.
source§

fn with_context<C, F>(self, context: F) -> Result<T, Error>
where\n C: Display + Send + Sync + 'static,\n F: FnOnce() -> C,

Wrap the error value with additional context that is evaluated lazily\nonly once an error does occur.
","Context","anyhow::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","anyhow::Result"],["
source§

impl From<&StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From<&StreamResult>","anyhow::Result"],["
source§

impl From<StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From","anyhow::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","anyhow::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","anyhow::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","anyhow::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","anyhow::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","anyhow::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","anyhow::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","anyhow::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","anyhow::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","anyhow::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","anyhow::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"anyhow::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"anyhow::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"anyhow::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"anyhow::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"anyhow::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","anyhow::Result"],["
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","anyhow::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","anyhow::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","anyhow::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","anyhow::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","anyhow::Result"]], "clap":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","clap::error::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","clap::error::Result"],["
source§

impl From<&StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From<&StreamResult>","clap::error::Result"],["
source§

impl From<StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From","clap::error::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","clap::error::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap::error::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap::error::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","clap::error::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","clap::error::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","clap::error::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","clap::error::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","clap::error::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","clap::error::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","clap::error::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap::error::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap::error::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"clap::error::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"clap::error::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"clap::error::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","clap::error::Result"],["
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","clap::error::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","clap::error::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","clap::error::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","clap::error::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","clap::error::Result"]], -"clap_builder":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","clap_builder::error::Result"],["
source§

impl From<&StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From<&StreamResult>","clap_builder::error::Result"],["
source§

impl From<StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From","clap_builder::error::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","clap_builder::error::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap_builder::error::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","clap_builder::error::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","clap_builder::error::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","clap_builder::error::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"clap_builder::error::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","clap_builder::error::Result"],["
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","clap_builder::error::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","clap_builder::error::Result"]], +"clap_builder":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","clap_builder::error::Result"],["
source§

impl From<&StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: &StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From<&StreamResult>","clap_builder::error::Result"],["
source§

impl From<StreamResult> for Result<MZStatus, MZError>

source§

fn from(res: StreamResult) -> Result<MZStatus, MZError>

Converts to this type from the input type.
","From","clap_builder::error::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","clap_builder::error::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap_builder::error::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","clap_builder::error::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","clap_builder::error::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","clap_builder::error::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"clap_builder::error::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"clap_builder::error::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","clap_builder::error::Result"],["
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","clap_builder::error::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","clap_builder::error::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","clap_builder::error::Result"]], "gimli":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","gimli::read::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","gimli::read::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","gimli::read::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","gimli::read::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","gimli::read::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","gimli::read::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"gimli::read::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"gimli::read::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"gimli::read::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"gimli::read::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"gimli::read::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","gimli::read::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","gimli::read::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","gimli::read::Result"]], "lzma_rs":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","lzma_rs::error::Result"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","lzma_rs::error::Result"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","lzma_rs::error::Result"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","lzma_rs::error::Result"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","lzma_rs::error::Result"],["
source§

impl<T, E> Residual<T> for Result<Infallible, E>

§

type TryType = Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2_residual)
The “return” type of this meta-function.
","Residual","lzma_rs::error::Result"],["
source§

impl<T, E> Result<&T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let val = 12;\nlet x: Result<&i32, i32> = Ok(&val);\nassert_eq!(x, Ok(&12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"lzma_rs::error::Result"],["
source§

impl<T, E> Result<&mut T, E>

1.59.0 · source

pub fn copied(self) -> Result<T, E>
where\n T: Copy,

Maps a Result<&mut T, E> to a Result<T, E> by copying the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet copied = x.copied();\nassert_eq!(copied, Ok(12));
\n
1.59.0 · source

pub fn cloned(self) -> Result<T, E>
where\n T: Clone,

Maps a Result<&mut T, E> to a Result<T, E> by cloning the contents of the\nOk part.

\n
§Examples
\n
let mut val = 12;\nlet x: Result<&mut i32, i32> = Ok(&mut val);\nassert_eq!(x, Ok(&mut 12));\nlet cloned = x.cloned();\nassert_eq!(cloned, Ok(12));
\n
",0,"lzma_rs::error::Result"],["
source§

impl<T, E> Result<Option<T>, E>

1.33.0 (const: unstable) · source

pub fn transpose(self) -> Option<Result<T, E>>

Transposes a Result of an Option into an Option of a Result.

\n

Ok(None) will be mapped to None.\nOk(Some(_)) and Err(_) will be mapped to Some(Ok(_)) and Some(Err(_)).

\n
§Examples
\n
#[derive(Debug, Eq, PartialEq)]\nstruct SomeErr;\n\nlet x: Result<Option<i32>, SomeErr> = Ok(Some(5));\nlet y: Option<Result<i32, SomeErr>> = Some(Ok(5));\nassert_eq!(x.transpose(), y);
\n
",0,"lzma_rs::error::Result"],["
source§

impl<T, E> Result<Result<T, E>, E>

source

pub fn flatten(self) -> Result<T, E>

🔬This is a nightly-only experimental API. (result_flattening)

Converts from Result<Result<T, E>, E> to Result<T, E>

\n
§Examples
\n
#![feature(result_flattening)]\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Ok(\"hello\"));\nassert_eq!(Ok(\"hello\"), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Ok(Err(6));\nassert_eq!(Err(6), x.flatten());\n\nlet x: Result<Result<&'static str, u32>, u32> = Err(6);\nassert_eq!(Err(6), x.flatten());
\n

Flattening only removes one level of nesting at a time:

\n\n
#![feature(result_flattening)]\nlet x: Result<Result<Result<&'static str, u32>, u32>, u32> = Ok(Ok(Ok(\"hello\")));\nassert_eq!(Ok(Ok(\"hello\")), x.flatten());\nassert_eq!(Ok(\"hello\"), x.flatten().flatten());
\n
",0,"lzma_rs::error::Result"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"lzma_rs::error::Result"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","lzma_rs::error::Result"],["
1.61.0 · source§

impl<T, E> Termination for Result<T, E>
where\n T: Termination,\n E: Debug,

source§

fn report(self) -> ExitCode

Is called to get the representation of the value as status code.\nThis status code is returned to the operating system.
","Termination","lzma_rs::error::Result"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","lzma_rs::error::Result"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","lzma_rs::error::Result"]], "miniz_oxide":[["
1.0.0 · source§

impl<T, E> Clone for Result<T, E>
where\n T: Clone,\n E: Clone,

source§

fn clone(&self) -> Result<T, E>

Returns a copy of the value. Read more
source§

fn clone_from(&mut self, source: &Result<T, E>)

Performs copy-assignment from source. Read more
","Clone","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> Debug for Result<T, E>
where\n T: Debug,\n E: Debug,

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
","Debug","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<A, E, V> FromIterator<Result<A, E>> for Result<V, E>
where\n V: FromIterator<A>,

source§

fn from_iter<I>(iter: I) -> Result<V, E>
where\n I: IntoIterator<Item = Result<A, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err occur, a\ncontainer with the values of each Result is returned.

\n

Here is an example which increments every integer in a vector,\nchecking for overflow:

\n\n
let v = vec![1, 2];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_add(1).ok_or(\"Overflow!\")\n).collect();\nassert_eq!(res, Ok(vec![2, 3]));
\n

Here is another example that tries to subtract one from another list\nof integers, this time checking for underflow:

\n\n
let v = vec![1, 2, 0];\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32|\n    x.checked_sub(1).ok_or(\"Underflow!\")\n).collect();\nassert_eq!(res, Err(\"Underflow!\"));
\n

Here is a variation on the previous example, showing that no\nfurther elements are taken from iter after the first Err.

\n\n
let v = vec![3, 2, 1, 10];\nlet mut shared = 0;\nlet res: Result<Vec<u32>, &'static str> = v.iter().map(|x: &u32| {\n    shared += x;\n    x.checked_sub(2).ok_or(\"Underflow!\")\n}).collect();\nassert_eq!(res, Err(\"Underflow!\"));\nassert_eq!(shared, 6);
\n

Since the third element caused an underflow, no further elements were taken,\nso the final value of shared is 6 (= 3 + 2 + 1), not 16.

\n
","FromIterator>","miniz_oxide::MZResult"],["
source§

impl<T, E, F> FromResidual<Result<Infallible, E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(residual: Result<Infallible, E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","miniz_oxide::MZResult"],["
source§

impl<T, E, F> FromResidual<Yeet<E>> for Result<T, F>
where\n F: From<E>,

source§

fn from_residual(_: Yeet<E>) -> Result<T, F>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from a compatible Residual type. Read more
","FromResidual>","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> Hash for Result<T, E>
where\n T: Hash,\n E: Hash,

source§

fn hash<__H>(&self, state: &mut __H)
where\n __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where\n H: Hasher,\n Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
","Hash","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> IntoIterator for Result<T, E>

source§

fn into_iter(self) -> IntoIter<T>

Returns a consuming iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(5);\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, [5]);\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nlet v: Vec<u32> = x.into_iter().collect();\nassert_eq!(v, []);
\n
§

type Item = T

The type of the elements being iterated over.
§

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?
","IntoIterator","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> Ord for Result<T, E>
where\n T: Ord,\n E: Ord,

source§

fn cmp(&self, other: &Result<T, E>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where\n Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where\n Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
","Ord","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> PartialEq for Result<T, E>
where\n T: PartialEq,\n E: PartialEq,

source§

fn eq(&self, other: &Result<T, E>) -> bool

This method tests for self and other values to be equal, and is used\nby ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always\nsufficient, and should not be overridden without very good reason.
","PartialEq","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> PartialOrd for Result<T, E>
where\n T: PartialOrd,\n E: PartialOrd,

source§

fn partial_cmp(&self, other: &Result<T, E>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <=\noperator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >=\noperator. Read more
","PartialOrd","miniz_oxide::MZResult"],["
1.16.0 · source§

impl<T, U, E> Product<Result<U, E>> for Result<T, E>
where\n T: Product<U>,

source§

fn product<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the product of all elements is returned.

\n
§Examples
\n

This multiplies each number in a vector of strings,\nif a string could not be parsed the operation returns Err:

\n\n
let nums = vec![\"5\", \"10\", \"1\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert_eq!(total, Ok(100));\nlet nums = vec![\"5\", \"10\", \"one\", \"2\"];\nlet total: Result<usize, _> = nums.iter().map(|w| w.parse::<usize>()).product();\nassert!(total.is_err());
\n
","Product>","miniz_oxide::MZResult"],["
source§

impl<T, E> Result<T, E>

1.0.0 (const: 1.48.0) · source

pub const fn is_ok(&self) -> bool

Returns true if the result is Ok.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_ok(), true);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_ok(), false);
\n
1.70.0 · source

pub fn is_ok_and(self, f: impl FnOnce(T) -> bool) -> bool

Returns true if the result is Ok and the value inside of it matches a predicate.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.is_ok_and(|x| x > 1), true);\n\nlet x: Result<u32, &str> = Ok(0);\nassert_eq!(x.is_ok_and(|x| x > 1), false);\n\nlet x: Result<u32, &str> = Err(\"hey\");\nassert_eq!(x.is_ok_and(|x| x > 1), false);
\n
1.0.0 (const: 1.48.0) · source

pub const fn is_err(&self) -> bool

Returns true if the result is Err.

\n
§Examples
\n
let x: Result<i32, &str> = Ok(-3);\nassert_eq!(x.is_err(), false);\n\nlet x: Result<i32, &str> = Err(\"Some error message\");\nassert_eq!(x.is_err(), true);
\n
1.70.0 · source

pub fn is_err_and(self, f: impl FnOnce(E) -> bool) -> bool

Returns true if the result is Err and the value inside of it matches a predicate.

\n
§Examples
\n
use std::io::{Error, ErrorKind};\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), true);\n\nlet x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, \"!\"));\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);\n\nlet x: Result<u32, Error> = Ok(123);\nassert_eq!(x.is_err_and(|x| x.kind() == ErrorKind::NotFound), false);
\n
1.0.0 · source

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T>.

\n

Converts self into an Option<T>, consuming self,\nand discarding the error, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.ok(), Some(2));\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.ok(), None);
\n
1.0.0 · source

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E>.

\n

Converts self into an Option<E>, consuming self,\nand discarding the success value, if any.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.err(), None);\n\nlet x: Result<u32, &str> = Err(\"Nothing here\");\nassert_eq!(x.err(), Some(\"Nothing here\"));
\n
1.0.0 (const: 1.48.0) · source

pub const fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

\n

Produces a new Result, containing a reference\ninto the original, leaving the original in place.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.as_ref(), Ok(&2));\n\nlet x: Result<u32, &str> = Err(\"Error\");\nassert_eq!(x.as_ref(), Err(&\"Error\"));
\n
1.0.0 (const: unstable) · source

pub fn as_mut(&mut self) -> Result<&mut T, &mut E>

Converts from &mut Result<T, E> to Result<&mut T, &mut E>.

\n
§Examples
\n
fn mutate(r: &mut Result<i32, i32>) {\n    match r.as_mut() {\n        Ok(v) => *v = 42,\n        Err(e) => *e = 0,\n    }\n}\n\nlet mut x: Result<i32, i32> = Ok(2);\nmutate(&mut x);\nassert_eq!(x.unwrap(), 42);\n\nlet mut x: Result<i32, i32> = Err(13);\nmutate(&mut x);\nassert_eq!(x.unwrap_err(), 0);
\n
1.0.0 · source

pub fn map<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> U,

Maps a Result<T, E> to Result<U, E> by applying a function to a\ncontained Ok value, leaving an Err value untouched.

\n

This function can be used to compose the results of two functions.

\n
§Examples
\n

Print the numbers on each line of a string multiplied by two.

\n\n
let line = \"1\\n2\\n3\\n4\\n\";\n\nfor num in line.lines() {\n    match num.parse::<i32>().map(|i| i * 2) {\n        Ok(n) => println!(\"{n}\"),\n        Err(..) => {}\n    }\n}
\n
1.41.0 · source

pub fn map_or<U, F>(self, default: U, f: F) -> U
where\n F: FnOnce(T) -> U,

Returns the provided default (if Err), or\napplies a function to the contained value (if Ok).

\n

Arguments passed to map_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use map_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let x: Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or(42, |v| v.len()), 3);\n\nlet x: Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or(42, |v| v.len()), 42);
\n
1.41.0 · source

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
where\n D: FnOnce(E) -> U,\n F: FnOnce(T) -> U,

Maps a Result<T, E> to U by applying fallback function default to\na contained Err value, or function f to a contained Ok value.

\n

This function can be used to unpack a successful result\nwhile handling an error.

\n
§Examples
\n
let k = 21;\n\nlet x : Result<_, &str> = Ok(\"foo\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3);\n\nlet x : Result<&str, _> = Err(\"bar\");\nassert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42);
\n
1.0.0 · source

pub fn map_err<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> F,

Maps a Result<T, E> to Result<T, F> by applying a function to a\ncontained Err value, leaving an Ok value untouched.

\n

This function can be used to pass through a successful result while handling\nan error.

\n
§Examples
\n
fn stringify(x: u32) -> String { format!(\"error code: {x}\") }\n\nlet x: Result<u32, u32> = Ok(2);\nassert_eq!(x.map_err(stringify), Ok(2));\n\nlet x: Result<u32, u32> = Err(13);\nassert_eq!(x.map_err(stringify), Err(\"error code: 13\".to_string()));
\n
1.76.0 · source

pub fn inspect<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&T),

Calls a function with a reference to the contained value if Ok.

\n

Returns the original result.

\n
§Examples
\n
let x: u8 = \"4\"\n    .parse::<u8>()\n    .inspect(|x| println!(\"original: {x}\"))\n    .map(|x| x.pow(3))\n    .expect(\"failed to parse number\");
\n
1.76.0 · source

pub fn inspect_err<F>(self, f: F) -> Result<T, E>
where\n F: FnOnce(&E),

Calls a function with a reference to the contained value if Err.

\n

Returns the original result.

\n
§Examples
\n
use std::{fs, io};\n\nfn read() -> io::Result<String> {\n    fs::read_to_string(\"address.txt\")\n        .inspect_err(|e| eprintln!(\"failed to read file: {e}\"))\n}
\n
1.47.0 · source

pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>
where\n T: Deref,

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

\n

Coerces the Ok variant of the original Result via Deref\nand returns the new Result.

\n
§Examples
\n
let x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&str, &u32> = Ok(\"hello\");\nassert_eq!(x.as_deref(), y);\n\nlet x: Result<String, u32> = Err(42);\nlet y: Result<&str, &u32> = Err(&42);\nassert_eq!(x.as_deref(), y);
\n
1.47.0 · source

pub fn as_deref_mut(&mut self) -> Result<&mut <T as Deref>::Target, &mut E>
where\n T: DerefMut,

Converts from Result<T, E> (or &mut Result<T, E>) to Result<&mut <T as DerefMut>::Target, &mut E>.

\n

Coerces the Ok variant of the original Result via DerefMut\nand returns the new Result.

\n
§Examples
\n
let mut s = \"HELLO\".to_string();\nlet mut x: Result<String, u32> = Ok(\"hello\".to_string());\nlet y: Result<&mut str, &mut u32> = Ok(&mut s);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);\n\nlet mut i = 42;\nlet mut x: Result<String, u32> = Err(42);\nlet y: Result<&mut str, &mut u32> = Err(&mut i);\nassert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
\n
1.0.0 · source

pub fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(7);\nassert_eq!(x.iter().next(), Some(&7));\n\nlet x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter().next(), None);
\n
1.0.0 · source

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

\n

The iterator yields one value if the result is Result::Ok, otherwise none.

\n
§Examples
\n
let mut x: Result<u32, &str> = Ok(7);\nmatch x.iter_mut().next() {\n    Some(v) => *v = 40,\n    None => {},\n}\nassert_eq!(x, Ok(40));\n\nlet mut x: Result<u32, &str> = Err(\"nothing!\");\nassert_eq!(x.iter_mut().next(), None);
\n
1.4.0 · source

pub fn expect(self, msg: &str) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message including the\npassed message, and the content of the Err.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.expect(\"Testing expect\"); // panics with `Testing expect: emergency failure`
\n
§Recommended Message Style
\n

We recommend that expect messages are used to describe the reason you\nexpect the Result should be Ok.

\n\n
ⓘ
let path = std::env::var(\"IMPORTANT_PATH\")\n    .expect(\"env variable `IMPORTANT_PATH` should be set by `wrapper_script.sh`\");
\n

Hint: If you’re having trouble remembering how to phrase expect\nerror messages remember to focus on the word “should” as in “env\nvariable should be set by blah” or “the given binary should be available\nand executable by the current user”.

\n

For more detail on expect message styles and the reasoning behind our recommendation please\nrefer to the section on “Common Message\nStyles” in the\nstd::error module docs.

\n
1.0.0 · source

pub fn unwrap(self) -> T
where\n E: Debug,

Returns the contained Ok value, consuming the self value.

\n

Because this function may panic, its use is generally discouraged.\nInstead, prefer to use pattern matching and handle the Err\ncase explicitly, or call unwrap_or, unwrap_or_else, or\nunwrap_or_default.

\n
§Panics
\n

Panics if the value is an Err, with a panic message provided by the\nErr’s value.

\n
§Examples
\n

Basic usage:

\n\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(x.unwrap(), 2);
\n\n
ⓘ
let x: Result<u32, &str> = Err(\"emergency failure\");\nx.unwrap(); // panics with `emergency failure`
\n
1.16.0 · source

pub fn unwrap_or_default(self) -> T
where\n T: Default,

Returns the contained Ok value or a default

\n

Consumes the self argument then, if Ok, returns the contained\nvalue, otherwise if Err, returns the default value for that\ntype.

\n
§Examples
\n

Converts a string to an integer, turning poorly-formed strings\ninto 0 (the default value for integers). parse converts\na string to any other type that implements FromStr, returning an\nErr on error.

\n\n
let good_year_from_input = \"1909\";\nlet bad_year_from_input = \"190blarg\";\nlet good_year = good_year_from_input.parse().unwrap_or_default();\nlet bad_year = bad_year_from_input.parse().unwrap_or_default();\n\nassert_eq!(1909, good_year);\nassert_eq!(0, bad_year);
\n
1.17.0 · source

pub fn expect_err(self, msg: &str) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a panic message including the\npassed message, and the content of the Ok.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(10);\nx.expect_err(\"Testing expect_err\"); // panics with `Testing expect_err: 10`
\n
1.0.0 · source

pub fn unwrap_err(self) -> E
where\n T: Debug,

Returns the contained Err value, consuming the self value.

\n
§Panics
\n

Panics if the value is an Ok, with a custom panic message provided\nby the Ok’s value.

\n
§Examples
\n
ⓘ
let x: Result<u32, &str> = Ok(2);\nx.unwrap_err(); // panics with `2`
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(x.unwrap_err(), \"emergency failure\");
\n
source

pub fn into_ok(self) -> T
where\n E: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Ok value, but never panics.

\n

Unlike unwrap, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap as a maintainability safeguard that will fail\nto compile if the error type of the Result is later changed\nto an error that can actually occur.

\n
§Examples
\n
\nfn only_good_news() -> Result<String, !> {\n    Ok(\"this is fine\".into())\n}\n\nlet s: String = only_good_news().into_ok();\nprintln!(\"{s}\");
\n
source

pub fn into_err(self) -> E
where\n T: Into<!>,

🔬This is a nightly-only experimental API. (unwrap_infallible)

Returns the contained Err value, but never panics.

\n

Unlike unwrap_err, this method is known to never panic on the\nresult types it is implemented for. Therefore, it can be used\ninstead of unwrap_err as a maintainability safeguard that will fail\nto compile if the ok type of the Result is later changed\nto a type that can actually occur.

\n
§Examples
\n
\nfn only_bad_news() -> Result<!, String> {\n    Err(\"Oops, it failed\".into())\n}\n\nlet error: String = only_bad_news().into_err();\nprintln!(\"{error}\");
\n
1.0.0 · source

pub fn and<U>(self, res: Result<U, E>) -> Result<U, E>

Returns res if the result is Ok, otherwise returns the Err value of self.

\n

Arguments passed to and are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use and_then, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<&str, &str> = Ok(\"foo\");\nassert_eq!(x.and(y), Err(\"early error\"));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<&str, &str> = Err(\"late error\");\nassert_eq!(x.and(y), Err(\"not a 2\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<&str, &str> = Ok(\"different result type\");\nassert_eq!(x.and(y), Ok(\"different result type\"));
\n
1.0.0 · source

pub fn and_then<U, F>(self, op: F) -> Result<U, E>
where\n F: FnOnce(T) -> Result<U, E>,

Calls op if the result is Ok, otherwise returns the Err value of self.

\n

This function can be used for control flow based on Result values.

\n
§Examples
\n
fn sq_then_to_string(x: u32) -> Result<String, &'static str> {\n    x.checked_mul(x).map(|sq| sq.to_string()).ok_or(\"overflowed\")\n}\n\nassert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string()));\nassert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err(\"overflowed\"));\nassert_eq!(Err(\"not a number\").and_then(sq_then_to_string), Err(\"not a number\"));
\n

Often used to chain fallible operations that may return Err.

\n\n
use std::{io::ErrorKind, path::Path};\n\n// Note: on Windows \"/\" maps to \"C:\\\"\nlet root_modified_time = Path::new(\"/\").metadata().and_then(|md| md.modified());\nassert!(root_modified_time.is_ok());\n\nlet should_fail = Path::new(\"/bad/path\").metadata().and_then(|md| md.modified());\nassert!(should_fail.is_err());\nassert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound);
\n
1.0.0 · source

pub fn or<F>(self, res: Result<T, F>) -> Result<T, F>

Returns res if the result is Err, otherwise returns the Ok value of self.

\n

Arguments passed to or are eagerly evaluated; if you are passing the\nresult of a function call, it is recommended to use or_else, which is\nlazily evaluated.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"early error\");\nlet y: Result<u32, &str> = Ok(2);\nassert_eq!(x.or(y), Ok(2));\n\nlet x: Result<u32, &str> = Err(\"not a 2\");\nlet y: Result<u32, &str> = Err(\"late error\");\nassert_eq!(x.or(y), Err(\"late error\"));\n\nlet x: Result<u32, &str> = Ok(2);\nlet y: Result<u32, &str> = Ok(100);\nassert_eq!(x.or(y), Ok(2));
\n
1.0.0 · source

pub fn or_else<F, O>(self, op: O) -> Result<T, F>
where\n O: FnOnce(E) -> Result<T, F>,

Calls op if the result is Err, otherwise returns the Ok value of self.

\n

This function can be used for control flow based on result values.

\n
§Examples
\n
fn sq(x: u32) -> Result<u32, u32> { Ok(x * x) }\nfn err(x: u32) -> Result<u32, u32> { Err(x) }\n\nassert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2));\nassert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2));\nassert_eq!(Err(3).or_else(sq).or_else(err), Ok(9));\nassert_eq!(Err(3).or_else(err).or_else(err), Err(3));
\n
1.0.0 · source

pub fn unwrap_or(self, default: T) -> T

Returns the contained Ok value or a provided default.

\n

Arguments passed to unwrap_or are eagerly evaluated; if you are passing\nthe result of a function call, it is recommended to use unwrap_or_else,\nwhich is lazily evaluated.

\n
§Examples
\n
let default = 2;\nlet x: Result<u32, &str> = Ok(9);\nassert_eq!(x.unwrap_or(default), 9);\n\nlet x: Result<u32, &str> = Err(\"error\");\nassert_eq!(x.unwrap_or(default), default);
\n
1.0.0 · source

pub fn unwrap_or_else<F>(self, op: F) -> T
where\n F: FnOnce(E) -> T,

Returns the contained Ok value or computes it from a closure.

\n
§Examples
\n
fn count(x: &str) -> usize { x.len() }\n\nassert_eq!(Ok(2).unwrap_or_else(count), 2);\nassert_eq!(Err(\"foo\").unwrap_or_else(count), 3);
\n
1.58.0 · source

pub unsafe fn unwrap_unchecked(self) -> T

Returns the contained Ok value, consuming the self value,\nwithout checking that the value is not an Err.

\n
§Safety
\n

Calling this method on an Err is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nassert_eq!(unsafe { x.unwrap_unchecked() }, 2);
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nunsafe { x.unwrap_unchecked(); } // Undefined behavior!
\n
1.58.0 · source

pub unsafe fn unwrap_err_unchecked(self) -> E

Returns the contained Err value, consuming the self value,\nwithout checking that the value is not an Ok.

\n
§Safety
\n

Calling this method on an Ok is undefined behavior.

\n
§Examples
\n
let x: Result<u32, &str> = Ok(2);\nunsafe { x.unwrap_err_unchecked() }; // Undefined behavior!
\n\n
let x: Result<u32, &str> = Err(\"emergency failure\");\nassert_eq!(unsafe { x.unwrap_err_unchecked() }, \"emergency failure\");
\n
",0,"miniz_oxide::MZResult"],["
1.16.0 · source§

impl<T, U, E> Sum<Result<U, E>> for Result<T, E>
where\n T: Sum<U>,

source§

fn sum<I>(iter: I) -> Result<T, E>
where\n I: Iterator<Item = Result<U, E>>,

Takes each element in the Iterator: if it is an Err, no further\nelements are taken, and the Err is returned. Should no Err\noccur, the sum of all elements is returned.

\n
§Examples
\n

This sums up every integer in a vector, rejecting the sum if a negative\nelement is encountered:

\n\n
let f = |&x: &i32| if x < 0 { Err(\"Negative element found\") } else { Ok(x) };\nlet v = vec![1, 2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Ok(3));\nlet v = vec![1, -2];\nlet res: Result<i32, _> = v.iter().map(f).sum();\nassert_eq!(res, Err(\"Negative element found\"));
\n
","Sum>","miniz_oxide::MZResult"],["
source§

impl<T, E> Try for Result<T, E>

§

type Output = T

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value produced by ? when not short-circuiting.
§

type Residual = Result<Infallible, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
The type of the value passed to FromResidual::from_residual\nas part of ? when short-circuiting. Read more
source§

fn from_output(output: <Result<T, E> as Try>::Output) -> Result<T, E>

🔬This is a nightly-only experimental API. (try_trait_v2)
Constructs the type from its Output type. Read more
source§

fn branch(\n self,\n) -> ControlFlow<<Result<T, E> as Try>::Residual, <Result<T, E> as Try>::Output>

🔬This is a nightly-only experimental API. (try_trait_v2)
Used in ? to decide whether the operator should produce a value\n(because this returned ControlFlow::Continue)\nor propagate a value back to the caller\n(because this returned ControlFlow::Break). Read more
","Try","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> Copy for Result<T, E>
where\n T: Copy,\n E: Copy,

","Copy","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> Eq for Result<T, E>
where\n T: Eq,\n E: Eq,

","Eq","miniz_oxide::MZResult"],["
1.0.0 · source§

impl<T, E> StructuralPartialEq for Result<T, E>

","StructuralPartialEq","miniz_oxide::MZResult"]],