Clippy fix

crates/polkavm/src/api.rs

@@ -1,6 +1,9 @@
-use alloc::borrow::{Cow, ToOwned};
+use alloc::borrow::Cow;
+#[cfg(not(feature = "std"))]
+use alloc::borrow::ToOwned;
 use alloc::format;
 use alloc::sync::Arc;
+#[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 
 #[cfg(not(feature = "std"))]
@@ -62,6 +65,7 @@ pub(crate) struct EngineState {
 }
 
 pub struct Engine {
+    #[allow(dead_code)]
     selected_backend: BackendKind,
     #[allow(dead_code)]
     selected_sandbox: Option<SandboxKind>,
@@ -1727,6 +1731,7 @@ pub(crate) struct ExecuteArgs<'a> {
     pub(crate) flags: u32,
     pub(crate) hostcall_handler: Option<HostcallHandler<'a>>,
     pub(crate) module: Option<&'a Module>,
+    #[allow(dead_code)]
     pub(crate) is_async: bool,
 }
 

crates/polkavm/src/caller.rs

@@ -2,6 +2,7 @@ use crate::api::BackendAccess;
 use crate::tracer::Tracer;
 use crate::Gas;
 use alloc::rc::{Rc, Weak};
+#[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 use core::mem::MaybeUninit;
 use polkavm_common::error::Trap;

crates/polkavm/src/config.rs

@@ -1,3 +1,4 @@
+#[cfg(feature = "std")]
 use crate::error::{bail, Error};
 
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]

crates/polkavm/src/error.rs

@@ -1,4 +1,5 @@
 use alloc::format;
+#[cfg(not(feature = "std"))]
 use alloc::string::{String, ToString};
 use polkavm_common::program::ProgramParseError;
 
@@ -73,6 +74,7 @@ impl Error {
     }
 
     #[cold]
+    #[allow(dead_code)]
     pub(crate) fn context(self, message: impl core::fmt::Display) -> Self {
         let string = match self.0 {
             ErrorKind::Owned(mut buffer) => {

crates/polkavm/src/gas.rs

@@ -15,6 +15,7 @@ impl GasVisitor {
     }
 
     #[inline]
+    #[allow(dead_code)]
     pub fn take_block_cost(&mut self) -> Option<u32> {
         self.last_block_cost.take()
     }

crates/polkavm/src/interpreter.rs

@@ -2,6 +2,7 @@ use crate::api::{BackendAccess, ExecuteArgs, HostcallHandler, MemoryAccessError,
 use crate::error::Error;
 use crate::utils::GuestInit;
 use crate::utils::{FlatMap, RegImm};
+#[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 use core::mem::MaybeUninit;
 use core::num::NonZeroU32;

crates/polkavm/src/tracer.rs

@@ -152,7 +152,7 @@ impl Tracer {
     fn trace_current_instruction_source(&mut self, program_counter: u32) {
         #[cfg(not(windows))]
         const VT_DARK: &str = "\x1B[1;30m";
-        #[cfg(not(windows))]
+        #[cfg(all(not(windows), feature = "std"))]
         const VT_GREEN: &str = "\x1B[1;32m";
         #[cfg(not(windows))]
         const VT_RESET: &str = "\x1B[0m";
@@ -258,10 +258,13 @@ impl Tracer {
         }
 
         self.current_source_location = location_ref;
-        let Some((path_offset, line)) = location_ref else {
+        #[cfg(feature = "std")]
+        let Some((path_offset, line)) = location_ref
+        else {
             return;
         };
 
+        #[cfg(feature = "std")]
         let Ok(path) = self.module.get_debug_string(path_offset) else {
             return;
         };

crates/polkavm/src/utils.rs

@@ -1,3 +1,4 @@
+#[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 use polkavm_common::program::RawReg;
 
@@ -54,6 +55,7 @@ where
     }
 
     #[inline]
+    #[allow(dead_code)]
     pub fn new_reusing_memory(mut memory: Self, capacity: u32) -> Self {
         memory.inner.clear();
         memory.inner.resize_with(capacity as usize, || None);
@@ -66,6 +68,7 @@ where
     }
 
     #[inline]
+    #[allow(dead_code)]
     pub fn len(&self) -> u32 {
         self.inner.len() as u32
     }
@@ -76,6 +79,7 @@ where
     }
 
     #[inline]
+    #[allow(dead_code)]
     pub fn clear(&mut self) {
         self.inner.clear();
     }