From e0bbb978c65090b995d29bb876d1a00515f6bd36 Mon Sep 17 00:00:00 2001
From: Brandon Chinn <brandonchinn178@gmail.com>
Date: Sat, 3 Aug 2024 10:45:04 -0700
Subject: [PATCH] Add MultilineStrings extension

---
 Cabal-syntax/src/Language/Haskell/Extension.hs            | 2 ++
 .../tests/UnitTests/Distribution/Utils/Structured.hs      | 8 ++++----
 changelog.d/pr-10245                                      | 8 ++++++++
 editors/vim/syntax/cabal.vim                              | 1 +
 4 files changed, 15 insertions(+), 4 deletions(-)
 create mode 100644 changelog.d/pr-10245

diff --git a/Cabal-syntax/src/Language/Haskell/Extension.hs b/Cabal-syntax/src/Language/Haskell/Extension.hs
index 22082d6d0b3..13796c80666 100644
--- a/Cabal-syntax/src/Language/Haskell/Extension.hs
+++ b/Cabal-syntax/src/Language/Haskell/Extension.hs
@@ -551,6 +551,8 @@ data KnownExtension
   | -- | Allow the use of built-in syntax for list, tuple and sum type constructors
     -- rather than being exclusive to data constructors.
     ListTuplePuns
+  | -- | Support multiline strings
+    MultilineStrings
   deriving (Generic, Show, Read, Eq, Ord, Enum, Bounded, Typeable, Data)
 
 instance Binary KnownExtension
diff --git a/Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs b/Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs
index 40770290073..d932ef59a33 100644
--- a/Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs
+++ b/Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs
@@ -31,15 +31,15 @@ md5Check proxy md5Int = structureHash proxy @?= md5FromInteger md5Int
 md5CheckGenericPackageDescription :: Proxy GenericPackageDescription -> Assertion
 md5CheckGenericPackageDescription proxy = md5Check proxy
 #if MIN_VERSION_base(4,19,0)
-    0x3da8883a286b8fbfd9f94790d57cc06e
+    0x62ad178a75f041af29947c9b3d83e6ed
 #else
-    0x245e544da05f50f9dd0339a96ac99860
+    0xba8f0baa8074fd238ad36a309399349e
 #endif
 
 md5CheckLocalBuildInfo :: Proxy LocalBuildInfo -> Assertion
 md5CheckLocalBuildInfo proxy = md5Check proxy
 #if MIN_VERSION_base(4,19,0)
-    0x7683c2daece12ba7982e80f860454f47
+    0xc68e9c0758c4bf2d72fe82b3d55cee34
 #else
-    0xe694b39b10bc861f47ea9c7b926a422a
+    0xcf7e7bbcaec504d745fe086eec1786ff
 #endif
diff --git a/changelog.d/pr-10245 b/changelog.d/pr-10245
new file mode 100644
index 00000000000..2ed3690720a
--- /dev/null
+++ b/changelog.d/pr-10245
@@ -0,0 +1,8 @@
+synopsis: Add MultilineStrings extension
+packages: Cabal-syntax
+prs: #10245
+description: {
+
+- adds support for the `MultilineStrings` language extension (GHC proposal #637)
+
+}
diff --git a/editors/vim/syntax/cabal.vim b/editors/vim/syntax/cabal.vim
index d3374dbd27f..db08e8e0d92 100644
--- a/editors/vim/syntax/cabal.vim
+++ b/editors/vim/syntax/cabal.vim
@@ -219,6 +219,7 @@ syn keyword cabalExtension contained
   \ MonoLocalBinds
   \ MonoPatBinds
   \ MonomorphismRestriction
+  \ MultilineStrings
   \ MultiParamTypeClasses
   \ MultiWayIf
   \ NPlusKPatterns