add DeepSubsumption and TypeData language extensions (ghc proposals 511 & 106) (#8493)

* add TypeData language extension (ghc proposal 106)

* changelog entry for PR 8493

* add TypeData to cabal.vim

* update MD5 hashes

* Update changelog.d/pr-8493

adjusted wording

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

* add DeepSubsumption as suggesterd by Artem Pelenitsyn

* update MD5sums

Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>

Cabal-syntax/src/Language/Haskell/Extension.hs

@@ -165,6 +165,11 @@ data KnownExtension =
   -- | Enable the dreaded monomorphism restriction.
   | MonomorphismRestriction
 
+  -- | Enable deep subsumption, relaxing the simple subsumption rules,
+  -- implicitly inserting eta-expansions when matching up function types
+  -- with different quantification structures.
+  | DeepSubsumption
+
   -- | Allow a specification attached to a multi-parameter type class
   -- which indicates that some parameters are entirely determined by
   -- others. The implementation will check that this property holds
@@ -499,6 +504,9 @@ data KnownExtension =
   -- | Enable datatype promotion.
   | DataKinds
 
+  -- | Enable @type data@ declarations, defining constructors at the type level.
+  | TypeData
+
   -- | Enable parallel arrays syntax (@[:@, @:]@) for /Data Parallel Haskell/.
   | ParallelArrays
 

Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs

@@ -27,9 +27,9 @@ tests = testGroup "Distribution.Utils.Structured"
     -- The difference is in encoding of newtypes
 #if MIN_VERSION_base(4,7,0)
     , testCase "GenericPackageDescription" $
-      md5Check (Proxy :: Proxy GenericPackageDescription) 0xaf3d4c667a8f019c98a45451419ad71c
+      md5Check (Proxy :: Proxy GenericPackageDescription) 0x227c04c63afe656449d6feb7220e5194
     , testCase "LocalBuildInfo" $
-      md5Check (Proxy :: Proxy LocalBuildInfo) 0x8ef5a39cb640e4340cf5c43a8300ff94
+      md5Check (Proxy :: Proxy LocalBuildInfo) 0x4ec3f95ae75fea8422b1c5e15724f1a4
 #endif
     ]
 

changelog.d/pr-8493

+synopsis: Add language extensions DeepSubsumption and TypeData
+packages: Cabal-syntax
+prs: #8493
+significance: significant
+
+description: {
+
+- adds support for the DeepSubsumption language extension (GHC proposal #511)
+- adds support for the TypeData language extension (GHC proposal #106)
+
+}

editors/vim/syntax/cabal.vim

@@ -160,6 +160,7 @@ syn keyword cabalExtension contained
   \ DataKinds
   \ DatatypeContexts
   \ DefaultSignatures
+  \ DeepSubsumption
   \ DeriveAnyClass
   \ DeriveDataTypeable
   \ DeriveFoldable
@@ -266,6 +267,7 @@ syn keyword cabalExtension contained
   \ TransformListComp
   \ TupleSections
   \ TypeApplications
+  \ TypeData
   \ TypeFamilies
   \ TypeFamilyDependencies
   \ TypeInType