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| author | Ben Gamari <ben@smart-cactus.org> | 2019-10-06 15:42:53 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-10-08 05:12:58 -0400 |
| commit | e9813afceed61eb72e4c386fbc89b666c51805af (patch) | |
| tree | 68dc2de59fa1a7eaaa122959ef6fe70b4619a312 | |
| parent | 7cd54538e0fe5be8500335b2b10ed375b852edc2 (diff) | |
| download | haskell-e9813afceed61eb72e4c386fbc89b666c51805af.tar.gz | |
users-guide: Document -XHaskell98 and -XHaskell2010
| -rw-r--r-- | compiler/main/DynFlags.hs | 3 | ||||
| -rw-r--r-- | docs/users_guide/glasgow_exts.rst | 39 |
2 files changed, 42 insertions, 0 deletions
diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs index 146020887b..6176e2b155 100644 --- a/compiler/main/DynFlags.hs +++ b/compiler/main/DynFlags.hs @@ -2296,6 +2296,9 @@ flattenExtensionFlags ml = foldr f defaultExtensionFlags f (Off f) flags = EnumSet.delete f flags defaultExtensionFlags = EnumSet.fromList (languageExtensions ml) +-- | The language extensions implied by the various language variants. +-- When updating this be sure to update the flag documentation in +-- @docs/users-guide/glasgow_exts.rst@. languageExtensions :: Maybe Language -> [LangExt.Extension] languageExtensions Nothing diff --git a/docs/users_guide/glasgow_exts.rst b/docs/users_guide/glasgow_exts.rst index 372e0bd189..4323bee042 100644 --- a/docs/users_guide/glasgow_exts.rst +++ b/docs/users_guide/glasgow_exts.rst @@ -67,6 +67,45 @@ a large swath of the extensions supported by GHC at once. to move away from this portmanteau flag, and towards enabling features individually. + +.. extension:: Haskell2010 + :shortdesc: Use the Haskell 2010 language variant. + + Compile Haskell 2010 language variant. Enables the + following language extensions: + + .. hlist:: + + * :extension:`ImplicitPrelude` + * :extension:`StarIsType` + * :extension:`CUSKs` + * :extension:`MonomorphismRestriction` + * :extension:`DatatypeContexts` + * :extension:`TraditionalRecordSyntax` + * :extension:`EmptyDataDecls` + * :extension:`ForeignFunctionInterface` + * :extension:`PatternGuards` + * :extension:`DoAndIfThenElse` + * :extension:`RelaxedPolyRec` + + +.. extension:: Haskell98 + :shortdesc: Use the Haskell 2010 language variant. + + Compile using Haskell 98 language variant. Enables the + following language extensions: + + .. hlist:: + + * :extension:`ImplicitPrelude` + * :extension:`StarIsType` + * :extension:`CUSKs` + * :extension:`MonomorphismRestriction` + * :extension:`NPlusKPatterns` + * :extension:`DatatypeContexts` + * :extension:`TraditionalRecordSyntax` + * :extension:`NondecreasingIndentation` + .. _primitives: Unboxed types and primitive operations |