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| author | Vladislav Zavialov <vlad.z.4096@gmail.com> | 2018-06-14 15:02:36 -0400 |
|---|---|---|
| committer | Richard Eisenberg <rae@cs.brynmawr.edu> | 2018-06-14 15:05:32 -0400 |
| commit | d650729f9a0f3b6aa5e6ef2d5fba337f6f70fa60 (patch) | |
| tree | ac224609397d4b7ca7072fc87739d2522be7675b /testsuite/tests/dependent/should_compile/T11719.hs | |
| parent | 4672e2ebf040feffde4e7e2d79c479e4c0c3efaf (diff) | |
| download | haskell-d650729f9a0f3b6aa5e6ef2d5fba337f6f70fa60.tar.gz | |
Embrace -XTypeInType, add -XStarIsType
Summary:
Implement the "Embrace Type :: Type" GHC proposal,
.../ghc-proposals/blob/master/proposals/0020-no-type-in-type.rst
GHC 8.0 included a major change to GHC's type system: the Type :: Type
axiom. Though casual users were protected from this by hiding its
features behind the -XTypeInType extension, all programs written in GHC
8+ have the axiom behind the scenes. In order to preserve backward
compatibility, various legacy features were left unchanged. For example,
with -XDataKinds but not -XTypeInType, GADTs could not be used in types.
Now these restrictions are lifted and -XTypeInType becomes a redundant
flag that will be eventually deprecated.
* Incorporate the features currently in -XTypeInType into the
-XPolyKinds and -XDataKinds extensions.
* Introduce a new extension -XStarIsType to control how to parse * in
code and whether to print it in error messages.
Test Plan: Validate
Reviewers: goldfire, hvr, bgamari, alanz, simonpj
Reviewed By: goldfire, simonpj
Subscribers: rwbarton, thomie, mpickering, carter
GHC Trac Issues: #15195
Differential Revision: https://phabricator.haskell.org/D4748
Diffstat (limited to 'testsuite/tests/dependent/should_compile/T11719.hs')
| -rw-r--r-- | testsuite/tests/dependent/should_compile/T11719.hs | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/testsuite/tests/dependent/should_compile/T11719.hs b/testsuite/tests/dependent/should_compile/T11719.hs index ba4d7c9db4..e4c2a89bf2 100644 --- a/testsuite/tests/dependent/should_compile/T11719.hs +++ b/testsuite/tests/dependent/should_compile/T11719.hs @@ -1,12 +1,12 @@ -{-# LANGUAGE RankNTypes, TypeFamilies, TypeInType, TypeOperators, +{-# LANGUAGE RankNTypes, TypeFamilies, TypeOperators, DataKinds, PolyKinds, UndecidableInstances #-} module T11719 where import Data.Kind -data TyFun :: * -> * -> * -type a ~> b = TyFun a b -> * +data TyFun :: Type -> Type -> Type +type a ~> b = TyFun a b -> Type type family (f :: a ~> b) @@ (x :: a) :: b |