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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/determinism | |
| 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/determinism')
| -rw-r--r-- | testsuite/tests/determinism/determ004/determ004.hs | 2 | ||||
| -rw-r--r-- | testsuite/tests/determinism/determ014/A.hs | 6 |
2 files changed, 5 insertions, 3 deletions
diff --git a/testsuite/tests/determinism/determ004/determ004.hs b/testsuite/tests/determinism/determ004/determ004.hs index 756075031d..1361d76a0e 100644 --- a/testsuite/tests/determinism/determ004/determ004.hs +++ b/testsuite/tests/determinism/determ004/determ004.hs @@ -1,4 +1,4 @@ -{-# LANGUAGE TypeOperators +{-# LANGUAGE TypeOperators, StarIsType , DataKinds , PolyKinds , TypeFamilies diff --git a/testsuite/tests/determinism/determ014/A.hs b/testsuite/tests/determinism/determ014/A.hs index fb7a538ebd..35ea20f225 100644 --- a/testsuite/tests/determinism/determ014/A.hs +++ b/testsuite/tests/determinism/determ014/A.hs @@ -11,6 +11,8 @@ module KeyValue where +import Data.Kind + data AccValidation err a = AccFailure err | AccSuccess a data KeyValueError = MissingValue @@ -23,11 +25,11 @@ missing = rpure missingField missingField :: forall x. (WithKeyValueError :. f) x missingField = Compose $ AccFailure [MissingValue] -data Rec :: (u -> *) -> [u] -> * where +data Rec :: (u -> Type) -> [u] -> Type where RNil :: Rec f '[] (:&) :: !(f r) -> !(Rec f rs) -> Rec f (r ': rs) -newtype Compose (f :: l -> *) (g :: k -> l) (x :: k) +newtype Compose (f :: l -> Type) (g :: k -> l) (x :: k) = Compose { getCompose :: f (g x) } type (:.) f g = Compose f g |