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| author | Inari Listenmaa <inari.listenmaa@gmail.com> | 2024-09-09 19:43:39 +0200 |
|---|---|---|
| committer | Inari Listenmaa <inari.listenmaa@gmail.com> | 2025-08-02 16:39:31 +0200 |
| commit | b914a25de326dd937e3a1d05f4eefb46af6da7b4 (patch) | |
| tree | e816d5ec4b91425f3f7e41dd8bd75a2681ff524c /src/compiler/GF/Grammar | |
| parent | 1037b209ae225d5de604ff832d915c590ced4c38 (diff) | |
define return in terms of pure, >> as *>, mappend as <>
In preparation for deprecation, see https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid and https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
Diffstat (limited to 'src/compiler/GF/Grammar')
| -rw-r--r-- | src/compiler/GF/Grammar/Lexer.x | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/compiler/GF/Grammar/Lexer.x b/src/compiler/GF/Grammar/Lexer.x index b3d271ddd..248d091a1 100644 --- a/src/compiler/GF/Grammar/Lexer.x +++ b/src/compiler/GF/Grammar/Lexer.x @@ -283,11 +283,11 @@ instance Functor P where fmap = liftA instance Applicative P where - pure = return + pure a = a `seq` (P $ \s -> POk s a) (<*>) = ap instance Monad P where - return a = a `seq` (P $ \s -> POk s a) + return = pure (P m) >>= k = P $ \ s -> case m s of POk s a -> unP (k a) s PFailed posn err -> PFailed posn err |