Commit f9d61ebb authored by Krzysztof Gogolewski's avatar Krzysztof Gogolewski Committed by Marge Bot

In hole fits, don't show VTA for inferred variables (#16456)

We fetch the ArgFlag for every argument by using splitForAllVarBndrs
instead of splitForAllTys in unwrapTypeVars.
parent a5b14ad4
Pipeline #6178 passed with stages
in 413 minutes and 49 seconds
......@@ -516,21 +516,30 @@ pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) hf = hang display 2 provenance
ty = hfType hf
matches = hfMatches hf
wrap = hfWrap hf
tyApp = sep $ map ((text "@" <>) . pprParendType) wrap
tyApp = sep $ zipWithEqual "pprHoleFit" pprArg vars wrap
where pprArg b arg = case binderArgFlag b of
Specified -> text "@" <> pprParendType arg
-- Do not print type application for inferred
-- variables (#16456)
Inferred -> empty
Required -> pprPanic "pprHoleFit: bad Required"
(ppr b <+> ppr arg)
tyAppVars = sep $ punctuate comma $
map (\(v,t) -> ppr v <+> text "~" <+> pprParendType t) $
zip vars wrap
zipWithEqual "pprHoleFit" (\v t -> ppr (binderVar v) <+>
text "~" <+> pprParendType t)
vars wrap
vars = unwrapTypeVars ty
where
vars = unwrapTypeVars ty
-- Attempts to get all the quantified type variables in a type,
-- e.g.
-- return :: forall (m :: * -> *) Monad m => (forall a . a) -> m a
-- return :: forall (m :: * -> *) Monad m => (forall a . a -> m a)
-- into [m, a]
unwrapTypeVars :: Type -> [TyVar]
unwrapTypeVars :: Type -> [TyCoVarBinder]
unwrapTypeVars t = vars ++ case splitFunTy_maybe unforalled of
Just (_, unfunned) -> unwrapTypeVars unfunned
_ -> []
where (vars, unforalled) = splitForAllTys t
where (vars, unforalled) = splitForAllVarBndrs t
holeVs = sep $ map (parens . (text "_" <+> dcolon <+>) . ppr) matches
holeDisp = if sMs then holeVs
else sep $ replicate (length matches) $ text "_"
......
......@@ -8,7 +8,7 @@ T14343.hs:10:9: error:
Valid hole fits include
test1 :: Proxy '[ 'True] (defined at T14343.hs:10:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @[Bool] @'[ 'True]
with Proxy @'[ 'True]
(defined at T14343.hs:8:16)
T14343.hs:11:9: error:
......@@ -20,7 +20,7 @@ T14343.hs:11:9: error:
Valid hole fits include
test2 :: Proxy '[ '[1]] (defined at T14343.hs:11:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @[[GHC.Types.Nat]] @'[ '[1]]
with Proxy @'[ '[1]]
(defined at T14343.hs:8:16)
T14343.hs:12:9: error:
......@@ -32,5 +32,5 @@ T14343.hs:12:9: error:
Valid hole fits include
test3 :: Proxy '[ '("Symbol", 1)] (defined at T14343.hs:12:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @[(GHC.Types.Symbol, GHC.Types.Nat)] @'[ '("Symbol", 1)]
with Proxy @'[ '("Symbol", 1)]
(defined at T14343.hs:8:16)
......@@ -8,7 +8,7 @@ T14343b.hs:10:9: error:
Valid hole fits include
test1 :: Proxy '( 'True, 'False) (defined at T14343b.hs:10:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @(Bool, Bool) @'( 'True, 'False)
with Proxy @'( 'True, 'False)
(defined at T14343b.hs:8:16)
T14343b.hs:11:9: error:
......@@ -23,7 +23,7 @@ T14343b.hs:11:9: error:
test2 :: Proxy '( '( 'True, 'False), 'False)
(defined at T14343b.hs:11:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @((Bool, Bool), Bool) @'( '( 'True, 'False), 'False)
with Proxy @'( '( 'True, 'False), 'False)
(defined at T14343b.hs:8:16)
T14343b.hs:12:9: error:
......@@ -35,5 +35,5 @@ T14343b.hs:12:9: error:
Valid hole fits include
test3 :: Proxy '( '[1], 'False) (defined at T14343b.hs:12:1)
Proxy :: forall k1 (k2 :: k1). Proxy k2
with Proxy @([GHC.Types.Nat], Bool) @'( '[1], 'False)
with Proxy @'( '[1], 'False)
(defined at T14343b.hs:8:16)
{-# LANGUAGE PolyKinds #-}
module T16456 where
data T p = MkT
foo :: T Int
foo = _
T16456.hs:7:7: error:
• Found hole: _ :: T Int
• In the expression: _
In an equation for ‘foo’: foo = _
• Relevant bindings include foo :: T Int (bound at T16456.hs:7:1)
Valid hole fits include
foo :: T Int (bound at T16456.hs:7:1)
MkT :: forall {k} (p :: k). T p
with MkT @Int
(defined at T16456.hs:4:12)
......@@ -514,5 +514,6 @@ test('T16255', normal, compile_fail, [''])
test('T16204c', normal, compile_fail, [''])
test('T16394', normal, compile_fail, [''])
test('T16414', normal, compile_fail, [''])
test('T16456', normal, compile_fail, ['-fprint-explicit-foralls'])
test('T16627', normal, compile_fail, [''])
test('T502', normal, compile_fail, [''])
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