diff options
Diffstat (limited to 'libraries/template-haskell/Language/Haskell/TH/Syntax.hs')
| -rw-r--r-- | libraries/template-haskell/Language/Haskell/TH/Syntax.hs | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/libraries/template-haskell/Language/Haskell/TH/Syntax.hs b/libraries/template-haskell/Language/Haskell/TH/Syntax.hs index ef44a5cbf3..770fac7580 100644 --- a/libraries/template-haskell/Language/Haskell/TH/Syntax.hs +++ b/libraries/template-haskell/Language/Haskell/TH/Syntax.hs @@ -1727,24 +1727,20 @@ data Dec (Maybe Kind) -- ^ @{ data family T a b c :: * }@ - | DataInstD Cxt Name - (Maybe [TyVarBndr]) -- Quantified type vars - [Type] + | DataInstD Cxt (Maybe [TyVarBndr]) Type (Maybe Kind) -- Kind signature [Con] [DerivClause] -- ^ @{ data instance Cxt x => T [x] -- = A x | B (T x) -- deriving (Z,W) -- deriving stock Eq }@ - | NewtypeInstD Cxt Name - (Maybe [TyVarBndr]) -- Quantified type vars - [Type] + | NewtypeInstD Cxt (Maybe [TyVarBndr]) Type -- Quantified type vars (Maybe Kind) -- Kind signature Con [DerivClause] -- ^ @{ newtype instance Cxt x => T [x] -- = A (B x) -- deriving (Z,W) -- deriving stock Eq }@ - | TySynInstD Name TySynEqn -- ^ @{ type instance ... }@ + | TySynInstD TySynEqn -- ^ @{ type instance ... }@ -- | open type families (may also appear in [Dec] of 'ClassD' and 'InstanceD') | OpenTypeFamilyD TypeFamilyHead @@ -1855,9 +1851,23 @@ data TypeFamilyHead = deriving( Show, Eq, Ord, Data, Generic ) -- | One equation of a type family instance or closed type family. The --- arguments are the left-hand-side type patterns and the right-hand-side --- result. -data TySynEqn = TySynEqn (Maybe [TyVarBndr]) [Type] Type +-- arguments are the left-hand-side type and the right-hand-side result. +-- +-- For instance, if you had the following type family: +-- +-- @ +-- type family Foo (a :: k) :: k where +-- forall k (a :: k). Foo \@k a = a +-- @ +-- +-- The @Foo \@k a = a@ equation would be represented as follows: +-- +-- @ +-- 'TySynEqn' ('Just' ['PlainTV' k, 'KindedTV' a ('VarT' k)]) +-- ('AppT' ('AppKindT' ('ConT' ''Foo) ('VarT' k)) ('VarT' a)) +-- ('VarT' a) +-- @ +data TySynEqn = TySynEqn (Maybe [TyVarBndr]) Type Type deriving( Show, Eq, Ord, Data, Generic ) data FunDep = FunDep [Name] [Name] @@ -2037,6 +2047,7 @@ data PatSynArgs data Type = ForallT [TyVarBndr] Cxt Type -- ^ @forall \<vars\>. \<ctxt\> => \<type\>@ | AppT Type Type -- ^ @T a b@ + | AppKindT Type Kind -- ^ @T \@k t@ | SigT Type Kind -- ^ @t :: k@ | VarT Name -- ^ @a@ | ConT Name -- ^ @T@ |