| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Language.PureScript.Types
Description
Data types for types
- newtype SkolemScope = SkolemScope {}
- data Type
- = TUnknown Int
- | TypeVar String
- | TypeWildcard
- | TypeConstructor (Qualified (ProperName TypeName))
- | TypeOp (Qualified Ident)
- | TypeApp Type Type
- | ForAll String Type (Maybe SkolemScope)
- | ConstrainedType [Constraint] Type
- | Skolem String Int SkolemScope (Maybe SourceSpan)
- | REmpty
- | RCons String Type Type
- | KindedType Type Kind
- | PrettyPrintFunction Type Type
- | PrettyPrintObject Type
- | PrettyPrintForAll [String] Type
- | BinaryNoParensType Type Type Type
- | ParensInType Type
- type Constraint = (Qualified (ProperName ClassName), [Type])
- rowToList :: Type -> ([(String, Type)], Type)
- rowFromList :: ([(String, Type)], Type) -> Type
- isMonoType :: Type -> Bool
- mkForAll :: [String] -> Type -> Type
- replaceTypeVars :: String -> Type -> Type -> Type
- replaceAllTypeVars :: [(String, Type)] -> Type -> Type
- usedTypeVariables :: Type -> [String]
- freeTypeVariables :: Type -> [String]
- quantify :: Type -> Type
- moveQuantifiersToFront :: Type -> Type
- containsWildcards :: Type -> Bool
- everywhereOnTypes :: (Type -> Type) -> Type -> Type
- everywhereOnTypesTopDown :: (Type -> Type) -> Type -> Type
- everywhereOnTypesM :: Monad m => (Type -> m Type) -> Type -> m Type
- everywhereOnTypesTopDownM :: Monad m => (Type -> m Type) -> Type -> m Type
- everythingOnTypes :: (r -> r -> r) -> (Type -> r) -> Type -> r
- everythingWithContextOnTypes :: s -> r -> (r -> r -> r) -> (s -> Type -> (s, r)) -> Type -> r
Documentation
newtype SkolemScope Source
An identifier for the scope of a skolem variable
Constructors
| SkolemScope | |
Fields | |
The type of types
Constructors
| TUnknown Int | A unification variable of type Type |
| TypeVar String | A named type variable |
| TypeWildcard | A type wildcard, as would appear in a partial type synonym |
| TypeConstructor (Qualified (ProperName TypeName)) | A type constructor |
| TypeOp (Qualified Ident) | A type operator. This will be desugared into a type constructor during the "operators" phase of desugaring. |
| TypeApp Type Type | A type application |
| ForAll String Type (Maybe SkolemScope) | Forall quantifier |
| ConstrainedType [Constraint] Type | A type with a set of type class constraints |
| Skolem String Int SkolemScope (Maybe SourceSpan) | A skolem constant |
| REmpty | An empty row |
| RCons String Type Type | A non-empty row |
| KindedType Type Kind | A type with a kind annotation |
| PrettyPrintFunction Type Type | A placeholder used in pretty printing |
| PrettyPrintObject Type | A placeholder used in pretty printing |
| PrettyPrintForAll [String] Type | A placeholder used in pretty printing |
| BinaryNoParensType Type Type Type | Binary operator application. During the rebracketing phase of desugaring, this data constructor will be removed. |
| ParensInType Type | Explicit parentheses. During the rebracketing phase of desugaring, this data constructor will be removed. Note: although it seems this constructor is not used, it _is_ useful, since it prevents certain traversals from matching. |
type Constraint = (Qualified (ProperName ClassName), [Type]) Source
A typeclass constraint
rowToList :: Type -> ([(String, Type)], Type) Source
Convert a row to a list of pairs of labels and types
isMonoType :: Type -> Bool Source
Check whether a type is a monotype
replaceTypeVars :: String -> Type -> Type -> Type Source
Replace a type variable, taking into account variable shadowing
replaceAllTypeVars :: [(String, Type)] -> Type -> Type Source
Replace named type variables with types
usedTypeVariables :: Type -> [String] Source
Collect all type variables appearing in a type
freeTypeVariables :: Type -> [String] Source
Collect all free type variables appearing in a type
quantify :: Type -> Type Source
Universally quantify over all type variables appearing free in a type
moveQuantifiersToFront :: Type -> Type Source
Move all universal quantifiers to the front of a type
containsWildcards :: Type -> Bool Source
Check if a type contains wildcards
everythingOnTypes :: (r -> r -> r) -> (Type -> r) -> Type -> r Source
everythingWithContextOnTypes :: s -> r -> (r -> r -> r) -> (s -> Type -> (s, r)) -> Type -> r Source