GHC.SourceGen.Type

This module provides combinators for constructing Haskell types.

Documentation

type HsType' = HsType GhcPs

A Haskell type, as it is represented after the parsing step.

Instances:

• BVar
• Var
• Par
• App
• HasTuple

tyPromotedVar :: RdrNameStr -> HsType'

A promoted name, for example from the DataKinds extension.

stringTy :: String -> HsType'

numTy :: Integer -> HsType'

listTy :: HsType' -> HsType'

listPromotedTy :: [HsType'] -> HsType'

tuplePromotedTy :: [HsType'] -> HsType'

(-->) :: HsType' -> HsType' -> HsType' infixr 0

A function type.

a -> b
=====
var "a" --> var "b"

forall' :: [HsTyVarBndr'] -> HsType' -> HsType'

A type variable binding.

forall a . T a
=====
forall' [bvar "a"] $ var "T" @@ var "a"

type HsTyVarBndr' = HsTyVarBndr GhcPs

A type variable binding, as it is represented after the parsing step.

Construct with either bVar (for regular type variables) or kindedVar (for kind signatures).

Instances:

• BVar

(==>) :: [HsType'] -> HsType' -> HsType' infixr 0

Qualify a type with constraints.

(F x, G x) => x
=====
[var "F" @@ var "x", var "G" @@ var "x"] ==> var "x"

kindedVar :: OccNameStr -> HsType' -> HsTyVarBndr'

A type variable with a kind signature.

x :: A
=====
kindedVar "x" (var "A")