Copyright | (C) 2011-2015 Edward Kmett, (C) 2015 Ørjan Johansen, |
---|---|
License | BSD-style (see the file LICENSE) |
Maintainer | Edward Kmett <ekmett@gmail.com> |
Stability | experimental |
Portability | non-portable |
Safe Haskell | Trustworthy |
Language | Haskell2010 |
This module uses a trick to provide quantification over constraints.
Documentation
type family Forall p :: Constraint Source
A representation of the quantified constraint forall a. p a
.
Forall p = Forall_ p |
type family ForallF p f :: Constraint Source
A representation of the quantified constraint forall a. p (f a)
.
ForallF p f = ForallF_ p f |
instF :: forall p f a. ForallF p f :- p (f a) Source
Instantiate a quantified
constraint at type ForallF
p fa
.
inst1 :: forall p f. Forall p :- p f Source
Instantiate a quantified constraint on kind * -> *
.
This is now redundant since
became polykinded.inst
type family ForallT p t :: Constraint Source
A representation of the quantified constraint forall f a. p (t f a)
.
ForallT p t = ForallT_ p t |