Moduleservant-0.20.3.0Haskell2010

Servant.API.TypeErrors

This module defines the error messages used in type-level errors. Type-level errors can signal non-existing instances, for instance when a combinator is not applied to the correct number of arguments.

Synopsis

type PartialApplication
type NoInstanceFor
type NoInstanceForSub
type ErrorIfNoGeneric

Packageservant-0.20.3.0
Exports4
LanguageHaskell2010
LicenceBSD-3-Clause
SourceTypeErrors.hs

type

type PartialApplication (tycls :: k) (expr :: k') = NoInstanceForSub tycls expr ':$$: ((('ShowType expr ':<>: 'Text " expects ") ':<>: 'ShowType (Arity expr)) ':<>: 'Text " more arguments")

Source#

No instance exists for tycls (expr :> ...) because expr is not fully saturated.

typetype NoInstanceFor (expr :: k) = 'Text "There is no instance for " ':<>: 'ShowType expr

Source#

No instance exists for expr.

type

type NoInstanceForSub (tycls :: k) (expr :: k') = ((('Text "There is no instance for " ':<>: 'ShowType tycls) ':<>: 'Text " (") ':<>: 'ShowType expr) ':<>: 'Text " :> ...)"

Source#

No instance exists for tycls (expr :> ...) because expr is not recognised.

typetype ErrorIfNoGeneric (routes :: Type -> Type) = Break (NoGeneric routes) (Rep (routes ()))