| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Servant.API.TypeErrors
Description
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 (tycls :: k) (expr :: k') = NoInstanceForSub tycls expr ':$$: ((('ShowType expr ':<>: 'Text " expects ") ':<>: 'ShowType (Arity expr)) ':<>: 'Text " more arguments")
- type NoInstanceFor (expr :: k) = 'Text "There is no instance for " ':<>: 'ShowType expr
- type NoInstanceForSub (tycls :: k) (expr :: k') = ((('Text "There is no instance for " ':<>: 'ShowType tycls) ':<>: 'Text " (") ':<>: 'ShowType expr) ':<>: 'Text " :> ...)"
- type ErrorIfNoGeneric (routes :: Type -> Type) = Break (NoGeneric routes :: Type) (Rep (routes ()))
Documentation
type PartialApplication (tycls :: k) (expr :: k') = NoInstanceForSub tycls expr ':$$: ((('ShowType expr ':<>: 'Text " expects ") ':<>: 'ShowType (Arity expr)) ':<>: 'Text " more arguments") Source #
No instance exists for tycls (expr :> ...) because expr is not fully saturated.
type NoInstanceFor (expr :: k) = 'Text "There is no instance for " ':<>: 'ShowType expr Source #
No instance exists for expr.