HORIZON HASKELLDocslts/ghc-9.14.x45dd5372026-10-11Search names, modules, packages, or :: a typeCtrl K

GHC 9.14.1 · lts/ghc-9.14.x · 45dd537 · 2026-10-11

Moduleeither-n-0.1.0.0Haskell2010

Data.Lens.Injection.Injection15

The fifteenth injection of a sum type, as a prism. The sum-type dual of Control.Lens.Field15.

  • 1 class
  • Packageeither-n-0.1.0.0
  • Exports1
  • LanguageHaskell2010
  • LicenceBSD-3-Clause
  • SourceInjection15.hs
classclass Injection15 s t a b | s -> a, t -> b, s b -> t, t a -> s where
#

Access the fifteenth constructor of a sum type.

Where Control.Lens._15 is the fifteenth projection out of a product, _I15 is the fifteenth injection into a sum.

The default implementation is the prism to the fifteenth constructor of a Generic type, injection (Proxy :: Proxy 14).

Example3 expressions
data T = C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | C11 | C12 | C13 | C14 | C15 Int | C16 deriving (Show, Generic)instance Injection15 T T Int IntC15 1 ^? _I15Just 1
Example1 expression
C16 ^? _I15Nothing
Example1 expression
_I15 # 1 :: TC15 1

Methods