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

Moduleeither-n-0.1.0.0Haskell2010

Data.Lens.Injection.Injection13

The thirteenth injection of a sum type, as a prism. The sum-type dual of Control.Lens.Field13.

  • 1 class
  • Packageeither-n-0.1.0.0
  • Exports1
  • LanguageHaskell2010
  • LicenceBSD-3-Clause
  • SourceInjection13.hs
classclass Injection13 s t a b | s -> a, t -> b, s b -> t, t a -> s where
#

Access the thirteenth constructor of a sum type.

Where Control.Lens._13 is the thirteenth projection out of a product, _I13 is the thirteenth injection into a sum.

The default implementation is the prism to the thirteenth constructor of a Generic type, injection (Proxy :: Proxy 12).

Example3 expressions
data T = C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | C11 | C12 | C13 Int | C14 deriving (Show, Generic)instance Injection13 T T Int IntC13 1 ^? _I13Just 1
Example1 expression
C14 ^? _I13Nothing
Example1 expression
_I13 # 1 :: TC13 1

Methods