| Copyright | © 2017 All rights reserved. |
|---|---|
| License | GPL-3 |
| Maintainer | Evan Cofsky <evan@theunixman.com> |
| Stability | experimental |
| Portability | POSIX |
| Safe Haskell | None |
| Language | Haskell2010 |
Environment
Description
Documentation
A key in the Environment.
A value in the Environment
environment :: MonadIO m => Lens EnvName (m ()) (m (Maybe EnvValue)) EnvValue Source #
Lens for the system environment.
lens ∷ Functor f => (s -> a) -> (s -> b -> t) -> (a -> f b) -> s -> f t
Lens s t a b = Functor f ⇒ (a → f b) → s → f t
lookupEnv
s → a: EnvName → m (Maybe EnvValue)
setEnv
s → b → t: EnvName → EnvValue → m ()
s: EnvName t: m () a: m (Maybe EnvValue) b: EnvValue