Instances2AsExitCode
AsExitCode SomeExceptionDefined in lens-5.3.6 · System.Exit.LensAsExitCode ExitCodeDefined in lens-5.3.6 · System.Exit.Lens
Modulelens-5.3.6Haskell2010
System.Exit.Lens
These prisms can be used with the combinators in Control.Exception.Lens.
- 1 class
- 2 values
- Packagelens-5.3.6
- Exports5
- LanguageHaskell2010
- LicenceBSD-2-Clause
- SourceLens.hs
indicates program failure with an exit code. The exact interpretation of the code is operating-system dependent. In particular, some values may be prohibited (e.g. 0 on a POSIX-compliant system).
_ExitFailure :: Prism' ExitCode Int
_ExitFailure :: Prism' SomeException Int
indicates successful termination;
_ExitSuccess :: Prism' ExitCode ()
_ExitSuccess :: Prism' SomeException ()