on package:ghc
Make a
Demand evaluated at-most-once.
True when the signature indicates all arguments are boxed
Info about a lambda-bound variable, if the Id is one
Like
finally, but only performs the final action if there was
an exception raised by the computation.
onJust x m f applies f to the value inside the Just or
returns the default.
Utility function to go from a singleton list to it's element.
Wether or not the argument is a singleton list is only checked in
debug builds.
The flag only affects the non-interactive GHC
The flag only affects the interactive GHC