A commandline parsing library, based on getopt. Comes with a
powerful attribute system. Supports complex interfaces with many
options and commands, with option & command grouping, with simple
and convenient API. Even though quite powerful, it strives to keep
simple things simple. The library uses System.Console.GetOpt as
its backend.
In comparison to the other commandline handling libraries:
Compared to cmdargs, cmdlib has a pure attribute system and is
based on GetOpt for help formatting & argument parsing. Cmdlib may
also be more extendable due to typeclass design, and can use
user-supplied types for option arguments.
Cmdargs >= 0.4 can optionally use a pure attribute system,
although this is clearly an add-on and the API is a second-class
citizen in relation to the impure version.
GetOpt and parseargs both require explicit flag representation, so
they live a level below cmdlib. GetOpt is in fact used as a
backend by cmdlib.
