ref: 8a788aea84aad3bfbd5b39d78c1925654f3b9e14
dir: /module/arg.m/
Arg : module
{
PATH: con "/dis/lib/arg.dis";
init: fn(argv: list of string);
setusage: fn(usage: string);
usage: fn();
opt: fn(): int;
arg: fn(): string;
earg: fn(): string;
progname: fn(): string;
argv: fn(): list of string;
};