Macro for_args

macro_rules! for_args {
    ($iter:expr; $match:tt) => { ... };
}

Matches each part of each argument in a &str iterator (like env::args), using the match_arg macro.

Expands to:

while let Some(args) in $iter.next() {
    for arg in args.as_arg() {
        match arg { $match }
    }
}