Macro first

macro_rules! first {
    ($input:expr, $submacro:ident!($($arguments:tt)*)) => { ... };
    ($input:expr, $f:expr) => { ... };
}

first!(I -> Result<I, O>) => I -> Result<I, O> is applying the skip rule before the first argument; it allows to skip tokens.

Examples

use tagua_parser::Result;

named!(
    test,
    first!(tag!("bar"))
);

assert_eq!(test(&b"/* foo */bar"[..]), Result::Done(&b""[..], &b"bar"[..]));