Macro peel_ip::prelude::take_while1

macro_rules! take_while1 {
    ( $ input : expr , $ submac : ident ! ( $ ( $ args : tt ) * ) ) => { ... };
    (
$ input : expr , $ f : expr ) => { ... };
}

take_while1!(&[T] -> bool) => &[T] -> IResult<&[T], &[T]> returns the longest (non empty) list of bytes until the provided function fails.

The argument is either a function &[T] -> bool or a macro returning a `bool