Macro peel_ip::prelude::complete

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

replaces a Incomplete returned by the child parser with an Error

    named!(take_5, complete!(take!(5)));

    let a = &b"abcd"[..];
    let res_a = take_5(a);
    assert_eq!(res_a,  Error(error_position!(ErrorKind::Complete, a)));