Macro peel_ip::prelude::count

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

count!(I -> IResult<I,O>, nb) => I -> IResult<I, Vec<O>> Applies the child parser a specified number of times

 named!(counter< Vec<&[u8]> >, count!( tag!( "abcd" ), 2 ) );

 let a = b"abcdabcdabcdef";
 let b = b"abcdefgh";
 let res = vec![&b"abcd"[..], &b"abcd"[..]];

 assert_eq!(counter(&a[..]), Done(&b"abcdef"[..], res));
 assert_eq!(counter(&b[..]), Error(error_position!(ErrorKind::Count, &b[..])));