Macro nom::take_while_m_n

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

take_while_m_n!(m: usize, n: usize, T -> bool) => &[T] -> IResult<&[T], &[T]> returns a list of bytes or characters for which the provided function returns true. the returned list’s size will be at least m, and at most n

The argument is either a function T -> bool or a macro returning a bool.

Example

 named!( alpha, take_while_m_n!(3, 6, is_alphanumeric ) );

 let r = alpha(&b"abcd\nefgh"[..]);
 assert_eq!(r, Ok((&b"\nefgh"[..], &b"abcd"[..])));