Capture the entire contiguous matched input with nom

Question

I\'m looking to apply a series of nom parsers and return the complete &str that matches. I want to match strings of the form a+bc+. Using the e

Answer 1

It appears as if you want recognized!:

if the child parser was successful, return the consumed input as produced value

And an example:

#[macro_use]
extern crate nom;

use nom::IResult;

fn main() {
    assert_eq!(aaabccc(b"aaabcccffffd"), IResult::Done(&b"ffffd"[..], "aaabccc"));
}

named!(aaabccc <&[u8], &str>,
   map_res!(
       recognize!(
           chain!(
               take_while!(is_a) ~
               tag!("b") ~
               take_while!(is_c),
               || {}
           )
       ),
       std::str::from_utf8
   )
);

fn is_a(l: u8) -> bool {
   match l {
       b'a' => true,
       _ => false,
   }
}

fn is_c(l: u8) -> bool {
    match l {
        b'c' => true,
        _ => false,
    }
}

I'm not sure if chain! is the best way of combining sequential parsers if you don't care for the values, but it works in this case.