Function combine::parser::char::string_cmp

pub fn string_cmp<'a, C, Input>(
    s: &'static str, 
    cmp: C
) -> impl Parser<Input, Output = &'a str> where
    C: FnMut(char, char) -> bool,
    Input: Stream<Token = char>,
    Input::Error: ParseError<Input::Token, Input::Range, Input::Position>, 

Parses the string s, using cmp to compare each character.

let result = string_cmp("rust", |l, r| l.eq_ignore_ascii_case(&r))
    .parse("RusT")
    .map(|x| x.0);
assert_eq!(result, Ok("rust"));