Function nom_supreme::parse_from_str

pub fn parse_from_str<'a, F, T, E>(recognizer: F) -> impl Parser<&'a str, T, E> where
    F: Parser<&'a str, &'a str, E> + Sized,
    T: FromStr,
    E: FromExternalError<&'a str, T::Err>, 

A nom parser that parses any FromStr type. It uses a recognizer to parse the prefix string that should be parsed via FromStr.

Example

use nom_supreme::{parse_from_str, parser_ext::ParserExt};

fn parse_int(input: &str) -> IResult<&str, i64> {
    digit1.map_res(|s: &str| s.parse()).parse(input)
}

assert_eq!(parse_int("125 abc"), Ok((" abc", 125)));
assert_eq!(parse_int("abc"), Err(Err::Error(Error{input: "abc", code: ErrorKind::Digit})));

// The recognizer function determines what will be passed to `FromStr`.
// in this example, it doesn't accept a leading sign, so this will fail
// to parse.
assert_eq!(parse_int("-125"),  Err(Err::Error(Error{input: "-125", code: ErrorKind::Digit})));