Function chomp::ascii::signed

pub fn signed<I: Input<Token = u8>, T, F>(i: I, f: F) -> SimpleResult<I, T> where
    T: Copy + ValueFrom<i8, Err = NoError> + Add<Output = T> + Mul<Output = T>,
    F: FnOnce(I) -> SimpleResult<I, T>, 

Parses a number with an optional leading '+' or '-'.

Note

The from i8 bound here is usually smaller than the number parser requirement for signed integers (usually the smallest possible signed is i16).

Example

use chomp::parse_only;
use chomp::ascii::{decimal, signed};

let r: Result<i16, _> = parse_only(|i| signed(i, decimal), b"-123");

assert_eq!(r, Ok(-123i16));