io::read_number!
[−]
[src]
macro_rules! read_number { () => ({ match { read_character!() } { Some(45) => Some(-read_number!(0i8)), Some(d @ 48...57) => Some(read_number!(d - 48i8)), _ => None , } }); ($start: expr) => ({ extern crate io; read_number!($start, io::ffi::BUFF_READ_NUMBER) }); ($start: expr, $limit: expr) => ({ fn result ( acc: i64, lim: usize ) -> i64 { match { (read_character!(), lim) } { (Some(d @ 48...57), lim) if lim != 0 => result ( {acc * 10i64} + {d - 48i8} as i64, lim - 1 ), _ => acc, } } result($start as i64, $limit) }); }
The read_number
macro reads and
returns the number.