为什么String与String无法使用 == 比较?
use std::io; use std::fmt::{Debug, Display, Formatter, Result}; macro_rules! parse_input { ($x:expr, $t:ident) => ($x.trim().parse::<$t>().unwrap()) } #[derive(Debug, Clone, Copy)] enum...
use std::io; use std::fmt::{Debug, Display, Formatter, Result}; macro_rules! parse_input { ($x:expr, $t:ident) => ($x.trim().parse::<$t>().unwrap()) } #[derive(Debug, Clone, Copy)] enum...