坠落
一个提供失败match的宏。
要求
在Cargo.toml包含以下Cargo.toml ：
[ dependencies . fallthrough ]
git = " https://github.com/pythonesque/fallthrough "
version = " 0.0.1 "
在你的lib.rs ：
#[macro_use] extern crate fallthrough;
用法
#[allow(unreachable_code)]
fn main () {
let mut x = 0 ;
match_fallthrough! (x, {
0 => { assert_eq! (x, 0 ); x = 1 ; },
1 => { assert_eq! (x, 1 ); x = 2 ; break ; },
