rust/tests/mut_mut_macro.rs

#![feature(plugin)]
#![plugin(clippy, regex_macros)]

#[macro_use]
extern crate lazy_static;
extern crate regex;

use std::collections::HashMap;

#[test]
#[deny(mut_mut)]
fn test_regex() {
	let pattern = regex!(r"^(?P<level>[#]+)\s(?P<title>.+)$");
	assert!(pattern.is_match("# headline"));
}

#[test]
#[deny(mut_mut)]
#[allow(unused_variables, unused_mut)]
fn test_lazy_static() {
	lazy_static! {
		static ref MUT_MAP : HashMap<usize, &'static str> = {
			let mut m = HashMap::new();
			let mut zero = &mut &mut "zero";
			m.insert(0, "zero");
			m
		};
		static ref MUT_COUNT : usize = MUT_MAP.len();
	}
	assert!(*MUT_COUNT == 1);
}