54 lines
1.3 KiB
Rust
54 lines
1.3 KiB
Rust
// Copyright 2014-2019 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// run-rustfix
|
|
// aux-build:macro_rules.rs
|
|
#![allow(unused_imports)]
|
|
#![warn(
|
|
clippy::all,
|
|
clippy::style,
|
|
clippy::mem_replace_option_with_none,
|
|
clippy::mem_replace_with_default
|
|
)]
|
|
|
|
#[macro_use]
|
|
extern crate macro_rules;
|
|
|
|
use std::mem;
|
|
|
|
macro_rules! take {
|
|
($s:expr) => {
|
|
std::mem::replace($s, Default::default())
|
|
};
|
|
}
|
|
|
|
fn replace_option_with_none() {
|
|
let mut an_option = Some(1);
|
|
let _ = an_option.take();
|
|
let an_option = &mut Some(1);
|
|
let _ = an_option.take();
|
|
}
|
|
|
|
fn replace_with_default() {
|
|
let mut s = String::from("foo");
|
|
let _ = std::mem::take(&mut s);
|
|
let s = &mut String::from("foo");
|
|
let _ = std::mem::take(s);
|
|
let _ = std::mem::take(s);
|
|
|
|
// dont lint within macros
|
|
take!(s);
|
|
take_external!(s);
|
|
}
|
|
|
|
fn main() {
|
|
replace_option_with_none();
|
|
replace_with_default();
|
|
}
|