rust-clippy/tests/ui/let_underscore_lock.rs

44 lines
1.1 KiB
Rust

#![warn(clippy::let_underscore_lock)]
extern crate parking_lot;
fn main() {
use parking_lot::lock_api::RawMutex;
use parking_lot::{Mutex, RwLock};
let p_m: Mutex<()> = Mutex::const_new(RawMutex::INIT, ());
let _ = p_m.lock();
//~^ ERROR: non-binding `let` on a synchronization lock
let p_m1 = Mutex::new(0);
let _ = p_m1.lock();
//~^ ERROR: non-binding `let` on a synchronization lock
let p_rw = RwLock::new(0);
let _ = p_rw.read();
//~^ ERROR: non-binding `let` on a synchronization lock
let _ = p_rw.write();
//~^ ERROR: non-binding `let` on a synchronization lock
// These shouldn't throw an error.
let _ = p_m;
let _ = p_m1;
let _ = p_rw;
}
fn uplifted() {
// shouldn't lint std locks as they were uplifted as rustc's `let_underscore_lock`
let m = std::sync::Mutex::new(());
let rw = std::sync::RwLock::new(());
let _ = m.lock();
let _ = rw.read();
let _ = rw.write();
let _ = m.try_lock();
let _ = rw.try_read();
let _ = rw.try_write();
let _ = m;
let _ = rw;
}