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#![warn(clippy::if_let_mutex)]
use std::ops::Deref;
use std::sync::Mutex;
fn do_stuff<T>(_: T) {}
fn if_let() {
let m = Mutex::new(1_u8);
if let Err(locked) = m.lock() {
do_stuff(locked);
} else {
let lock = m.lock().unwrap();
do_stuff(lock);
};
}
// This is the most common case as the above case is pretty
// contrived.
fn if_let_option() {
let m = Mutex::new(Some(0_u8));
if let Some(locked) = m.lock().unwrap().deref() {
do_stuff(locked);
} else {
let lock = m.lock().unwrap();
do_stuff(lock);
};
}
// When mutexes are different don't warn
fn if_let_different_mutex() {
let m = Mutex::new(Some(0_u8));
let other = Mutex::new(None::<u8>);
if let Some(locked) = m.lock().unwrap().deref() {
do_stuff(locked);
} else {
let lock = other.lock().unwrap();
do_stuff(lock);
};
}
fn mutex_ref(mutex: &Mutex<i32>) {
if let Ok(i) = mutex.lock() {
do_stuff(i);
} else {
let _x = mutex.lock();
};
}
fn main() {}
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