+// edition:2018
// run-rustfix
#![warn(clippy::option_if_let_else)]
#![allow(clippy::redundant_closure)]
+#![allow(clippy::ref_option_ref)]
fn bad1(string: Option<&str>) -> (bool, &str) {
string.map_or((false, "hello"), |x| (true, x))
fn else_if_option(string: Option<&str>) -> Option<(bool, &str)> {
if string.is_none() {
None
- } else { string.map_or(Some((false, "")), |x| Some((true, x))) }
+ } else if let Some(x) = string {
+ Some((true, x))
+ } else {
+ Some((false, ""))
+ }
}
fn unop_bad(string: &Option<&str>, mut num: Option<i32>) {
test_map_or_else(None);
let _ = negative_tests(None);
let _ = impure_else(None);
+
+ let _ = Some(0).map_or(0, |x| loop {
+ if x == 0 {
+ break x;
+ }
+ });
+
+ // #7576
+ const fn _f(x: Option<u32>) -> u32 {
+ // Don't lint, `map_or` isn't const
+ if let Some(x) = x { x } else { 10 }
+ }
+
+ // #5822
+ let s = String::new();
+ // Don't lint, `Some` branch consumes `s`, but else branch uses `s`
+ let _ = if let Some(x) = Some(0) {
+ let s = s;
+ s.len() + x
+ } else {
+ s.len()
+ };
+
+ let s = String::new();
+ // Lint, both branches immutably borrow `s`.
+ let _ = Some(0).map_or_else(|| s.len(), |x| s.len() + x);
+
+ let s = String::new();
+ // Lint, `Some` branch consumes `s`, but else branch doesn't use `s`.
+ let _ = Some(0).map_or(1, |x| {
+ let s = s;
+ s.len() + x
+ });
+
+ let s = Some(String::new());
+ // Don't lint, `Some` branch borrows `s`, but else branch consumes `s`
+ let _ = if let Some(x) = &s {
+ x.len()
+ } else {
+ let _s = s;
+ 10
+ };
+
+ let mut s = Some(String::new());
+ // Don't lint, `Some` branch mutably borrows `s`, but else branch also borrows `s`
+ let _ = if let Some(x) = &mut s {
+ x.push_str("test");
+ x.len()
+ } else {
+ let _s = &s;
+ 10
+ };
+
+ async fn _f1(x: u32) -> u32 {
+ x
+ }
+
+ async fn _f2() {
+ // Don't lint. `await` can't be moved into a closure.
+ let _ = if let Some(x) = Some(0) { _f1(x).await } else { 0 };
+ }
}