Do not remove method call if type is adjusted (#15181)

Propose to replace `x.map_or(false, |y| y == z)` by `x == Some(z)` only
if `x` is not adjusted. Otherwise, the type of `x` in the comparaison
may not be the expected one, as it may be the product of an auto-deref.

changelog: [`unnecessary_map_or`]: do not propose to replace the
`map_or` call by a comparaison if types wouldn't be correct

Fixes rust-lang/rust-clippy#15180

clippy_lints/src/methods/unnecessary_map_or.rs

@@ -62,7 +62,8 @@ pub(super) fn check<'a>(
 
     let ext_def_span = def.span.until(map.span);
 
-    let (sugg, method, applicability) = if let ExprKind::Closure(map_closure) = map.kind
+    let (sugg, method, applicability) = if cx.typeck_results().expr_adjustments(recv).is_empty()
+            && let ExprKind::Closure(map_closure) = map.kind
             && let closure_body = cx.tcx.hir_body(map_closure.body)
             && let closure_body_value = closure_body.value.peel_blocks()
             && let ExprKind::Binary(op, l, r) = closure_body_value.kind

tests/ui/unnecessary_map_or.fixed

@@ -130,3 +130,13 @@ fn issue14201(a: Option<String>, b: Option<String>, s: &String) -> bool {
     //~^ unnecessary_map_or
     x && y
 }
+
+fn issue15180() {
+    let s = std::sync::Mutex::new(Some("foo"));
+    _ = s.lock().unwrap().is_some_and(|s| s == "foo");
+    //~^ unnecessary_map_or
+
+    let s = &&&&Some("foo");
+    _ = s.is_some_and(|s| s == "foo");
+    //~^ unnecessary_map_or
+}

tests/ui/unnecessary_map_or.rs

@@ -134,3 +134,13 @@ fn issue14201(a: Option<String>, b: Option<String>, s: &String) -> bool {
     //~^ unnecessary_map_or
     x && y
 }
+
+fn issue15180() {
+    let s = std::sync::Mutex::new(Some("foo"));
+    _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+    //~^ unnecessary_map_or
+
+    let s = &&&&Some("foo");
+    _ = s.map_or(false, |s| s == "foo");
+    //~^ unnecessary_map_or
+}

tests/ui/unnecessary_map_or.stderr

@@ -326,5 +326,29 @@ LL -     let y = b.map_or(true, |b| b == *s);
 LL +     let y = b.is_none_or(|b| b == *s);
    |
 
-error: aborting due to 26 previous errors
+error: this `map_or` can be simplified
+  --> tests/ui/unnecessary_map_or.rs:140:9
+   |
+LL |     _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: use is_some_and instead
+   |
+LL -     _ = s.lock().unwrap().map_or(false, |s| s == "foo");
+LL +     _ = s.lock().unwrap().is_some_and(|s| s == "foo");
+   |
+
+error: this `map_or` can be simplified
+  --> tests/ui/unnecessary_map_or.rs:144:9
+   |
+LL |     _ = s.map_or(false, |s| s == "foo");
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+help: use is_some_and instead
+   |
+LL -     _ = s.map_or(false, |s| s == "foo");
+LL +     _ = s.is_some_and(|s| s == "foo");
+   |
+
+error: aborting due to 28 previous errors