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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/methods/method-recursive-blanket-impl.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/methods/method-recursive-blanket-impl.rs')
-rw-r--r--src/test/ui/methods/method-recursive-blanket-impl.rs41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/methods/method-recursive-blanket-impl.rs b/src/test/ui/methods/method-recursive-blanket-impl.rs
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index 000000000..a2db75b4e
--- /dev/null
+++ b/src/test/ui/methods/method-recursive-blanket-impl.rs
@@ -0,0 +1,41 @@
+// run-pass
+#![allow(unused_variables)]
+#![allow(unused_imports)]
+// Test that we don't trigger on the blanket impl for all `&'a T` but
+// rather keep autoderefing and trigger on the underlying impl. To
+// know not to stop at the blanket, we have to recursively evaluate
+// the `T:Foo` bound.
+
+// pretty-expanded FIXME #23616
+
+use std::marker::Sized;
+
+// Note: this must be generic for the problem to show up
+trait Foo<A> {
+ fn foo(&self, a: A);
+}
+
+impl Foo<u8> for [u8] {
+ fn foo(&self, a: u8) {}
+}
+
+impl<'a, A, T> Foo<A> for &'a T where T: Foo<A> {
+ fn foo(&self, a: A) {
+ Foo::foo(*self, a)
+ }
+}
+
+trait Bar {
+ fn foo(&self);
+}
+
+struct MyType;
+
+impl Bar for MyType {
+ fn foo(&self) {}
+}
+
+fn main() {
+ let mut m = MyType;
+ (&mut m).foo()
+}