Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/test/ui/unsized/unsized2.rs b/src/test/ui/unsized/unsized2.rs
new file mode 100644
index 000000000..bbeb00d5f
--- /dev/null
+++ b/src/test/ui/unsized/unsized2.rs
@@ -0,0 +1,96 @@
+// run-pass
+
+#![allow(unconditional_recursion)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(unused_imports)]
+
+// Test sized-ness checking in substitution.
+
+use std::marker;
+
+// Unbounded.
+fn f1<X: ?Sized>(x: &X) {
+    f1::<X>(x);
+}
+fn f2<X>(x: &X) {
+    f1::<X>(x);
+    f2::<X>(x);
+}
+
+// Bounded.
+trait T { fn dummy(&self) { } }
+fn f3<X: T+?Sized>(x: &X) {
+    f3::<X>(x);
+}
+fn f4<X: T>(x: &X) {
+    f3::<X>(x);
+    f4::<X>(x);
+}
+
+// Self type.
+trait T2 {
+    fn f() -> Box<Self>;
+}
+struct S;
+impl T2 for S {
+    fn f() -> Box<S> {
+        Box::new(S)
+    }
+}
+fn f5<X: ?Sized+T2>(x: &X) {
+    let _: Box<X> = T2::f();
+}
+fn f6<X: T2>(x: &X) {
+    let _: Box<X> = T2::f();
+}
+
+trait T3 {
+    fn f() -> Box<Self>;
+}
+impl T3 for S {
+    fn f() -> Box<S> {
+        Box::new(S)
+    }
+}
+fn f7<X: ?Sized+T3>(x: &X) {
+    // This is valid, but the unsized bound on X is irrelevant because any type
+    // which implements T3 must have statically known size.
+    let _: Box<X> = T3::f();
+}
+
+trait T4<X> {
+    fn dummy(&self) { }
+    fn m1(&self, x: &dyn T4<X>, y: X);
+    fn m2(&self, x: &dyn T5<X>, y: X);
+}
+trait T5<X: ?Sized> {
+    fn dummy(&self) { }
+    // not an error (for now)
+    fn m1(&self, x: &dyn T4<X>);
+    fn m2(&self, x: &dyn T5<X>);
+}
+
+trait T6<X: T> {
+    fn dummy(&self) { }
+    fn m1(&self, x: &dyn T4<X>);
+    fn m2(&self, x: &dyn T5<X>);
+}
+trait T7<X: ?Sized+T> {
+    fn dummy(&self) { }
+    // not an error (for now)
+    fn m1(&self, x: &dyn T4<X>);
+    fn m2(&self, x: &dyn T5<X>);
+}
+
+// The last field in a struct may be unsized
+struct S2<X: ?Sized> {
+    f: X,
+}
+struct S3<X: ?Sized> {
+    f1: isize,
+    f2: X,
+}
+
+pub fn main() {
+}