summaryrefslogtreecommitdiffstats
path: root/src/test/ui/issues/issue-54302-cases.rs
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/test/ui/issues/issue-54302-cases.rs85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-54302-cases.rs b/src/test/ui/issues/issue-54302-cases.rs
new file mode 100644
index 000000000..faa116269
--- /dev/null
+++ b/src/test/ui/issues/issue-54302-cases.rs
@@ -0,0 +1,85 @@
+trait Mirror {
+ type Image;
+ fn coerce(self) -> Self::Image;
+}
+
+impl<T> Mirror for T {
+ type Image = T;
+ fn coerce(self) -> Self { self }
+}
+
+trait Foo<'x, T> {
+ fn foo(self) -> &'x T;
+}
+
+impl<'s, 'x, T: 'x> Foo<'x, T> for &'s T where &'s T: Foo2<'x, T> {
+ fn foo(self) -> &'x T { self.foo2() }
+}
+
+trait Foo2<'x, T> {
+ fn foo2(self) -> &'x T;
+}
+
+// example 1 - fails leak check
+impl<'x> Foo2<'x, u32> for &'x u32
+{
+ fn foo2(self) -> &'x u32 { self }
+}
+
+// example 2 - OK with this issue
+impl<'x, 'a: 'x> Foo2<'x, i32> for &'a i32
+{
+ fn foo2(self) -> &'x i32 { self }
+}
+
+// example 3 - fails due to issue #XYZ + Leak-check
+impl<'x, T> Foo2<'x, u64> for T
+ where T: Mirror<Image=&'x u64>
+{
+ fn foo2(self) -> &'x u64 { self.coerce() }
+}
+
+// example 4 - fails due to issue #XYZ
+impl<'x, 'a: 'x, T> Foo2<'x, i64> for T
+ where T: Mirror<Image=&'a i64>
+{
+ fn foo2(self) -> &'x i64 { self.coerce() }
+}
+
+
+trait RefFoo<T> {
+ fn ref_foo(&self) -> &'static T;
+}
+
+impl<T> RefFoo<T> for T where for<'a> &'a T: Foo<'static, T> {
+ fn ref_foo(&self) -> &'static T {
+ self.foo()
+ }
+}
+
+
+fn coerce_lifetime1(a: &u32) -> &'static u32
+{
+ <u32 as RefFoo<u32>>::ref_foo(a)
+ //~^ ERROR not general enough
+}
+
+fn coerce_lifetime2(a: &i32) -> &'static i32
+{
+ <i32 as RefFoo<i32>>::ref_foo(a)
+ //~^ ERROR not general enough
+}
+
+fn coerce_lifetime3(a: &u64) -> &'static u64
+{
+ <u64 as RefFoo<u64>>::ref_foo(a)
+ //~^ ERROR not general enough
+}
+
+fn coerce_lifetime4(a: &i64) -> &'static i64
+{
+ <i64 as RefFoo<i64>>::ref_foo(a)
+ //~^ ERROR not general enough
+}
+
+fn main() {}