Test: check implemented for lifetime handling

gcc/testsuite/ChangeLog:

	* rust/compile/for_lifetimes.rs: New test.

Signed-off-by: Jakub Dupak <[email protected]>

gcc/testsuite/rust/compile/for_lifetimes.rs

@@ -0,0 +1,19 @@
+// { dg-additional-options "-frust-compile-until=typecheck" }
+
+fn function_pointer_as_argument(f: for<'a> fn(&'a i32) -> &'a i32) -> i32 {
+    0
+}
+
+fn function_pointer_as_return() -> for<'a> fn(&'a i32) -> &'a i32 {
+}
+
+// https://doc.rust-lang.org/reference/trait-bounds.html
+
+trait Fn<T> {}
+fn call_on_ref_zero<F>(f: F) where for<'a> F: Fn(&'a i32) {}
+
+fn call_on_ref_zero2<F>(f: F) where F: for<'a> Fn(&'a i32) {}
+
+trait Trait<'a, T: 'a> {}
+
+impl<'a, T> Trait<'a, T> for &'a T {}