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, 37 insertions, 0 deletions

diff --git a/src/test/ui/dropck/auxiliary/dropck_eyepatch_extern_crate.rs b/src/test/ui/dropck/auxiliary/dropck_eyepatch_extern_crate.rs
new file mode 100644
index 000000000..e07082957
--- /dev/null
+++ b/src/test/ui/dropck/auxiliary/dropck_eyepatch_extern_crate.rs
@@ -0,0 +1,37 @@
+#![feature(dropck_eyepatch)]
+
+// This is a support file for ../dropck-eyepatch-extern-crate.rs
+//
+// The point of this test is to illustrate that the `#[may_dangle]`
+// attribute specifically allows, in the context of a type
+// implementing `Drop`, a generic parameter to be instantiated with a
+// lifetime that does not strictly outlive the owning type itself,
+// and that this attribute's effects are preserved when importing
+// the type from another crate.
+//
+// See also ../dropck-eyepatch.rs for more information about the general
+// structure of the test.
+
+use std::fmt;
+
+pub struct Dt<A: fmt::Debug>(pub &'static str, pub A);
+pub struct Dr<'a, B:'a+fmt::Debug>(pub &'static str, pub &'a B);
+pub struct Pt<A,B: fmt::Debug>(pub &'static str, pub A, pub B);
+pub struct Pr<'a, 'b, B:'a+'b+fmt::Debug>(pub &'static str, pub &'a B, pub &'b B);
+pub struct St<A: fmt::Debug>(pub &'static str, pub A);
+pub struct Sr<'a, B:'a+fmt::Debug>(pub &'static str, pub &'a B);
+
+impl<A: fmt::Debug> Drop for Dt<A> {
+    fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); }
+}
+impl<'a, B: fmt::Debug> Drop for Dr<'a, B> {
+    fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); }
+}
+unsafe impl<#[may_dangle] A, B: fmt::Debug> Drop for Pt<A, B> {
+    // (unsafe to access self.1  due to #[may_dangle] on A)
+    fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
+}
+unsafe impl<#[may_dangle] 'a, 'b, B: fmt::Debug> Drop for Pr<'a, 'b, B> {
+    // (unsafe to access self.1 due to #[may_dangle] on 'a)
+    fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
+}