From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- .../ui/regions/auxiliary/rbmtp_cross_crate_lib.rs | 32 ++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tests/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs (limited to 'tests/ui/regions/auxiliary') diff --git a/tests/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs b/tests/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs new file mode 100644 index 000000000..ce2a3a7db --- /dev/null +++ b/tests/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs @@ -0,0 +1,32 @@ +// Check that method bounds declared on traits/impls in a cross-crate +// scenario work. This is the library portion of the test. + +pub enum MaybeOwned<'a> { + Owned(isize), + Borrowed(&'a isize) +} + +pub struct Inv<'a> { // invariant w/r/t 'a + x: &'a mut &'a isize +} + +// I encountered a bug at some point with encoding the IntoMaybeOwned +// trait, so I'll use that as the template for this test. +pub trait IntoMaybeOwned<'a> { + fn into_maybe_owned(self) -> MaybeOwned<'a>; + + // Note: without this `into_inv` method, the trait is + // contravariant w/r/t `'a`, since if you look strictly at the + // interface, it only returns `'a`. This complicates the + // downstream test since it wants invariance to force an error. + // Hence we add this method. + fn into_inv(self) -> Inv<'a>; + + fn bigger_region<'b:'a>(self, b: Inv<'b>); +} + +impl<'a> IntoMaybeOwned<'a> for Inv<'a> { + fn into_maybe_owned(self) -> MaybeOwned<'a> { panic!() } + fn into_inv(self) -> Inv<'a> { panic!() } + fn bigger_region<'b:'a>(self, b: Inv<'b>) { panic!() } +} -- cgit v1.2.3