diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs')
-rw-r--r-- | src/test/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs b/src/test/ui/regions/auxiliary/rbmtp_cross_crate_lib.rs new file mode 100644 index 000000000..ce2a3a7db --- /dev/null +++ b/src/test/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!() } +} |