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 --- tests/ui/regions/regions-lub-ref-ref-rc.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 tests/ui/regions/regions-lub-ref-ref-rc.rs (limited to 'tests/ui/regions/regions-lub-ref-ref-rc.rs') diff --git a/tests/ui/regions/regions-lub-ref-ref-rc.rs b/tests/ui/regions/regions-lub-ref-ref-rc.rs new file mode 100644 index 000000000..96c71b084 --- /dev/null +++ b/tests/ui/regions/regions-lub-ref-ref-rc.rs @@ -0,0 +1,28 @@ +// run-pass +#![allow(dead_code)] +// Test a corner case of LUB coercion. In this case, one arm of the +// match requires a deref coercion and the other doesn't, and there +// is an extra `&` on the `rc`. We want to be sure that the lifetime +// assigned to this `&rc` value is not `'a` but something smaller. In +// other words, the type from `rc` is `&'a Rc` and the type +// from `&rc` should be `&'x &'a Rc`, where `'x` is something +// small. + +use std::rc::Rc; + +#[derive(Clone)] +enum Cached<'mir> { + Ref(&'mir String), + Owned(Rc), +} + +impl<'mir> Cached<'mir> { + fn get_ref<'a>(&'a self) -> &'a String { + match *self { + Cached::Ref(r) => r, + Cached::Owned(ref rc) => &rc, + } + } +} + +fn main() { } -- cgit v1.2.3