From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- .../regions-no-variance-from-fn-generics.rs | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 src/test/ui/regions/regions-no-variance-from-fn-generics.rs (limited to 'src/test/ui/regions/regions-no-variance-from-fn-generics.rs') diff --git a/src/test/ui/regions/regions-no-variance-from-fn-generics.rs b/src/test/ui/regions/regions-no-variance-from-fn-generics.rs new file mode 100644 index 000000000..76706a827 --- /dev/null +++ b/src/test/ui/regions/regions-no-variance-from-fn-generics.rs @@ -0,0 +1,44 @@ +// run-pass +#![allow(unused_variables)] +// Issue #12856: a lifetime formal binding introduced by a generic fn +// should not upset the variance inference for actual occurrences of +// that lifetime in type expressions. + + +pub trait HasLife<'a> { + fn dummy(&'a self) { } // just to induce a variance on 'a +} + +trait UseLife01 { + fn refs<'a, H: HasLife<'a>>(&'a self) -> H; +} + +trait UseLife02 { + fn refs<'a, T: 'a, H: HasType<&'a T>>(&'a self) -> H; +} + + +pub trait HasType +{ + fn dummy(&self, t: T) -> T { panic!() } +} + + +trait UseLife03 { + fn refs<'a, H: HasType<&'a T>>(&'a self) -> H where T: 'a; +} + + +// (The functions below were not actually a problem observed during +// fixing of #12856; they just seem like natural tests to put in to +// cover a couple more points in the testing space) + +pub fn top_refs_1<'a, H: HasLife<'a>>(_s: &'a ()) -> H { + unimplemented!() +} + +pub fn top_refs_2<'a, T: 'a, H: HasType<&'a T>>(_s: &'a ()) -> H { + unimplemented!() +} + +pub fn main() {} -- cgit v1.2.3