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 --- .../hrtb-trait-object-paren-notation.rs | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/test/ui/higher-rank-trait-bounds/hrtb-trait-object-paren-notation.rs (limited to 'src/test/ui/higher-rank-trait-bounds/hrtb-trait-object-paren-notation.rs') diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-trait-object-paren-notation.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-trait-object-paren-notation.rs new file mode 100644 index 000000000..d8c726cdd --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/hrtb-trait-object-paren-notation.rs @@ -0,0 +1,26 @@ +// run-pass +// A basic test of using a higher-ranked trait bound. + +trait FnLike { + fn call(&self, arg: A) -> R; +} + +type FnObject<'b> = dyn for<'a> FnLike<(&'a i32,), &'a i32> + 'b; + +struct Identity; + +impl<'a, T> FnLike<(&'a T,), &'a T> for Identity { + fn call(&self, (arg,): (&'a T,)) -> &'a T { + arg + } +} + +fn call_repeatedly(f: &FnObject) { + let x = 3; + let y = f.call((&x,)); + assert_eq!(3, *y); +} + +fn main() { + call_repeatedly(&Identity); +} -- cgit v1.2.3