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 --- .../higher-rank-trait-bounds/hrtb-fn-like-trait.rs | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 src/test/ui/higher-rank-trait-bounds/hrtb-fn-like-trait.rs (limited to 'src/test/ui/higher-rank-trait-bounds/hrtb-fn-like-trait.rs') diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-fn-like-trait.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-fn-like-trait.rs new file mode 100644 index 000000000..afab9986c --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/hrtb-fn-like-trait.rs @@ -0,0 +1,27 @@ +// run-pass +// A basic test of using a higher-ranked trait bound. + + +trait FnLike { + fn call(&self, arg: A) -> R; +} + +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: F) + where F : for<'a> FnLike<&'a isize, &'a isize> +{ + let x = 3; + let y = f.call(&x); + assert_eq!(3, *y); +} + +fn main() { + call_repeatedly(Identity); +} -- cgit v1.2.3