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 --- .../ui/regions/regions-lifetime-bounds-on-fns.rs | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 src/test/ui/regions/regions-lifetime-bounds-on-fns.rs (limited to 'src/test/ui/regions/regions-lifetime-bounds-on-fns.rs') diff --git a/src/test/ui/regions/regions-lifetime-bounds-on-fns.rs b/src/test/ui/regions/regions-lifetime-bounds-on-fns.rs new file mode 100644 index 000000000..177f52fa7 --- /dev/null +++ b/src/test/ui/regions/regions-lifetime-bounds-on-fns.rs @@ -0,0 +1,30 @@ +fn a<'a, 'b:'a>(x: &mut &'a isize, y: &mut &'b isize) { + // Note: this is legal because of the `'b:'a` declaration. + *x = *y; +} + +fn b<'a, 'b>(x: &mut &'a isize, y: &mut &'b isize) { + // Illegal now because there is no `'b:'a` declaration. + *x = *y; +} + +fn c<'a,'b>(x: &mut &'a isize, y: &mut &'b isize) { + // Here we try to call `foo` but do not know that `'a` and `'b` are + // related as required. + a(x, y); +} + +fn d() { + // 'a and 'b are early bound in the function `a` because they appear + // inconstraints: + let _: fn(&mut &isize, &mut &isize) = a; + //~^ ERROR mismatched types [E0308] +} + +fn e() { + // 'a and 'b are late bound in the function `b` because there are + // no constraints: + let _: fn(&mut &isize, &mut &isize) = b; +} + +fn main() { } -- cgit v1.2.3