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 --- src/test/ui/type-alias-impl-trait/reveal_local.rs | 25 +++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/test/ui/type-alias-impl-trait/reveal_local.rs (limited to 'src/test/ui/type-alias-impl-trait/reveal_local.rs') diff --git a/src/test/ui/type-alias-impl-trait/reveal_local.rs b/src/test/ui/type-alias-impl-trait/reveal_local.rs new file mode 100644 index 000000000..7ecb55353 --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/reveal_local.rs @@ -0,0 +1,25 @@ +#![feature(type_alias_impl_trait)] + +use std::fmt::Debug; + +type Foo = impl Debug; +//~^ ERROR cycle detected + +fn is_send() { } + +fn not_good() { + // Error: this function does not constrain `Foo` to any particular + // hidden type, so it cannot rely on `Send` being true. + is_send::(); +} + +fn not_gooder() { + // Constrain `Foo = u32` + let x: Foo = 22_u32; + + // while we could know this from the hidden type, it would + // need extra roundabout logic to support it. + is_send::(); +} + +fn main() {} -- cgit v1.2.3