From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/issues/issue-16739.rs | 45 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 tests/ui/issues/issue-16739.rs (limited to 'tests/ui/issues/issue-16739.rs') diff --git a/tests/ui/issues/issue-16739.rs b/tests/ui/issues/issue-16739.rs new file mode 100644 index 000000000..b21ea4bcd --- /dev/null +++ b/tests/ui/issues/issue-16739.rs @@ -0,0 +1,45 @@ +// run-pass +#![feature(unboxed_closures, fn_traits)] + +// Test that unboxing shim for calling rust-call ABI methods through a +// trait box works and does not cause an ICE. + +struct Foo { foo: u32 } + +impl FnMut<()> for Foo { + extern "rust-call" fn call_mut(&mut self, _: ()) -> u32 { self.foo } +} + +impl FnOnce<()> for Foo { + type Output = u32; + extern "rust-call" fn call_once(mut self, _: ()) -> u32 { self.call_mut(()) } +} + +impl FnMut<(u32,)> for Foo { + extern "rust-call" fn call_mut(&mut self, (x,): (u32,)) -> u32 { self.foo + x } +} + +impl FnOnce<(u32,)> for Foo { + type Output = u32; + extern "rust-call" fn call_once(mut self, args: (u32,)) -> u32 { self.call_mut(args) } +} + +impl FnMut<(u32,u32)> for Foo { + extern "rust-call" fn call_mut(&mut self, (x, y): (u32, u32)) -> u32 { self.foo + x + y } +} + +impl FnOnce<(u32,u32)> for Foo { + type Output = u32; + extern "rust-call" fn call_once(mut self, args: (u32,u32)) -> u32 { self.call_mut(args) } +} + +fn main() { + let mut f = Box::new(Foo { foo: 42 }) as Box u32>; + assert_eq!(f.call_mut(()), 42); + + let mut f = Box::new(Foo { foo: 40 }) as Box u32>; + assert_eq!(f.call_mut((2,)), 42); + + let mut f = Box::new(Foo { foo: 40 }) as Box u32>; + assert_eq!(f.call_mut((1, 1)), 42); +} -- cgit v1.2.3