From 4f9fe856a25ab29345b90e7725509e9ee38a37be Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:41 +0200 Subject: Adding upstream version 1.69.0+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/derives/deriving-with-repr-packed-2.rs | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 tests/ui/derives/deriving-with-repr-packed-2.rs (limited to 'tests/ui/derives/deriving-with-repr-packed-2.rs') diff --git a/tests/ui/derives/deriving-with-repr-packed-2.rs b/tests/ui/derives/deriving-with-repr-packed-2.rs new file mode 100644 index 000000000..79aca74df --- /dev/null +++ b/tests/ui/derives/deriving-with-repr-packed-2.rs @@ -0,0 +1,20 @@ +// Check that deriving certain builtin traits on certain packed structs cause +// errors. To avoid potentially misaligned references, field copies must be +// used, which involves adding `T: Copy` bounds. + +#[derive(Copy, Clone, Default, PartialEq, Eq)] +#[repr(packed)] +pub struct Foo(T, T, T); + +struct NonCopy; + +fn main() { + // This one is fine because `u32` impls `Copy`. + let x: Foo = Foo(1, 2, 3); + _ = x.clone(); + + // This one is an error because `NonCopy` doesn't impl `Copy`. + let x: Foo = Foo(NonCopy, NonCopy, NonCopy); + _ = x.clone(); + //~^ ERROR the method `clone` exists for struct `Foo`, but its trait bounds were not satisfied +} -- cgit v1.2.3