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//@ build-fail
fn assert_zst<T>() {
struct F<T>(T);
impl<T> F<T> {
const V: () = assert!(std::mem::size_of::<T>() == 0);
//~^ ERROR: evaluation of `assert_zst::F::<u32>::V` failed [E0080]
//~| NOTE: in this expansion of assert!
//~| NOTE: the evaluated program panicked
//~| ERROR: evaluation of `assert_zst::F::<i32>::V` failed [E0080]
//~| NOTE: in this expansion of assert!
//~| NOTE: the evaluated program panicked
}
F::<T>::V;
//~^NOTE: erroneous constant
//~|NOTE: erroneous constant
//~|NOTE: duplicate
}
fn foo<U>() {
assert_zst::<U>()
//~^ NOTE: the above error was encountered while instantiating `fn assert_zst::<u32>`
//~| NOTE: the above error was encountered while instantiating `fn assert_zst::<i32>`
}
fn bar<V>() {
foo::<V>()
}
fn main() {
bar::<()>();
bar::<u32>();
bar::<u32>();
bar::<i32>();
}
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