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