diff options
Diffstat (limited to 'src/test/ui/traits/trait-upcasting/type-checking-test-4.rs')
-rw-r--r-- | src/test/ui/traits/trait-upcasting/type-checking-test-4.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/ui/traits/trait-upcasting/type-checking-test-4.rs b/src/test/ui/traits/trait-upcasting/type-checking-test-4.rs new file mode 100644 index 000000000..70ccc87fc --- /dev/null +++ b/src/test/ui/traits/trait-upcasting/type-checking-test-4.rs @@ -0,0 +1,49 @@ +#![feature(trait_upcasting)] +#![allow(incomplete_features)] + +trait Foo<'a>: Bar<'a, 'a> {} +trait Bar<'a, 'b> { + fn get_b(&self) -> Option<&'a u32> { + None + } +} + +fn test_correct(x: &dyn Foo<'static>) { + let _ = x as &dyn Bar<'static, 'static>; +} + +fn test_wrong1<'a>(x: &dyn Foo<'static>, y: &'a u32) { + let _ = x as &dyn Bar<'static, 'a>; // Error + //~^ ERROR lifetime may not live long enough +} + +fn test_wrong2<'a>(x: &dyn Foo<'static>, y: &'a u32) { + let _ = x as &dyn Bar<'a, 'static>; // Error + //~^ ERROR lifetime may not live long enough +} + +fn test_wrong3<'a>(x: &dyn Foo<'a>) -> Option<&'static u32> { + let y = x as &dyn Bar<'_, '_>; + y.get_b() // ERROR + //~^ ERROR lifetime may not live long enough +} + +fn test_wrong4<'a>(x: &dyn Foo<'a>) -> Option<&'static u32> { + <_ as Bar>::get_b(x) // ERROR + //~^ ERROR lifetime may not live long enough +} + +fn test_wrong5<'a>(x: &dyn Foo<'a>) -> Option<&'static u32> { + <_ as Bar<'_, '_>>::get_b(x) // ERROR + //~^ ERROR lifetime may not live long enough +} + +fn test_wrong6<'a>(x: &dyn Foo<'a>) -> Option<&'static u32> { + let y = x as &dyn Bar<'_, '_>; + y.get_b(); // ERROR + let z = y; + z.get_b() // ERROR + //~^ ERROR lifetime may not live long enough +} + +fn main() {} |