diff options
Diffstat (limited to 'src/test/ui/dropck/issue-28498-ugeh-with-trait-bound.rs')
-rw-r--r-- | src/test/ui/dropck/issue-28498-ugeh-with-trait-bound.rs | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/src/test/ui/dropck/issue-28498-ugeh-with-trait-bound.rs b/src/test/ui/dropck/issue-28498-ugeh-with-trait-bound.rs deleted file mode 100644 index 61d11cf38..000000000 --- a/src/test/ui/dropck/issue-28498-ugeh-with-trait-bound.rs +++ /dev/null @@ -1,41 +0,0 @@ -// run-pass - -// Demonstrate the use of the unguarded escape hatch with a trait bound -// to assert that destructor will not access any dead data. -// -// Compare with ui/span/issue28498-reject-trait-bound.rs - -#![feature(dropck_eyepatch)] - -use std::fmt; - -#[derive(Debug)] -struct ScribbleOnDrop(String); - -impl Drop for ScribbleOnDrop { - fn drop(&mut self) { - self.0 = format!("DROPPED"); - } -} - -struct Foo<T: fmt::Debug>(u32, T); - -unsafe impl<#[may_dangle] T: fmt::Debug> Drop for Foo<T> { - fn drop(&mut self) { - // Use of `may_dangle` is sound, because destructor never accesses - // the `Debug::fmt` method of `T`, despite having it available. - println!("Dropping Foo({}, _)", self.0); - } -} - -fn main() { - let (last_dropped, foo0); - let (foo1, first_dropped); - - last_dropped = ScribbleOnDrop(format!("last")); - first_dropped = ScribbleOnDrop(format!("first")); - foo0 = Foo(0, &last_dropped); - foo1 = Foo(1, &first_dropped); - - println!("foo0.1: {:?} foo1.1: {:?}", foo0.1, foo1.1); -} |