diff options
Diffstat (limited to 'tests/ui/object-safety/object-safety-generics.rs')
-rw-r--r-- | tests/ui/object-safety/object-safety-generics.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/object-safety/object-safety-generics.rs b/tests/ui/object-safety/object-safety-generics.rs new file mode 100644 index 000000000..63dcd1699 --- /dev/null +++ b/tests/ui/object-safety/object-safety-generics.rs @@ -0,0 +1,39 @@ +// Check that we correctly prevent users from making trait objects +// from traits with generic methods, unless `where Self : Sized` is +// present. +// revisions: curr object_safe_for_dispatch + +#![cfg_attr(object_safe_for_dispatch, feature(object_safe_for_dispatch))] + + +trait Bar { + fn bar<T>(&self, t: T); +} + +trait Quux { + fn bar<T>(&self, t: T) + where Self : Sized; +} + +fn make_bar<T:Bar>(t: &T) -> &dyn Bar { + //[curr]~^ ERROR E0038 + t + //[object_safe_for_dispatch]~^ ERROR E0038 +} + +fn make_bar_explicit<T:Bar>(t: &T) -> &dyn Bar { + //[curr]~^ ERROR E0038 + t as &dyn Bar + //[object_safe_for_dispatch]~^ ERROR E0038 +} + +fn make_quux<T:Quux>(t: &T) -> &dyn Quux { + t +} + +fn make_quux_explicit<T:Quux>(t: &T) -> &dyn Quux { + t as &dyn Quux +} + +fn main() { +} |