diff options
Diffstat (limited to 'tests/ui/borrowck/borrowck-object-lifetime.rs')
-rw-r--r-- | tests/ui/borrowck/borrowck-object-lifetime.rs | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-object-lifetime.rs b/tests/ui/borrowck/borrowck-object-lifetime.rs new file mode 100644 index 000000000..137a9adbc --- /dev/null +++ b/tests/ui/borrowck/borrowck-object-lifetime.rs @@ -0,0 +1,40 @@ +// Test that borrows that occur due to calls to object methods +// properly "claim" the object path. + + + +trait Foo { + fn borrowed(&self) -> &(); + fn mut_borrowed(&mut self) -> &(); +} + +fn borrowed_receiver(x: &dyn Foo) { + let y = x.borrowed(); + let z = x.borrowed(); + z.use_ref(); + y.use_ref(); +} + +fn mut_borrowed_receiver(x: &mut dyn Foo) { + let y = x.borrowed(); + let z = x.mut_borrowed(); //~ ERROR cannot borrow + y.use_ref(); +} + +fn mut_owned_receiver(mut x: Box<dyn Foo>) { + let y = x.borrowed(); + let z = &mut x; //~ ERROR cannot borrow + y.use_ref(); +} + +fn imm_owned_receiver(mut x: Box<dyn Foo>) { + let y = x.borrowed(); + let z = &x; + z.use_ref(); + y.use_ref(); +} + +fn main() {} + +trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } } +impl<T> Fake for T { } |