mirror of https://github.com/rust-lang/rust
41 lines
817 B
Rust
41 lines
817 B
Rust
// Test that borrows that occur due to calls to object methods
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// properly "claim" the object path.
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trait Foo {
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fn borrowed(&self) -> &();
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fn mut_borrowed(&mut self) -> &();
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}
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fn borrowed_receiver(x: &dyn Foo) {
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let y = x.borrowed();
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let z = x.borrowed();
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z.use_ref();
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y.use_ref();
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}
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fn mut_borrowed_receiver(x: &mut dyn Foo) {
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let y = x.borrowed();
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let z = x.mut_borrowed(); //~ ERROR cannot borrow
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y.use_ref();
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}
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fn mut_owned_receiver(mut x: Box<dyn Foo>) {
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let y = x.borrowed();
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let z = &mut x; //~ ERROR cannot borrow
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y.use_ref();
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}
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fn imm_owned_receiver(mut x: Box<dyn Foo>) {
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let y = x.borrowed();
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let z = &x;
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z.use_ref();
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y.use_ref();
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}
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fn main() {}
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trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
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impl<T> Fake for T { }
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