src/test/compile-fail/borrowck-object-lifetime.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Test that borrows that occur due to calls to object methods
  12 // properly "claim" the object path.
  13
  14 trait Foo {
  15     fn borrowed(&self) -> &();
  16     fn mut_borrowed(&mut self) -> &();
  17 }
  18
  19 fn borrowed_receiver(x: &Foo) {
  20     let _y = x.borrowed();
  21     let _z = x.borrowed();
  22 }
  23
  24 fn mut_borrowed_receiver(x: &mut Foo) {
  25     let _y = x.borrowed();
  26     let _z = x.mut_borrowed(); //~ ERROR cannot borrow
  27 }
  28
  29 fn mut_owned_receiver(mut x: Box<Foo>) {
  30     let _y = x.borrowed();
  31     let _z = &mut x; //~ ERROR cannot borrow
  32 }
  33
  34 fn imm_owned_receiver(mut x: Box<Foo>) {
  35     let _y = x.borrowed();
  36     let _z = &x;
  37 }
  38
  39 fn main() {}
  40