rust/src/test/compile-fail/borrowck/borrowck-reborrow-from-mut.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

struct Foo {
  bar1: Bar,
  bar2: Bar
}

struct Bar {
  int1: isize,
  int2: isize,
}

fn borrow_same_field_twice_mut_mut(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1;
    let _bar2 = &mut foo.bar1;  //~ ERROR cannot borrow
}

fn borrow_same_field_twice_mut_imm(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1;
    let _bar2 = &foo.bar1;  //~ ERROR cannot borrow
}

fn borrow_same_field_twice_imm_mut(foo: &mut Foo) {
    let _bar1 = &foo.bar1;
    let _bar2 = &mut foo.bar1;  //~ ERROR cannot borrow
}

fn borrow_same_field_twice_imm_imm(foo: &mut Foo) {
    let _bar1 = &foo.bar1;
    let _bar2 = &foo.bar1;
}

fn borrow_both_mut(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1;
    let _bar2 = &mut foo.bar2;
}

fn borrow_both_mut_pattern(foo: &mut Foo) {
    match *foo {
        Foo { bar1: ref mut _bar1, bar2: ref mut _bar2 } => {}
    }
}

fn borrow_var_and_pattern(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1;
    match *foo {
        Foo { bar1: ref mut _bar1, bar2: _ } => {}
        //~^ ERROR cannot borrow
    }
}

fn borrow_mut_and_base_imm(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1.int1;
    let _foo1 = &foo.bar1; //~ ERROR cannot borrow
    let _foo2 = &*foo; //~ ERROR cannot borrow
}

fn borrow_mut_and_base_mut(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1.int1;
    let _foo1 = &mut foo.bar1; //~ ERROR cannot borrow
}

fn borrow_mut_and_base_mut2(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1.int1;
    let _foo2 = &mut *foo; //~ ERROR cannot borrow
}

fn borrow_imm_and_base_mut(foo: &mut Foo) {
    let _bar1 = &foo.bar1.int1;
    let _foo1 = &mut foo.bar1; //~ ERROR cannot borrow
}

fn borrow_imm_and_base_mut2(foo: &mut Foo) {
    let _bar1 = &foo.bar1.int1;
    let _foo2 = &mut *foo; //~ ERROR cannot borrow
}

fn borrow_imm_and_base_imm(foo: &mut Foo) {
    let _bar1 = &foo.bar1.int1;
    let _foo1 = &foo.bar1;
    let _foo2 = &*foo;
}

fn borrow_mut_and_imm(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1;
    let _foo1 = &foo.bar2;
}

fn borrow_mut_from_imm(foo: &Foo) {
    let _bar1 = &mut foo.bar1; //~ ERROR cannot borrow
}

fn borrow_long_path_both_mut(foo: &mut Foo) {
    let _bar1 = &mut foo.bar1.int1;
    let _foo1 = &mut foo.bar2.int2;
}

fn main() {}