mirror of https://github.com/rust-lang/rust
69 lines
1.3 KiB
Rust
69 lines
1.3 KiB
Rust
// Test that move restrictions are enforced on overloaded binary operations
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use std::ops::Add;
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fn double_move<T: Add<Output=()>>(x: T) {
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x
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+
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x; //~ ERROR: use of moved value
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}
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fn move_then_borrow<T: Add<Output=()> + Clone>(x: T) {
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x
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+
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x.clone(); //~ ERROR: borrow of moved value
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}
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fn move_borrowed<T: Add<Output=()>>(x: T, mut y: T) {
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let m = &x;
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let n = &mut y;
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x //~ ERROR: cannot move out of `x` because it is borrowed
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+
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y; //~ ERROR: cannot move out of `y` because it is borrowed
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use_mut(n); use_imm(m);
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}
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fn illegal_dereference<T: Add<Output=()>>(mut x: T, y: T) {
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let m = &mut x;
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let n = &y;
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*m //~ ERROR: cannot move
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+
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*n; //~ ERROR: cannot move
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use_imm(n); use_mut(m);
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}
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struct Foo;
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impl<'a, 'b> Add<&'b Foo> for &'a mut Foo {
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type Output = ();
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fn add(self, _: &Foo) {}
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}
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impl<'a, 'b> Add<&'b mut Foo> for &'a Foo {
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type Output = ();
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fn add(self, _: &mut Foo) {}
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}
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fn mut_plus_immut() {
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let mut f = Foo;
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&mut f
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+
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&f; //~ ERROR: cannot borrow `f` as immutable because it is also borrowed as mutable
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}
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fn immut_plus_mut() {
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let mut f = Foo;
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&f
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+
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&mut f; //~ ERROR: cannot borrow `f` as mutable because it is also borrowed as immutable
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}
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fn main() {}
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fn use_mut<T>(_: &mut T) { }
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fn use_imm<T>(_: &T) { }
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