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149 lines
3.4 KiB
Rust
149 lines
3.4 KiB
Rust
// Test that `Box<T>` is treated specially by borrow checking. This is the case
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// because NLL reverted the deicision in rust-lang/rfcs#130.
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//@ run-pass
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struct A {
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x: Box<isize>,
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y: isize,
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}
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struct B {
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x: Box<isize>,
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y: Box<isize>,
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}
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struct C {
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x: Box<A>,
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y: isize,
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}
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struct D {
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x: Box<A>,
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y: Box<isize>,
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}
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fn copy_after_move() {
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let a: Box<_> = Box::new(A { x: Box::new(0), y: 1 });
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let _x = a.x;
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let _y = a.y;
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}
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fn move_after_move() {
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let a: Box<_> = Box::new(B { x: Box::new(0), y: Box::new(1) });
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let _x = a.x;
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let _y = a.y;
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}
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fn borrow_after_move() {
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let a: Box<_> = Box::new(A { x: Box::new(0), y: 1 });
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let _x = a.x;
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let _y = &a.y;
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}
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fn move_after_borrow() {
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let a: Box<_> = Box::new(B { x: Box::new(0), y: Box::new(1) });
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let _x = &a.x;
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let _y = a.y;
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use_imm(_x);
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}
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fn copy_after_mut_borrow() {
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let mut a: Box<_> = Box::new(A { x: Box::new(0), y: 1 });
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let _x = &mut a.x;
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let _y = a.y;
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use_mut(_x);
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}
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fn move_after_mut_borrow() {
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let mut a: Box<_> = Box::new(B { x: Box::new(0), y: Box::new(1) });
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let _x = &mut a.x;
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let _y = a.y;
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use_mut(_x);
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}
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fn borrow_after_mut_borrow() {
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let mut a: Box<_> = Box::new(A { x: Box::new(0), y: 1 });
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let _x = &mut a.x;
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let _y = &a.y;
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use_mut(_x);
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}
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fn mut_borrow_after_borrow() {
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let mut a: Box<_> = Box::new(A { x: Box::new(0), y: 1 });
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let _x = &a.x;
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let _y = &mut a.y;
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use_imm(_x);
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}
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fn copy_after_move_nested() {
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let a: Box<_> = Box::new(C { x: Box::new(A { x: Box::new(0), y: 1 }), y: 2 });
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let _x = a.x.x;
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let _y = a.y;
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}
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fn move_after_move_nested() {
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let a: Box<_> = Box::new(D { x: Box::new(A { x: Box::new(0), y: 1 }), y: Box::new(2) });
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let _x = a.x.x;
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let _y = a.y;
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}
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fn borrow_after_move_nested() {
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let a: Box<_> = Box::new(C { x: Box::new(A { x: Box::new(0), y: 1 }), y: 2 });
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let _x = a.x.x;
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let _y = &a.y;
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}
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fn move_after_borrow_nested() {
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let a: Box<_> = Box::new(D { x: Box::new(A { x: Box::new(0), y: 1 }), y: Box::new(2) });
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let _x = &a.x.x;
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let _y = a.y;
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use_imm(_x);
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}
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fn copy_after_mut_borrow_nested() {
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let mut a: Box<_> = Box::new(C { x: Box::new(A { x: Box::new(0), y: 1 }), y: 2 });
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let _x = &mut a.x.x;
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let _y = a.y;
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use_mut(_x);
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}
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fn move_after_mut_borrow_nested() {
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let mut a: Box<_> = Box::new(D { x: Box::new(A { x: Box::new(0), y: 1 }), y: Box::new(2) });
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let _x = &mut a.x.x;
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let _y = a.y;
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use_mut(_x);
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}
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fn borrow_after_mut_borrow_nested() {
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let mut a: Box<_> = Box::new(C { x: Box::new(A { x: Box::new(0), y: 1 }), y: 2 });
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let _x = &mut a.x.x;
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let _y = &a.y;
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use_mut(_x);
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}
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fn mut_borrow_after_borrow_nested() {
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let mut a: Box<_> = Box::new(C { x: Box::new(A { x: Box::new(0), y: 1 }), y: 2 });
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let _x = &a.x.x;
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let _y = &mut a.y;
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use_imm(_x);
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}
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fn main() {
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copy_after_move();
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move_after_move();
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borrow_after_move();
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move_after_borrow();
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copy_after_mut_borrow();
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move_after_mut_borrow();
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borrow_after_mut_borrow();
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mut_borrow_after_borrow();
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copy_after_move_nested();
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move_after_move_nested();
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borrow_after_move_nested();
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move_after_borrow_nested();
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copy_after_mut_borrow_nested();
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move_after_mut_borrow_nested();
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borrow_after_mut_borrow_nested();
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mut_borrow_after_borrow_nested();
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}
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fn use_mut<T>(_: &mut T) { }
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fn use_imm<T>(_: &T) { }
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