1export fn foo() void {
 2    var ptr = &[_]u8{ 0, 0, 0, 0 };
 3    ptr[1] = 2;
 4}
 5export fn bar() void {
 6    var ptr = &@as(u32, 2);
 7    ptr.* = 2;
 8    _ = &ptr;
 9}
10export fn baz() void {
11    var ptr = &true;
12    ptr.* = false;
13    _ = &ptr;
14}
15export fn qux() void {
16    const S = struct {
17        x: usize,
18        y: usize,
19    };
20    var ptr = &S{ .x = 1, .y = 2 };
21    ptr.x = 2;
22}
23export fn quux() void {
24    var x = &@returnAddress();
25    x.* = 6;
26    _ = &x;
27}
28
29// error
30//
31// :3:8: error: cannot assign to constant
32// :7:8: error: cannot assign to constant
33// :12:8: error: cannot assign to constant
34// :21:8: error: cannot assign to constant
35// :25:6: error: cannot assign to constant