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|
static static_x: i32 = 1;
static mut static_x_mut: i32 = 1;
fn main() {
let x = 1;
let mut x_mut = 1;
{
// borrow of local
let _y1 = &mut x; //~ ERROR [E0596]
let _y2 = &mut x_mut; // No error
}
{
// borrow of static
let _y1 = &mut static_x; //~ ERROR [E0596]
unsafe {
let _y2 = &mut static_x_mut;
}
}
{
// borrow of deref to box
let box_x = Box::new(1);
let mut box_x_mut = Box::new(1);
let _y1 = &mut *box_x; //~ ERROR [E0596]
let _y2 = &mut *box_x_mut; // No error
}
{
// borrow of deref to reference
let ref_x = &x;
let ref_x_mut = &mut x_mut;
let _y1 = &mut *ref_x; //~ ERROR [E0596]
let _y2 = &mut *ref_x_mut; // No error
}
{
// borrow of deref to pointer
let ptr_x: *const _ = &x;
let ptr_mut_x: *mut _ = &mut x_mut;
unsafe {
let _y1 = &mut *ptr_x; //~ ERROR [E0596]
let _y2 = &mut *ptr_mut_x; // No error
}
}
{
// borrowing mutably through an immutable reference
struct Foo<'a> {
f: &'a mut i32,
g: &'a i32,
};
let mut foo = Foo { f: &mut x_mut, g: &x };
let foo_ref = &foo;
let _y = &mut *foo_ref.f; //~ ERROR [E0596]
}
}
|
