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#[derive(Copy, Clone)]
struct A { a: isize, b: isize }
struct B { a: isize, b: Box<isize> }
fn var_copy_after_var_borrow() {
let mut x: isize = 1;
let p = &mut x;
drop(x); //~ ERROR cannot use `x` because it was mutably borrowed
*p = 2;
}
fn var_copy_after_field_borrow() {
let mut x = A { a: 1, b: 2 };
let p = &mut x.a;
drop(x); //~ ERROR cannot use `x` because it was mutably borrowed
*p = 3;
}
fn field_copy_after_var_borrow() {
let mut x = A { a: 1, b: 2 };
let p = &mut x;
drop(x.a); //~ ERROR cannot use `x.a` because it was mutably borrowed
p.a = 3;
}
fn field_copy_after_field_borrow() {
let mut x = A { a: 1, b: 2 };
let p = &mut x.a;
drop(x.a); //~ ERROR cannot use `x.a` because it was mutably borrowed
*p = 3;
}
fn fu_field_copy_after_var_borrow() {
let mut x = A { a: 1, b: 2 };
let p = &mut x;
let y = A { b: 3, .. x }; //~ ERROR cannot use `x.a` because it was mutably borrowed
drop(y);
p.a = 4;
}
fn fu_field_copy_after_field_borrow() {
let mut x = A { a: 1, b: 2 };
let p = &mut x.a;
let y = A { b: 3, .. x }; //~ ERROR cannot use `x.a` because it was mutably borrowed
drop(y);
*p = 4;
}
fn var_deref_after_var_borrow() {
let mut x: Box<isize> = Box::new(1);
let p = &mut x;
drop(*x); //~ ERROR cannot use `*x` because it was mutably borrowed
**p = 2;
}
fn field_deref_after_var_borrow() {
let mut x = B { a: 1, b: Box::new(2) };
let p = &mut x;
drop(*x.b); //~ ERROR cannot use `*x.b` because it was mutably borrowed
p.a = 3;
}
fn field_deref_after_field_borrow() {
let mut x = B { a: 1, b: Box::new(2) };
let p = &mut x.b;
drop(*x.b); //~ ERROR cannot use `*x.b` because it was mutably borrowed
**p = 3;
}
fn main() {
var_copy_after_var_borrow();
var_copy_after_field_borrow();
field_copy_after_var_borrow();
field_copy_after_field_borrow();
fu_field_copy_after_var_borrow();
fu_field_copy_after_field_borrow();
var_deref_after_var_borrow();
field_deref_after_var_borrow();
field_deref_after_field_borrow();
}
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