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|
// Test `@` patterns combined with `box` patterns.
#![feature(box_patterns)]
#[derive(Copy, Clone)]
struct C;
fn c() -> C {
C
}
struct NC;
fn nc() -> NC {
NC
}
fn main() {
let a @ box &b = Box::new(&C);
let a @ box b = Box::new(C);
fn f1(a @ box &b: Box<&C>) {}
fn f2(a @ box b: Box<C>) {}
match Box::new(C) {
a @ box b => {}
}
let ref a @ box b = Box::new(NC); //~ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
let ref a @ box ref mut b = Box::new(nc());
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
let ref a @ box ref mut b = Box::new(NC);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
let ref a @ box ref mut b = Box::new(NC);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = NC;
let ref a @ box ref mut b = Box::new(NC);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = NC;
drop(a);
let ref mut a @ box ref b = Box::new(NC);
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
fn f5(ref mut a @ box ref b: Box<NC>) {
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
}
match Box::new(nc()) {
ref mut a @ box ref b => {
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
}
}
}
|
