/*
 * Copyright (c) 2016 - present Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#import<Foundation/NSObject.h>
#include <dispatch/dispatch.h>

@interface A : NSObject
- (int) foo: (int &) y;
@end

@implementation A

- (int) foo: (int &) y
{
    dispatch_async(dispatch_get_main_queue(), ^{
        int a = y; // Error
        return ;
    });
    return 1;
}

- (int) foo2: (int &) y
{
    const int copied_y = y;
    dispatch_async(dispatch_get_main_queue(), ^{
        int a = copied_y; // OK
        return ;
    });
    return 1;
}

- (int) foo3: (int &) y param2: (int &) z
{
    dispatch_async(dispatch_get_main_queue(), ^{
        int a = y; // Error
        int b = z; // Error
        return ;
    });
    return 1;
}


@end