62 lines
1.2 KiB

/*
* Copyright (c) 2015 - 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/Foundation.h>
@interface MyBlock : NSObject
@end
@implementation MyBlock
- (void)array {
NSArray* a = [[NSArray alloc] init];
[a enumerateObjectsUsingBlock:^(id object, NSUInteger idx, BOOL* stop) {
int ShouldStop;
/*
... do something here...
*/
if (ShouldStop) {
*stop = YES;
};
}];
}
- (void)array_trans {
NSArray* a = [[NSArray alloc] init];
NSArray* objects = a;
// The call to the iterator in the above function is translated as:
void (^enumerateObjectsUsingBlock)(id, NSUInteger, BOOL*) =
^(id object, NSUInteger idx, BOOL* stop) {
int ShouldStop;
if (ShouldStop) {
*stop = YES;
};
};
BOOL* stop = malloc(sizeof(BOOL));
*stop = NO;
for (NSUInteger idx = 0; idx < objects.count; idx++) {
id object = objects[idx];
enumerateObjectsUsingBlock(object, idx, stop);
if (*stop == YES)
break;
}
free(stop);
}
@end