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88 lines
2.4 KiB
88 lines
2.4 KiB
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/Foundation.h>
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@interface B : NSObject
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@end
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@interface ArrayUtils : NSObject
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+ (void)enumerate:(void (^)(id obj, NSUInteger idx, BOOL* stop))block;
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@end
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@interface A : NSObject
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- (NSMutableArray*)allResultsList:(NSArray<B*>*)allResults;
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- (B*)process:(B*)obj;
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@end
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@implementation A {
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int x;
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}
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- (B*)process:(B*)obj {
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return obj;
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}
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- (NSMutableArray<B*>*)weak_in_noescape_block_bad:(NSArray<B*>*)allResults {
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NSMutableArray<B*>* resultsList = [[NSMutableArray<B*> alloc] init];
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__weak __typeof(self) weakSelf = self;
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[allResults enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL* stop) {
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B* result = [weakSelf process:obj]; // bug
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B* result1 = [weakSelf process:obj]; // no bug because of dedup
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if (result != nil) {
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[resultsList addObject:result];
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}
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}];
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return resultsList;
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}
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- (NSMutableArray<B*>*)weak_in_noescape_block_good:(NSArray<B*>*)allResults {
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NSMutableArray<B*>* resultsList = [[NSMutableArray<B*> alloc] init];
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[allResults enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL* stop) {
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B* result = [self process:obj]; // no bug
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if (result != nil) {
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[resultsList addObject:result];
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}
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}];
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return resultsList;
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}
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- (NSMutableArray<B*>*)weak_in_noescape_block1_good:(NSArray<B*>*)allResults {
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NSMutableArray<B*>* resultsList = [[NSMutableArray<B*> alloc] init];
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__weak __typeof(self) weakSelf = self;
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[ArrayUtils enumerate:^(id obj, NSUInteger idx, BOOL* stop) {
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B* result = [weakSelf process:obj]; // no bug
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if (result != nil) {
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[resultsList addObject:result];
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}
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}];
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return resultsList;
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}
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- (NSMutableArray<B*>*)weak_in_block_inside_noescape_block_good:
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(NSArray<B*>*)allResults {
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NSMutableArray<B*>* resultsList = [[NSMutableArray alloc] init];
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__weak __typeof(self) weakSelf = self;
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[allResults enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL* stop) {
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B* result = [self process:obj];
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if (result != nil) {
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[resultsList addObject:result];
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}
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}];
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[ArrayUtils enumerate:^(id obj, NSUInteger idx, BOOL* stop) {
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__strong __typeof(weakSelf) strongSelf = weakSelf; // no bug here
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if (strongSelf) {
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int x = strongSelf->x;
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}
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}];
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return resultsList;
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}
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@end
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