#import <Foundation/Foundation.m>

@implementation MyViewController

- (void)method1 {
    __weak __typeof(self) weakSelf1 = self;
    __weak typeof(self) weakSelf2 = self;
    __weak MyViewController *weakSelf3 = self;
    NSString *srcStr = [[NSString alloc] initWithBytes:kShaderSource length:sizeof(kShaderSource) encoding:NSASCIIStringEncoding];
}

@end
