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1// RUN: %clang_cc1 -std=gnu++17 -verify %s2 3// expected-no-diagnostics4 5typedef const struct __CFString * CFStringRef;6 7extern "C" {8 typedef const struct __attribute__((objc_bridge(NSString))) __CFString * CFStringRef;9 typedef struct __attribute__((objc_bridge_mutable(NSMutableString))) __CFString * CFMutableStringRef;10}11 12@interface NSString @end13@interface NSMutableString : NSString @end14 15void CFStringGetLength(CFStringRef theString);16 17int main() {18 CFStringGetLength((__bridge CFStringRef)(NSString *)0);19}20