llvm-project/clang/test/SemaObjC/warn-implicit-atomic-property.m

// RUN: %clang_cc1 -fsyntax-only -Wimplicit-atomic-properties -fobjc-default-synthesize-properties -verify %s
// rdar://8774580

@interface Super
@property (nonatomic, readwrite) int P; // OK
@property (atomic, readwrite) int P1; // OK
@property (readwrite) int P2; // expected-note {{property declared here}}
@property int P3; // expected-note {{property declared here}}
@end

@implementation Super // expected-warning {{property is assumed atomic when auto-synthesizing the property [-Wimplicit-atomic-properties]}}
@synthesize P,P1,P2; // expected-warning {{property is assumed atomic by default [-Wimplicit-atomic-properties]}}
@end