1 // RUN: %clang_cc1 -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -verify -Wno-objc-root-class %s 2 3 extern void clang_analyzer_warnIfReached(); 4 void clang_analyzer_eval(int); 5 6 @interface SomeClass 7 -(id)someMethodWithReturn; 8 -(void)someMethod; 9 @end 10 11 void consistencyOfReturnWithNilReceiver(SomeClass *o) { 12 id result = [o someMethodWithReturn]; 13 if (result) { 14 if (!o) { 15 // It is impossible for both o to be nil and result to be non-nil, 16 // so this should not be reached. 17 clang_analyzer_warnIfReached(); // no-warning 18 } 19 } 20 } 21 22 void maybeNilReceiverIsNotNilAfterMessage(SomeClass *o) { 23 [o someMethod]; 24 25 // We intentionally drop the nil flow (losing coverage) after a method 26 // call when the receiver may be nil in order to avoid inconsistencies of 27 // the kind tested for in consistencyOfReturnWithNilReceiver(). 28 clang_analyzer_eval(o != 0); // expected-warning{{TRUE}} 29 } 30 31 void nilReceiverIsStillNilAfterMessage(SomeClass *o) { 32 if (o == 0) { 33 id result = [o someMethodWithReturn]; 34 35 // Both the receiver and the result should be nil after a message 36 // sent to a nil receiver returning a value of type id. 37 clang_analyzer_eval(o == 0); // expected-warning{{TRUE}} 38 clang_analyzer_eval(result == 0); // expected-warning{{TRUE}} 39 } 40 } 41
