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| // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-store=region -verify -Wno-objc-root-class %s
extern void clang_analyzer_warnIfReached();
void clang_analyzer_eval(int);
@interface SomeClass
-(id)someMethodWithReturn;
-(void)someMethod;
@end
void consistencyOfReturnWithNilReceiver(SomeClass *o) {
id result = [o someMethodWithReturn];
if (result) {
if (!o) {
// It is impossible for both o to be nil and result to be non-nil,
// so this should not be reached.
clang_analyzer_warnIfReached(); // no-warning
}
}
}
void maybeNilReceiverIsNotNilAfterMessage(SomeClass *o) {
[o someMethod];
// We intentionally drop the nil flow (losing coverage) after a method
// call when the receiver may be nil in order to avoid inconsistencies of
// the kind tested for in consistencyOfReturnWithNilReceiver().
clang_analyzer_eval(o != 0); // expected-warning{{TRUE}}
}
void nilReceiverIsStillNilAfterMessage(SomeClass *o) {
if (o == 0) {
id result = [o someMethodWithReturn];
// Both the receiver and the result should be nil after a message
// sent to a nil receiver returning a value of type id.
clang_analyzer_eval(o == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(result == 0); // expected-warning{{TRUE}}
}
}
|