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