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Issue 52164. Include enums and mixins into types of a sealed class.
Bug: https://github.com/dart-lang/sdk/issues/52164 Change-Id: Icd6ac232d6356b7e05995b79e5f7d8b33b88a719 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/298260 Commit-Queue: Konstantin Shcheglov <scheglov@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
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@ -62,7 +62,7 @@ class AnalyzerEnumOperations
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}
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class AnalyzerExhaustivenessCache extends ExhaustivenessCache<DartType,
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ClassElement, EnumElement, FieldElement, DartObject> {
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InterfaceElement, EnumElement, FieldElement, DartObject> {
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final TypeSystemImpl typeSystem;
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AnalyzerExhaustivenessCache(this.typeSystem, LibraryElement enclosingLibrary)
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@ -73,18 +73,18 @@ class AnalyzerExhaustivenessCache extends ExhaustivenessCache<DartType,
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}
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class AnalyzerSealedClassOperations
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implements SealedClassOperations<DartType, ClassElement> {
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implements SealedClassOperations<DartType, InterfaceElement> {
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final TypeSystemImpl _typeSystem;
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AnalyzerSealedClassOperations(this._typeSystem);
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@override
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List<ClassElement> getDirectSubclasses(ClassElement sealedClass) {
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List<ClassElement> subclasses = [];
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List<InterfaceElement> getDirectSubclasses(InterfaceElement sealedClass) {
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List<InterfaceElement> subclasses = [];
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LibraryElement library = sealedClass.library;
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outer:
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for (Element declaration in library.topLevelElements) {
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if (declaration != sealedClass && declaration is ClassElement) {
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if (declaration != sealedClass && declaration is InterfaceElement) {
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bool checkType(InterfaceType? type) {
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if (type?.element == sealedClass) {
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subclasses.add(declaration);
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@ -122,7 +122,7 @@ class AnalyzerSealedClassOperations
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@override
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DartType? getSubclassAsInstanceOf(
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ClassElement subClass, covariant InterfaceType sealedClassType) {
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InterfaceElement subClass, covariant InterfaceType sealedClassType) {
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InterfaceType thisType = subClass.thisType;
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InterfaceType asSealedClass =
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thisType.asInstanceOf(sealedClassType.element)!;
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@ -325,6 +325,86 @@ void f(A x) {
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''');
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}
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test_alwaysExhaustive_sealedClass_implementedByEnum_3at2() async {
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await assertErrorsInCode(r'''
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sealed class A {}
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class B implements A {}
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enum E implements A {
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a, b
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}
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void f(A x) {
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switch (x) {
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case B _:
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case E.a:
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break;
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}
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}
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''', [
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error(CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_STATEMENT, 92, 6),
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]);
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}
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test_alwaysExhaustive_sealedClass_implementedByEnum_3at3() async {
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await assertNoErrorsInCode(r'''
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sealed class A {}
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class B implements A {}
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enum E implements A {
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a, b
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}
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void f(A x) {
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switch (x) {
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case B _:
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case E.a:
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case E.b:
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break;
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}
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}
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''');
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}
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test_alwaysExhaustive_sealedClass_implementedByMixin_2at1() async {
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await assertErrorsInCode(r'''
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sealed class A {}
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class B implements A {}
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mixin M implements A {}
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void f(A x) {
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switch (x) {
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case B _:
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break;
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}
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}
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''', [
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error(CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_STATEMENT, 85, 6),
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]);
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}
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test_alwaysExhaustive_sealedClass_implementedByMixin_2at2() async {
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await assertNoErrorsInCode(r'''
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sealed class A {}
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class B implements A {}
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mixin M implements A {}
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void f(A x) {
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switch (x) {
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case B _:
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case M _:
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break;
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}
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}
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''');
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}
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test_alwaysExhaustive_typeVariable_bound_bool_true() async {
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await assertErrorsInCode(r'''
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void f<T extends bool>(T x) {
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