@NotNull
public JetType getArrayElementType(@NotNull JetType arrayType) {
if (isArray(arrayType)) {
if (arrayType.getArguments().size() != 1) {
throw new IllegalStateException();
}
return arrayType.getArguments().get(0).getType();
}
JetType primitiveType =
jetArrayTypeToPrimitiveJetType.get(TypeUtils.makeNotNullable(arrayType));
if (primitiveType == null) {
throw new IllegalStateException("not array: " + arrayType);
}
return primitiveType;
}
@Nullable
public static JetType getReceiverType(@NotNull JetType type) {
assert isFunctionOrExtensionFunctionType(type) : type;
if (isExtensionFunctionType(type)) {
return type.getArguments().get(0).getType();
}
return null;
}
private static boolean isTypeConstructorFqNameInSet(
@NotNull JetType type, @NotNull Set<FqNameUnsafe> classes) {
ClassifierDescriptor declarationDescriptor = type.getConstructor().getDeclarationDescriptor();
if (declarationDescriptor == null) return false;
FqNameUnsafe fqName = DescriptorUtils.getFqName(declarationDescriptor);
return classes.contains(fqName);
}
public static boolean isExtensionFunctionType(@NotNull JetType type) {
if (isExactExtensionFunctionType(type)) return true;
for (JetType superType : type.getConstructor().getSupertypes()) {
if (isExtensionFunctionType(superType)) return true;
}
return false;
}
@NotNull
public static List<TypeProjection> getParameterTypeProjectionsFromFunctionType(
@NotNull JetType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> arguments = type.getArguments();
int first = isExtensionFunctionType(type) ? 1 : 0;
int last = arguments.size() - 2;
List<TypeProjection> parameterTypes = new ArrayList<TypeProjection>(last - first + 1);
for (int i = first; i <= last; i++) {
parameterTypes.add(arguments.get(i));
}
return parameterTypes;
}
public static boolean isNullableAny(@NotNull JetType type) {
return isAnyOrNullableAny(type) && type.isMarkedNullable();
}
public static boolean isNullableNothing(@NotNull JetType type) {
return isNothingOrNullableNothing(type) && type.isMarkedNullable();
}
private static boolean isNotNullConstructedFromGivenClass(
@NotNull JetType type, @NotNull FqNameUnsafe fqName) {
return !type.isMarkedNullable() && isConstructedFromGivenClass(type, fqName);
}
private static boolean isConstructedFromGivenClass(
@NotNull JetType type, @NotNull FqNameUnsafe fqName) {
ClassifierDescriptor descriptor = type.getConstructor().getDeclarationDescriptor();
return descriptor != null && fqName.equals(DescriptorUtils.getFqName(descriptor));
}
@NotNull
public static JetType getReturnTypeFromFunctionType(@NotNull JetType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> arguments = type.getArguments();
return arguments.get(arguments.size() - 1).getType();
}
public static boolean isPrimitiveType(@NotNull JetType type) {
ClassifierDescriptor descriptor = type.getConstructor().getDeclarationDescriptor();
return !type.isMarkedNullable()
&& descriptor != null
&& FQ_NAMES.primitiveTypes.contains(DescriptorUtils.getFqName(descriptor));
}
private void checkSupertypeList(
@NotNull ClassDescriptor supertypeOwner,
@NotNull Map<JetTypeReference, JetType> supertypes,
@NotNull JetClassOrObject jetClass) {
Set<TypeConstructor> allowedFinalSupertypes =
getAllowedFinalSupertypes(supertypeOwner, jetClass);
Set<TypeConstructor> typeConstructors = Sets.newHashSet();
boolean classAppeared = false;
for (Map.Entry<JetTypeReference, JetType> entry : supertypes.entrySet()) {
JetTypeReference typeReference = entry.getKey();
JetType supertype = entry.getValue();
boolean addSupertype = true;
ClassDescriptor classDescriptor = TypeUtils.getClassDescriptor(supertype);
if (classDescriptor != null) {
if (ErrorUtils.isError(classDescriptor)) continue;
if (classDescriptor.getKind() != ClassKind.INTERFACE) {
if (supertypeOwner.getKind() == ClassKind.ENUM_CLASS) {
trace.report(CLASS_IN_SUPERTYPE_FOR_ENUM.on(typeReference));
addSupertype = false;
} else if (supertypeOwner.getKind() == ClassKind.INTERFACE
&& !classAppeared
&& !TypesPackage.isDynamic(supertype) /* avoid duplicate diagnostics */) {
trace.report(TRAIT_WITH_SUPERCLASS.on(typeReference));
addSupertype = false;
}
if (classAppeared) {
trace.report(MANY_CLASSES_IN_SUPERTYPE_LIST.on(typeReference));
} else {
classAppeared = true;
}
}
} else {
trace.report(SUPERTYPE_NOT_A_CLASS_OR_TRAIT.on(typeReference));
}
TypeConstructor constructor = supertype.getConstructor();
if (addSupertype && !typeConstructors.add(constructor)) {
trace.report(SUPERTYPE_APPEARS_TWICE.on(typeReference));
}
if (DescriptorUtils.isSingleton(classDescriptor)) {
trace.report(SINGLETON_IN_SUPERTYPE.on(typeReference));
} else if (constructor.isFinal() && !allowedFinalSupertypes.contains(constructor)) {
if (classDescriptor.getModality() == Modality.SEALED) {
DeclarationDescriptor containingDescriptor = supertypeOwner.getContainingDeclaration();
while (containingDescriptor != null && containingDescriptor != classDescriptor) {
containingDescriptor = containingDescriptor.getContainingDeclaration();
}
if (containingDescriptor == null) {
trace.report(SEALED_SUPERTYPE.on(typeReference));
} else {
trace.report(SEALED_SUPERTYPE_IN_LOCAL_CLASS.on(typeReference));
}
} else {
trace.report(FINAL_SUPERTYPE.on(typeReference));
}
}
}
}