public static boolean enumEntryAfterEnumMember(@NotNull JetEnumEntry enumEntry) {
PsiElement previous = enumEntry.getPrevSibling();
while (previous != null) {
if (previous instanceof JetEnumEntry) return false;
if (previous instanceof JetDeclaration) return true;
previous = previous.getPrevSibling();
}
return false;
}
@Override
public void visitEnumEntry(@NotNull JetEnumEntry declaration) {
MutableClassDescriptor descriptor =
createClassDescriptorForSingleton(
declaration, JetPsiUtil.safeName(declaration.getName()), ClassKind.ENUM_ENTRY);
owner.addClassifierDescriptor(descriptor);
descriptor.getBuilder().setClassObjectDescriptor(createSyntheticClassObject(descriptor));
}
// Temporary
// Returns true if deprecated constructor is in use, like
// ENTRY: Enum(arguments) instead of
// ENTRY(arguments)
public static boolean enumEntryUsesDeprecatedSuperConstructor(@NotNull JetEnumEntry enumEntry) {
JetInitializerList initializerList = enumEntry.getInitializerList();
if (initializerList == null || initializerList.getInitializers().isEmpty()) return false;
JetTypeReference typeReference = initializerList.getInitializers().get(0).getTypeReference();
if (typeReference == null) return false;
JetUserType userType = (JetUserType) typeReference.getTypeElement();
if (userType == null
|| userType.getReferenceExpression() instanceof JetEnumEntrySuperclassReferenceExpression)
return false;
return true;
}
private void checkEnumEntry(
@NotNull JetEnumEntry enumEntry, @NotNull ClassDescriptor classDescriptor) {
DeclarationDescriptor declaration = classDescriptor.getContainingDeclaration();
assert DescriptorUtils.isEnumClass(declaration)
: "Enum entry should be declared in enum class: " + classDescriptor;
ClassDescriptor enumClass = (ClassDescriptor) declaration;
if (enumEntryUsesDeprecatedSuperConstructor(enumEntry)) {
trace.report(
Errors.ENUM_ENTRY_USES_DEPRECATED_SUPER_CONSTRUCTOR.on(enumEntry, classDescriptor));
}
String neededDelimiter = enumEntryExpectedDelimiter(enumEntry);
if (!neededDelimiter.isEmpty()) {
trace.report(
Errors.ENUM_ENTRY_USES_DEPRECATED_OR_NO_DELIMITER.on(
enumEntry, classDescriptor, neededDelimiter));
}
if (enumEntryAfterEnumMember(enumEntry)) {
trace.report(Errors.ENUM_ENTRY_AFTER_ENUM_MEMBER.on(enumEntry, classDescriptor));
}
List<JetDelegationSpecifier> delegationSpecifiers = enumEntry.getDelegationSpecifiers();
ConstructorDescriptor constructor = enumClass.getUnsubstitutedPrimaryConstructor();
if ((constructor == null || !constructor.getValueParameters().isEmpty())
&& delegationSpecifiers.isEmpty()) {
trace.report(ENUM_ENTRY_SHOULD_BE_INITIALIZED.on(enumEntry, enumClass));
}
for (JetDelegationSpecifier delegationSpecifier : delegationSpecifiers) {
JetTypeReference typeReference = delegationSpecifier.getTypeReference();
if (typeReference != null) {
JetType type = trace.getBindingContext().get(TYPE, typeReference);
if (type != null) {
JetType enumType = enumClass.getDefaultType();
if (!type.getConstructor().equals(enumType.getConstructor())) {
trace.report(ENUM_ENTRY_ILLEGAL_TYPE.on(typeReference, enumClass));
}
}
}
}
}
// Temporary
// Returns comma if it's an enum entry without following comma (entry is not last in enum),
// or semicolon if it's an enum entry without following semicolon, may be after comma (entry is
// last in enum),
// or empty string if an enum entry has the necessary following delimiter
@NotNull
private static String enumEntryExpectedDelimiter(@NotNull JetEnumEntry enumEntry) {
PsiElement next = enumEntry.getNextSibling();
while (next != null) {
if (next instanceof JetDeclaration) break;
next = next.getNextSibling();
}
JetDeclaration nextDeclaration = (JetDeclaration) next;
next = PsiUtilPackage.getNextSiblingIgnoringWhitespaceAndComments(enumEntry);
IElementType nextType = next != null ? next.getNode().getElementType() : null;
if (nextDeclaration instanceof JetEnumEntry) {
// Not last
return nextType != JetTokens.COMMA ? "," : "";
} else {
// Last: after it we can have semicolon, just closing brace, or comma followed by semicolon /
// closing brace
if (nextType == JetTokens.COMMA) {
next = PsiUtilPackage.getNextSiblingIgnoringWhitespaceAndComments(next);
nextType = next != null ? next.getNode().getElementType() : null;
}
return nextType != JetTokens.SEMICOLON && nextType != JetTokens.RBRACE ? ";" : "";
}
}
