private void resolveProperty(
@NotNull BodiesResolveContext c,
@Nullable LexicalScope parentScope,
@NotNull JetProperty property,
@NotNull PropertyDescriptor propertyDescriptor) {
computeDeferredType(propertyDescriptor.getReturnType());
JetExpression initializer = property.getInitializer();
LexicalScope propertyScope = getScopeForProperty(c, property);
if (parentScope == null) {
parentScope = propertyScope;
}
if (initializer != null) {
resolvePropertyInitializer(
c.getOuterDataFlowInfo(), property, propertyDescriptor, initializer, propertyScope);
}
JetExpression delegateExpression = property.getDelegateExpression();
if (delegateExpression != null) {
assert initializer == null
: "Initializer should be null for delegated property : " + property.getText();
resolvePropertyDelegate(
c.getOuterDataFlowInfo(),
property,
propertyDescriptor,
delegateExpression,
parentScope,
propertyScope);
}
resolvePropertyAccessors(c, property, propertyDescriptor);
}
private void checkPropertyAbstractness(
@NotNull JetProperty property,
@NotNull PropertyDescriptor propertyDescriptor,
@NotNull ClassDescriptor classDescriptor) {
JetPropertyAccessor getter = property.getGetter();
JetPropertyAccessor setter = property.getSetter();
JetModifierList modifierList = property.getModifierList();
ASTNode abstractNode =
modifierList != null ? modifierList.getModifierNode(JetTokens.ABSTRACT_KEYWORD) : null;
if (abstractNode != null) { // has abstract modifier
if (!classCanHaveAbstractMembers(classDescriptor)) {
String name = property.getName();
trace.report(
ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS.on(
property, name != null ? name : "", classDescriptor));
return;
}
if (classDescriptor.getKind() == ClassKind.INTERFACE) {
trace.report(ABSTRACT_MODIFIER_IN_TRAIT.on(property));
}
}
if (propertyDescriptor.getModality() == Modality.ABSTRACT) {
JetExpression initializer = property.getInitializer();
if (initializer != null) {
trace.report(ABSTRACT_PROPERTY_WITH_INITIALIZER.on(initializer));
}
JetPropertyDelegate delegate = property.getDelegate();
if (delegate != null) {
trace.report(ABSTRACT_DELEGATED_PROPERTY.on(delegate));
}
if (getter != null && getter.hasBody()) {
trace.report(ABSTRACT_PROPERTY_WITH_GETTER.on(getter));
}
if (setter != null && setter.hasBody()) {
trace.report(ABSTRACT_PROPERTY_WITH_SETTER.on(setter));
}
}
}
private void checkPropertyInitializer(
@NotNull JetProperty property, @NotNull PropertyDescriptor propertyDescriptor) {
JetPropertyAccessor getter = property.getGetter();
JetPropertyAccessor setter = property.getSetter();
boolean hasAccessorImplementation =
(getter != null && getter.hasBody()) || (setter != null && setter.hasBody());
if (propertyDescriptor.getModality() == Modality.ABSTRACT) {
if (!property.hasDelegateExpressionOrInitializer() && property.getTypeReference() == null) {
trace.report(PROPERTY_WITH_NO_TYPE_NO_INITIALIZER.on(property));
}
return;
}
DeclarationDescriptor containingDeclaration = propertyDescriptor.getContainingDeclaration();
boolean inTrait =
containingDeclaration instanceof ClassDescriptor
&& ((ClassDescriptor) containingDeclaration).getKind() == ClassKind.INTERFACE;
JetExpression initializer = property.getInitializer();
JetPropertyDelegate delegate = property.getDelegate();
boolean backingFieldRequired =
Boolean.TRUE.equals(
trace
.getBindingContext()
.get(BindingContext.BACKING_FIELD_REQUIRED, propertyDescriptor));
if (inTrait && backingFieldRequired && hasAccessorImplementation) {
trace.report(BACKING_FIELD_IN_TRAIT.on(property));
}
if (initializer == null && delegate == null) {
boolean error = false;
if (backingFieldRequired
&& !inTrait
&& Boolean.TRUE.equals(
trace.getBindingContext().get(BindingContext.IS_UNINITIALIZED, propertyDescriptor))) {
if (!(containingDeclaration instanceof ClassDescriptor) || hasAccessorImplementation) {
error = true;
trace.report(MUST_BE_INITIALIZED.on(property));
} else {
error = true;
trace.report(MUST_BE_INITIALIZED_OR_BE_ABSTRACT.on(property));
}
}
if (!error && property.getTypeReference() == null) {
trace.report(PROPERTY_WITH_NO_TYPE_NO_INITIALIZER.on(property));
}
if (inTrait && property.hasModifier(JetTokens.FINAL_KEYWORD) && backingFieldRequired) {
trace.report(FINAL_PROPERTY_IN_TRAIT.on(property));
}
return;
}
if (inTrait) {
if (delegate != null) {
trace.report(DELEGATED_PROPERTY_IN_TRAIT.on(delegate));
} else {
trace.report(PROPERTY_INITIALIZER_IN_TRAIT.on(initializer));
}
} else if (delegate == null) {
if (!backingFieldRequired) {
trace.report(PROPERTY_INITIALIZER_NO_BACKING_FIELD.on(initializer));
} else if (property.getReceiverTypeReference() != null) {
trace.report(EXTENSION_PROPERTY_WITH_BACKING_FIELD.on(initializer));
}
}
}
@NotNull
@Override
protected List<IntentionAction> doCreateActions(@NotNull Diagnostic diagnostic) {
List<IntentionAction> actions = new LinkedList<IntentionAction>();
BindingContext context = ResolutionUtils.analyzeFully((JetFile) diagnostic.getPsiFile());
PsiElement diagnosticElement = diagnostic.getPsiElement();
if (!(diagnosticElement instanceof JetExpression)) {
LOG.error("Unexpected element: " + diagnosticElement.getText());
return Collections.emptyList();
}
JetExpression expression = (JetExpression) diagnosticElement;
JetType expectedType;
JetType expressionType;
if (diagnostic.getFactory() == Errors.TYPE_MISMATCH) {
DiagnosticWithParameters2<JetExpression, JetType, JetType> diagnosticWithParameters =
Errors.TYPE_MISMATCH.cast(diagnostic);
expectedType = diagnosticWithParameters.getA();
expressionType = diagnosticWithParameters.getB();
} else if (diagnostic.getFactory() == Errors.NULL_FOR_NONNULL_TYPE) {
DiagnosticWithParameters1<JetConstantExpression, JetType> diagnosticWithParameters =
Errors.NULL_FOR_NONNULL_TYPE.cast(diagnostic);
expectedType = diagnosticWithParameters.getA();
expressionType = TypeUtilsKt.makeNullable(expectedType);
} else if (diagnostic.getFactory() == Errors.CONSTANT_EXPECTED_TYPE_MISMATCH) {
DiagnosticWithParameters2<JetConstantExpression, String, JetType> diagnosticWithParameters =
Errors.CONSTANT_EXPECTED_TYPE_MISMATCH.cast(diagnostic);
expectedType = diagnosticWithParameters.getB();
expressionType = context.getType(expression);
if (expressionType == null) {
LOG.error("No type inferred: " + expression.getText());
return Collections.emptyList();
}
} else {
LOG.error("Unexpected diagnostic: " + DefaultErrorMessages.render(diagnostic));
return Collections.emptyList();
}
// We don't want to cast a cast or type-asserted expression:
if (!(expression instanceof JetBinaryExpressionWithTypeRHS)
&& !(expression.getParent() instanceof JetBinaryExpressionWithTypeRHS)) {
actions.add(new CastExpressionFix(expression, expectedType));
}
// Property initializer type mismatch property type:
JetProperty property = PsiTreeUtil.getParentOfType(expression, JetProperty.class);
if (property != null) {
JetPropertyAccessor getter = property.getGetter();
JetExpression initializer = property.getInitializer();
if (QuickFixUtil.canEvaluateTo(initializer, expression)
|| (getter != null
&& QuickFixUtil.canFunctionOrGetterReturnExpression(
property.getGetter(), expression))) {
LexicalScope scope =
CorePackage.getResolutionScope(
property, context, ResolutionUtils.getResolutionFacade(property));
JetType typeToInsert =
TypeUtils.approximateWithResolvableType(expressionType, scope, false);
actions.add(new ChangeVariableTypeFix(property, typeToInsert));
}
}
PsiElement expressionParent = expression.getParent();
// Mismatch in returned expression:
JetCallableDeclaration function =
expressionParent instanceof JetReturnExpression
? BindingContextUtilPackage.getTargetFunction(
(JetReturnExpression) expressionParent, context)
: PsiTreeUtil.getParentOfType(expression, JetFunction.class, true);
if (function instanceof JetFunction
&& QuickFixUtil.canFunctionOrGetterReturnExpression(function, expression)) {
LexicalScope scope =
CorePackage.getResolutionScope(
function, context, ResolutionUtils.getResolutionFacade(function));
JetType typeToInsert = TypeUtils.approximateWithResolvableType(expressionType, scope, false);
actions.add(new ChangeFunctionReturnTypeFix((JetFunction) function, typeToInsert));
}
// Fixing overloaded operators:
if (expression instanceof JetOperationExpression) {
ResolvedCall<?> resolvedCall = CallUtilPackage.getResolvedCall(expression, context);
if (resolvedCall != null) {
JetFunction declaration = getFunctionDeclaration(resolvedCall);
if (declaration != null) {
actions.add(new ChangeFunctionReturnTypeFix(declaration, expectedType));
}
}
}
// Change function return type when TYPE_MISMATCH is reported on call expression:
if (expression instanceof JetCallExpression) {
ResolvedCall<?> resolvedCall = CallUtilPackage.getResolvedCall(expression, context);
if (resolvedCall != null) {
JetFunction declaration = getFunctionDeclaration(resolvedCall);
if (declaration != null) {
actions.add(new ChangeFunctionReturnTypeFix(declaration, expectedType));
}
}
}
ResolvedCall<? extends CallableDescriptor> resolvedCall =
CallUtilPackage.getParentResolvedCall(expression, context, true);
if (resolvedCall != null) {
// to fix 'type mismatch' on 'if' branches
// todo: the same with 'when'
JetExpression parentIf = QuickFixUtil.getParentIfForBranch(expression);
JetExpression argumentExpression = (parentIf != null) ? parentIf : expression;
ValueArgument valueArgument =
CallUtilPackage.getValueArgumentForExpression(resolvedCall.getCall(), argumentExpression);
if (valueArgument != null) {
JetParameter correspondingParameter =
QuickFixUtil.getParameterDeclarationForValueArgument(resolvedCall, valueArgument);
JetType valueArgumentType =
diagnostic.getFactory() == Errors.NULL_FOR_NONNULL_TYPE
? expressionType
: context.getType(valueArgument.getArgumentExpression());
if (correspondingParameter != null && valueArgumentType != null) {
JetCallableDeclaration callable =
PsiTreeUtil.getParentOfType(
correspondingParameter, JetCallableDeclaration.class, true);
LexicalScope scope =
callable != null
? CorePackage.getResolutionScope(
callable, context, ResolutionUtils.getResolutionFacade(callable))
: null;
JetType typeToInsert =
TypeUtils.approximateWithResolvableType(valueArgumentType, scope, true);
actions.add(new ChangeParameterTypeFix(correspondingParameter, typeToInsert));
}
}
}
return actions;
}