public void resolvePropertyInitializer(
@NotNull DataFlowInfo outerDataFlowInfo,
@NotNull JetProperty property,
@NotNull PropertyDescriptor propertyDescriptor,
@NotNull JetExpression initializer,
@NotNull LexicalScope scope) {
LexicalScope propertyDeclarationInnerScope =
JetScopeUtils.getPropertyDeclarationInnerScopeForInitializer(
propertyDescriptor, scope, propertyDescriptor.getTypeParameters(), null, trace);
JetType expectedTypeForInitializer =
property.getTypeReference() != null ? propertyDescriptor.getType() : NO_EXPECTED_TYPE;
if (propertyDescriptor.getCompileTimeInitializer() == null) {
expressionTypingServices.getType(
propertyDeclarationInnerScope,
initializer,
expectedTypeForInitializer,
outerDataFlowInfo,
trace);
}
}
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));
}
}
}