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org.jetbrains.kotlin.resolve.DescriptorResolver Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.resolve;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.intellij.psi.PsiElement;
import kotlin.Pair;
import kotlin.collections.CollectionsKt;
import kotlin.collections.SetsKt;
import kotlin.jvm.functions.Function0;
import kotlin.jvm.functions.Function1;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
import org.jetbrains.kotlin.descriptors.*;
import org.jetbrains.kotlin.descriptors.annotations.AnnotationSplitter;
import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget;
import org.jetbrains.kotlin.descriptors.annotations.Annotations;
import org.jetbrains.kotlin.descriptors.annotations.CompositeAnnotations;
import org.jetbrains.kotlin.descriptors.impl.*;
import org.jetbrains.kotlin.diagnostics.Errors;
import org.jetbrains.kotlin.incremental.components.NoLookupLocation;
import org.jetbrains.kotlin.lexer.KtTokens;
import org.jetbrains.kotlin.name.FqName;
import org.jetbrains.kotlin.name.Name;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.psi.psiUtil.PsiUtilsKt;
import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo;
import org.jetbrains.kotlin.resolve.dataClassUtils.DataClassUtilsKt;
import org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil;
import org.jetbrains.kotlin.resolve.scopes.LexicalScope;
import org.jetbrains.kotlin.resolve.scopes.LexicalScopeKind;
import org.jetbrains.kotlin.resolve.scopes.LexicalWritableScope;
import org.jetbrains.kotlin.resolve.scopes.ScopeUtils;
import org.jetbrains.kotlin.resolve.scopes.utils.ScopeUtilsKt;
import org.jetbrains.kotlin.resolve.source.KotlinSourceElementKt;
import org.jetbrains.kotlin.storage.StorageManager;
import org.jetbrains.kotlin.types.*;
import org.jetbrains.kotlin.types.checker.KotlinTypeChecker;
import java.util.*;
import static org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget.*;
import static org.jetbrains.kotlin.diagnostics.Errors.*;
import static org.jetbrains.kotlin.lexer.KtTokens.*;
import static org.jetbrains.kotlin.resolve.BindingContext.CONSTRUCTOR;
import static org.jetbrains.kotlin.resolve.BindingContext.PACKAGE_TO_FILES;
import static org.jetbrains.kotlin.resolve.DescriptorUtils.*;
import static org.jetbrains.kotlin.resolve.ModifiersChecker.resolveModalityFromModifiers;
import static org.jetbrains.kotlin.resolve.ModifiersChecker.resolveVisibilityFromModifiers;
public class DescriptorResolver {
public static final Name COPY_METHOD_NAME = Name.identifier("copy");
@NotNull private final TypeResolver typeResolver;
@NotNull private final AnnotationResolver annotationResolver;
@NotNull private final StorageManager storageManager;
@NotNull private final KotlinBuiltIns builtIns;
@NotNull private final SupertypeLoopChecker supertypeLoopsResolver;
@NotNull private final VariableTypeResolver variableTypeResolver;
public DescriptorResolver(
@NotNull AnnotationResolver annotationResolver,
@NotNull KotlinBuiltIns builtIns,
@NotNull StorageManager storageManager,
@NotNull TypeResolver typeResolver,
@NotNull SupertypeLoopChecker supertypeLoopsResolver,
@NotNull VariableTypeResolver variableTypeResolver
) {
this.annotationResolver = annotationResolver;
this.builtIns = builtIns;
this.storageManager = storageManager;
this.typeResolver = typeResolver;
this.supertypeLoopsResolver = supertypeLoopsResolver;
this.variableTypeResolver = variableTypeResolver;
}
public List resolveSupertypes(
@NotNull LexicalScope scope,
@NotNull ClassDescriptor classDescriptor,
@NotNull KtClassOrObject jetClass,
BindingTrace trace
) {
List supertypes = Lists.newArrayList();
List delegationSpecifiers = jetClass.getSuperTypeListEntries();
Collection declaredSupertypes = resolveSuperTypeListEntries(
scope,
delegationSpecifiers,
typeResolver, trace, false);
for (KotlinType declaredSupertype : declaredSupertypes) {
addValidSupertype(supertypes, declaredSupertype);
}
if (classDescriptor.getKind() == ClassKind.ENUM_CLASS && !containsClass(supertypes)) {
supertypes.add(0, builtIns.getEnumType(classDescriptor.getDefaultType()));
}
if (supertypes.isEmpty()) {
KotlinType defaultSupertype = getDefaultSupertype(jetClass, trace, classDescriptor.getKind() == ClassKind.ANNOTATION_CLASS);
addValidSupertype(supertypes, defaultSupertype);
}
return supertypes;
}
private static void addValidSupertype(List supertypes, KotlinType declaredSupertype) {
if (!declaredSupertype.isError()) {
supertypes.add(declaredSupertype);
}
}
private boolean containsClass(Collection result) {
for (KotlinType type : result) {
ClassifierDescriptor descriptor = type.getConstructor().getDeclarationDescriptor();
if (descriptor instanceof ClassDescriptor && ((ClassDescriptor) descriptor).getKind() != ClassKind.INTERFACE) {
return true;
}
}
return false;
}
private KotlinType getDefaultSupertype(KtClassOrObject jetClass, BindingTrace trace, boolean isAnnotation) {
// TODO : beautify
if (jetClass instanceof KtEnumEntry) {
KtClassOrObject parent = KtStubbedPsiUtil.getContainingDeclaration(jetClass, KtClassOrObject.class);
ClassDescriptor parentDescriptor = trace.getBindingContext().get(BindingContext.CLASS, parent);
if (parentDescriptor.getTypeConstructor().getParameters().isEmpty()) {
return parentDescriptor.getDefaultType();
}
else {
trace.report(NO_GENERICS_IN_SUPERTYPE_SPECIFIER.on(jetClass.getNameIdentifier()));
return ErrorUtils.createErrorType("Supertype not specified");
}
}
else if (isAnnotation) {
return builtIns.getAnnotationType();
}
return builtIns.getAnyType();
}
public Collection resolveSuperTypeListEntries(
LexicalScope extensibleScope,
List delegationSpecifiers,
@NotNull TypeResolver resolver,
BindingTrace trace,
boolean checkBounds
) {
if (delegationSpecifiers.isEmpty()) {
return Collections.emptyList();
}
Collection result = Lists.newArrayList();
for (KtSuperTypeListEntry delegationSpecifier : delegationSpecifiers) {
KtTypeReference typeReference = delegationSpecifier.getTypeReference();
if (typeReference != null) {
KotlinType supertype = resolver.resolveType(extensibleScope, typeReference, trace, checkBounds);
if (DynamicTypesKt.isDynamic(supertype)) {
trace.report(DYNAMIC_SUPERTYPE.on(typeReference));
}
else {
result.add(supertype);
KtTypeElement bareSuperType = checkNullableSupertypeAndStripQuestionMarks(trace, typeReference.getTypeElement());
checkProjectionsInImmediateArguments(trace, bareSuperType);
}
}
else {
result.add(ErrorUtils.createErrorType("No type reference"));
}
}
return result;
}
@Nullable
private static KtTypeElement checkNullableSupertypeAndStripQuestionMarks(@NotNull BindingTrace trace, @Nullable KtTypeElement typeElement) {
while (typeElement instanceof KtNullableType) {
KtNullableType nullableType = (KtNullableType) typeElement;
typeElement = nullableType.getInnerType();
// report only for innermost '?', the rest gets a 'redundant' warning
if (!(typeElement instanceof KtNullableType) && typeElement != null) {
trace.report(NULLABLE_SUPERTYPE.on(nullableType));
}
}
return typeElement;
}
private static void checkProjectionsInImmediateArguments(@NotNull BindingTrace trace, @Nullable KtTypeElement typeElement) {
if (typeElement instanceof KtUserType) {
KtUserType userType = (KtUserType) typeElement;
List typeArguments = userType.getTypeArguments();
for (KtTypeProjection typeArgument : typeArguments) {
if (typeArgument.getProjectionKind() != KtProjectionKind.NONE) {
trace.report(PROJECTION_IN_IMMEDIATE_ARGUMENT_TO_SUPERTYPE.on(typeArgument));
}
}
}
}
@NotNull
public static SimpleFunctionDescriptor createComponentFunctionDescriptor(
int parameterIndex,
@NotNull PropertyDescriptor property,
@NotNull ValueParameterDescriptor parameter,
@NotNull ClassDescriptor classDescriptor,
@NotNull BindingTrace trace
) {
Name functionName = DataClassUtilsKt.createComponentName(parameterIndex);
KotlinType returnType = property.getType();
SimpleFunctionDescriptorImpl functionDescriptor = SimpleFunctionDescriptorImpl.create(
classDescriptor,
Annotations.Companion.getEMPTY(),
functionName,
CallableMemberDescriptor.Kind.SYNTHESIZED,
parameter.getSource()
);
functionDescriptor.initialize(
null,
classDescriptor.getThisAsReceiverParameter(),
Collections.emptyList(),
Collections.emptyList(),
returnType,
Modality.FINAL,
property.getVisibility()
);
functionDescriptor.setOperator(true);
trace.record(BindingContext.DATA_CLASS_COMPONENT_FUNCTION, parameter, functionDescriptor);
return functionDescriptor;
}
@NotNull
public static SimpleFunctionDescriptor createCopyFunctionDescriptor(
@NotNull Collection constructorParameters,
@NotNull ClassDescriptor classDescriptor,
@NotNull BindingTrace trace
) {
KotlinType returnType = classDescriptor.getDefaultType();
SimpleFunctionDescriptorImpl functionDescriptor = SimpleFunctionDescriptorImpl.create(
classDescriptor,
Annotations.Companion.getEMPTY(),
COPY_METHOD_NAME,
CallableMemberDescriptor.Kind.SYNTHESIZED,
classDescriptor.getSource()
);
List parameterDescriptors = Lists.newArrayList();
for (ValueParameterDescriptor parameter : constructorParameters) {
PropertyDescriptor propertyDescriptor = trace.getBindingContext().get(BindingContext.VALUE_PARAMETER_AS_PROPERTY, parameter);
// If parameter hasn't corresponding property, so it mustn't have default value as a parameter in copy function for data class
boolean declaresDefaultValue = propertyDescriptor != null;
ValueParameterDescriptorImpl parameterDescriptor =
new ValueParameterDescriptorImpl(functionDescriptor, null, parameter.getIndex(), parameter.getAnnotations(),
parameter.getName(), parameter.getType(),
declaresDefaultValue,
parameter.isCrossinline(),
parameter.isNoinline(),
parameter.getVarargElementType(), parameter.getSource());
parameterDescriptors.add(parameterDescriptor);
if (declaresDefaultValue) {
trace.record(BindingContext.VALUE_PARAMETER_AS_PROPERTY, parameterDescriptor, propertyDescriptor);
}
}
functionDescriptor.initialize(
null,
classDescriptor.getThisAsReceiverParameter(),
Collections.emptyList(),
parameterDescriptors,
returnType,
Modality.FINAL,
Visibilities.PUBLIC
);
trace.record(BindingContext.DATA_CLASS_COPY_FUNCTION, classDescriptor, functionDescriptor);
return functionDescriptor;
}
public static Visibility getDefaultVisibility(KtModifierListOwner modifierListOwner, DeclarationDescriptor containingDescriptor) {
Visibility defaultVisibility;
if (containingDescriptor instanceof ClassDescriptor) {
KtModifierList modifierList = modifierListOwner.getModifierList();
defaultVisibility = modifierList != null && modifierList.hasModifier(OVERRIDE_KEYWORD)
? Visibilities.INHERITED
: Visibilities.DEFAULT_VISIBILITY;
}
else if (containingDescriptor instanceof FunctionDescriptor || containingDescriptor instanceof PropertyDescriptor) {
defaultVisibility = Visibilities.LOCAL;
}
else {
defaultVisibility = Visibilities.DEFAULT_VISIBILITY;
}
return defaultVisibility;
}
public static Modality getDefaultModality(DeclarationDescriptor containingDescriptor, Visibility visibility, boolean isBodyPresent) {
Modality defaultModality;
if (containingDescriptor instanceof ClassDescriptor) {
boolean isTrait = ((ClassDescriptor) containingDescriptor).getKind() == ClassKind.INTERFACE;
boolean isDefinitelyAbstract = isTrait && !isBodyPresent;
Modality basicModality = isTrait && !Visibilities.isPrivate(visibility) ? Modality.OPEN : Modality.FINAL;
defaultModality = isDefinitelyAbstract ? Modality.ABSTRACT : basicModality;
}
else {
defaultModality = Modality.FINAL;
}
return defaultModality;
}
@NotNull
public ValueParameterDescriptorImpl resolveValueParameterDescriptor(
LexicalScope scope, FunctionDescriptor owner, KtParameter valueParameter, int index, KotlinType type, BindingTrace trace
) {
KotlinType varargElementType = null;
KotlinType variableType = type;
if (valueParameter.hasModifier(VARARG_KEYWORD)) {
varargElementType = type;
variableType = getVarargParameterType(type);
}
KtModifierList modifierList = valueParameter.getModifierList();
Annotations allAnnotations =
annotationResolver.resolveAnnotationsWithoutArguments(scope, valueParameter.getModifierList(), trace);
Annotations valueParameterAnnotations = Annotations.Companion.getEMPTY();
if (modifierList != null) {
if (valueParameter.hasValOrVar()) {
AnnotationSplitter annotationSplitter = AnnotationSplitter.create(
storageManager, allAnnotations, SetsKt.setOf(CONSTRUCTOR_PARAMETER));
valueParameterAnnotations = annotationSplitter.getAnnotationsForTarget(CONSTRUCTOR_PARAMETER);
}
else {
valueParameterAnnotations = allAnnotations;
}
}
ValueParameterDescriptorImpl valueParameterDescriptor = new ValueParameterDescriptorImpl(
owner,
null,
index,
valueParameterAnnotations,
KtPsiUtil.safeName(valueParameter.getName()),
variableType,
valueParameter.hasDefaultValue(),
valueParameter.hasModifier(CROSSINLINE_KEYWORD),
valueParameter.hasModifier(NOINLINE_KEYWORD),
varargElementType,
KotlinSourceElementKt.toSourceElement(valueParameter)
);
trace.record(BindingContext.VALUE_PARAMETER, valueParameter, valueParameterDescriptor);
return valueParameterDescriptor;
}
@NotNull
private KotlinType getVarargParameterType(@NotNull KotlinType elementType) {
KotlinType primitiveArrayType = builtIns.getPrimitiveArrayKotlinTypeByPrimitiveKotlinType(elementType);
if (primitiveArrayType != null) {
return primitiveArrayType;
}
return builtIns.getArrayType(Variance.OUT_VARIANCE, elementType);
}
public List resolveTypeParametersForCallableDescriptor(
DeclarationDescriptor containingDescriptor,
LexicalWritableScope extensibleScope,
LexicalScope scopeForAnnotationsResolve,
List typeParameters,
BindingTrace trace
) {
List result = new ArrayList();
for (int i = 0, typeParametersSize = typeParameters.size(); i < typeParametersSize; i++) {
KtTypeParameter typeParameter = typeParameters.get(i);
result.add(resolveTypeParameterForCallableDescriptor(
containingDescriptor, extensibleScope, scopeForAnnotationsResolve, typeParameter, i, trace));
}
return result;
}
private TypeParameterDescriptorImpl resolveTypeParameterForCallableDescriptor(
DeclarationDescriptor containingDescriptor,
LexicalWritableScope extensibleScope,
LexicalScope scopeForAnnotationsResolve,
final KtTypeParameter typeParameter,
int index,
final BindingTrace trace
) {
if (typeParameter.getVariance() != Variance.INVARIANT) {
assert !(containingDescriptor instanceof ClassifierDescriptor) : "This method is intended for functions/properties";
trace.report(VARIANCE_ON_TYPE_PARAMETER_OF_FUNCTION_OR_PROPERTY.on(typeParameter));
}
Annotations annotations =
annotationResolver.resolveAnnotationsWithArguments(scopeForAnnotationsResolve, typeParameter.getModifierList(), trace);
TypeParameterDescriptorImpl typeParameterDescriptor = TypeParameterDescriptorImpl.createForFurtherModification(
containingDescriptor,
annotations,
typeParameter.hasModifier(KtTokens.REIFIED_KEYWORD),
typeParameter.getVariance(),
KtPsiUtil.safeName(typeParameter.getName()),
index,
KotlinSourceElementKt.toSourceElement(typeParameter),
new Function1() {
@Override
public Void invoke(KotlinType type) {
trace.report(Errors.CYCLIC_GENERIC_UPPER_BOUND.on(typeParameter));
return null;
}
},
supertypeLoopsResolver
);
trace.record(BindingContext.TYPE_PARAMETER, typeParameter, typeParameterDescriptor);
extensibleScope.addClassifierDescriptor(typeParameterDescriptor);
return typeParameterDescriptor;
}
@NotNull
public static ConstructorDescriptorImpl createAndRecordPrimaryConstructorForObject(
@Nullable KtClassOrObject object,
@NotNull ClassDescriptor classDescriptor,
@NotNull BindingTrace trace
) {
ConstructorDescriptorImpl constructorDescriptor =
DescriptorFactory.createPrimaryConstructorForObject(classDescriptor, KotlinSourceElementKt.toSourceElement(object));
if (object != null) {
KtPrimaryConstructor primaryConstructor = object.getPrimaryConstructor();
trace.record(CONSTRUCTOR, primaryConstructor != null ? primaryConstructor : object, constructorDescriptor);
}
return constructorDescriptor;
}
static final class UpperBoundCheckRequest {
public final Name typeParameterName;
public final KtTypeReference upperBound;
public final KotlinType upperBoundType;
UpperBoundCheckRequest(Name typeParameterName, KtTypeReference upperBound, KotlinType upperBoundType) {
this.typeParameterName = typeParameterName;
this.upperBound = upperBound;
this.upperBoundType = upperBoundType;
}
}
public void resolveGenericBounds(
@NotNull KtTypeParameterListOwner declaration,
@NotNull DeclarationDescriptor descriptor,
LexicalScope scope,
List parameters,
BindingTrace trace
) {
List upperBoundCheckRequests = Lists.newArrayList();
List typeParameters = declaration.getTypeParameters();
Map parameterByName = Maps.newHashMap();
for (int i = 0; i < typeParameters.size(); i++) {
KtTypeParameter ktTypeParameter = typeParameters.get(i);
TypeParameterDescriptorImpl typeParameterDescriptor = parameters.get(i);
parameterByName.put(typeParameterDescriptor.getName(), typeParameterDescriptor);
KtTypeReference extendsBound = ktTypeParameter.getExtendsBound();
if (extendsBound != null) {
KotlinType type = typeResolver.resolveType(scope, extendsBound, trace, false);
typeParameterDescriptor.addUpperBound(type);
upperBoundCheckRequests.add(new UpperBoundCheckRequest(ktTypeParameter.getNameAsName(), extendsBound, type));
}
}
for (KtTypeConstraint constraint : declaration.getTypeConstraints()) {
KtSimpleNameExpression subjectTypeParameterName = constraint.getSubjectTypeParameterName();
if (subjectTypeParameterName == null) {
continue;
}
Name referencedName = subjectTypeParameterName.getReferencedNameAsName();
TypeParameterDescriptorImpl typeParameterDescriptor = parameterByName.get(referencedName);
KtTypeReference boundTypeReference = constraint.getBoundTypeReference();
KotlinType bound = null;
if (boundTypeReference != null) {
bound = typeResolver.resolveType(scope, boundTypeReference, trace, false);
upperBoundCheckRequests.add(new UpperBoundCheckRequest(referencedName, boundTypeReference, bound));
}
if (typeParameterDescriptor != null) {
trace.record(BindingContext.REFERENCE_TARGET, subjectTypeParameterName, typeParameterDescriptor);
if (bound != null) {
typeParameterDescriptor.addUpperBound(bound);
}
}
}
for (TypeParameterDescriptorImpl parameter : parameters) {
parameter.addDefaultUpperBound();
parameter.setInitialized();
}
for (TypeParameterDescriptorImpl parameter : parameters) {
checkConflictingUpperBounds(trace, parameter, typeParameters.get(parameter.getIndex()));
}
if (!(declaration instanceof KtClass)) {
checkUpperBoundTypes(trace, upperBoundCheckRequests);
checkNamesInConstraints(declaration, descriptor, scope, trace);
}
}
public static void checkUpperBoundTypes(@NotNull BindingTrace trace, @NotNull List requests) {
if (requests.isEmpty()) return;
Set classBoundEncountered = new HashSet();
Set> allBounds = new HashSet>();
for (UpperBoundCheckRequest request : requests) {
Name typeParameterName = request.typeParameterName;
KotlinType upperBound = request.upperBoundType;
KtTypeReference upperBoundElement = request.upperBound;
if (!upperBound.isError()) {
if (!allBounds.add(new Pair(typeParameterName, upperBound.getConstructor()))) {
trace.report(REPEATED_BOUND.on(upperBoundElement));
}
else {
ClassDescriptor classDescriptor = TypeUtils.getClassDescriptor(upperBound);
if (classDescriptor != null) {
ClassKind kind = classDescriptor.getKind();
if (kind == ClassKind.CLASS || kind == ClassKind.ENUM_CLASS || kind == ClassKind.OBJECT) {
if (!classBoundEncountered.add(typeParameterName)) {
trace.report(ONLY_ONE_CLASS_BOUND_ALLOWED.on(upperBoundElement));
}
}
}
}
}
checkUpperBoundType(upperBoundElement, upperBound, trace);
}
}
public static void checkConflictingUpperBounds(
@NotNull BindingTrace trace,
@NotNull TypeParameterDescriptor parameter,
@NotNull KtTypeParameter typeParameter
) {
if (KotlinBuiltIns.isNothing(TypeIntersector.getUpperBoundsAsType(parameter))) {
trace.report(CONFLICTING_UPPER_BOUNDS.on(typeParameter, parameter));
}
}
public void checkNamesInConstraints(
@NotNull KtTypeParameterListOwner declaration,
@NotNull DeclarationDescriptor descriptor,
@NotNull LexicalScope scope,
@NotNull BindingTrace trace
) {
for (KtTypeConstraint constraint : declaration.getTypeConstraints()) {
KtSimpleNameExpression nameExpression = constraint.getSubjectTypeParameterName();
if (nameExpression == null) continue;
Name name = nameExpression.getReferencedNameAsName();
ClassifierDescriptor classifier = ScopeUtilsKt.findClassifier(scope, name, NoLookupLocation.FOR_NON_TRACKED_SCOPE);
if (classifier instanceof TypeParameterDescriptor && classifier.getContainingDeclaration() == descriptor) continue;
if (classifier != null) {
// To tell the user that we look only for locally defined type parameters
trace.report(NAME_IN_CONSTRAINT_IS_NOT_A_TYPE_PARAMETER.on(nameExpression, constraint, declaration));
trace.record(BindingContext.REFERENCE_TARGET, nameExpression, classifier);
}
else {
trace.report(UNRESOLVED_REFERENCE.on(nameExpression, nameExpression));
}
KtTypeReference boundTypeReference = constraint.getBoundTypeReference();
if (boundTypeReference != null) {
typeResolver.resolveType(scope, boundTypeReference, trace, true);
}
}
}
public static void checkUpperBoundType(
KtTypeReference upperBound,
@NotNull KotlinType upperBoundType,
BindingTrace trace
) {
if (DeclarationsCheckerKt.checkNotEnumEntry(upperBound, trace)) return;
if (!TypeUtils.canHaveSubtypes(KotlinTypeChecker.DEFAULT, upperBoundType)) {
trace.report(FINAL_UPPER_BOUND.on(upperBound, upperBoundType));
}
if (DynamicTypesKt.isDynamic(upperBoundType)) {
trace.report(DYNAMIC_UPPER_BOUND.on(upperBound));
}
if (KotlinBuiltIns.isExactExtensionFunctionType(upperBoundType)) {
trace.report(UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE.on(upperBound));
}
}
@NotNull
public VariableDescriptor resolveLocalVariableDescriptor(
@NotNull LexicalScope scope,
@NotNull KtParameter parameter,
BindingTrace trace
) {
KotlinType type = resolveParameterType(scope, parameter, trace);
return resolveLocalVariableDescriptor(parameter, type, trace, scope);
}
private KotlinType resolveParameterType(LexicalScope scope, KtParameter parameter, BindingTrace trace) {
KtTypeReference typeReference = parameter.getTypeReference();
KotlinType type;
if (typeReference != null) {
type = typeResolver.resolveType(scope, typeReference, trace, true);
}
else {
// Error is reported by the parser
type = ErrorUtils.createErrorType("Annotation is absent");
}
if (parameter.hasModifier(VARARG_KEYWORD)) {
return getVarargParameterType(type);
}
return type;
}
public VariableDescriptor resolveLocalVariableDescriptor(
@NotNull KtParameter parameter,
@NotNull KotlinType type,
BindingTrace trace,
@NotNull LexicalScope scope
) {
VariableDescriptor variableDescriptor = new LocalVariableDescriptor(
scope.getOwnerDescriptor(),
annotationResolver.resolveAnnotationsWithArguments(scope, parameter.getModifierList(), trace),
KtPsiUtil.safeName(parameter.getName()),
type,
false,
KotlinSourceElementKt.toSourceElement(parameter)
);
trace.record(BindingContext.VALUE_PARAMETER, parameter, variableDescriptor);
// Type annotations also should be resolved
ForceResolveUtil.forceResolveAllContents(type.getAnnotations());
return variableDescriptor;
}
@NotNull
public PropertyDescriptor resolvePropertyDescriptor(
@NotNull DeclarationDescriptor containingDeclaration,
@NotNull LexicalScope scope,
@NotNull KtProperty property,
@NotNull final BindingTrace trace,
@NotNull DataFlowInfo dataFlowInfo
) {
KtModifierList modifierList = property.getModifierList();
boolean isVar = property.isVar();
boolean hasBody = hasBody(property);
Visibility visibility = resolveVisibilityFromModifiers(property, getDefaultVisibility(property, containingDeclaration));
Modality modality = containingDeclaration instanceof ClassDescriptor
? resolveModalityFromModifiers(property, getDefaultModality(containingDeclaration, visibility, hasBody))
: Modality.FINAL;
final AnnotationSplitter.PropertyWrapper wrapper = new AnnotationSplitter.PropertyWrapper(property);
Annotations allAnnotations = annotationResolver.resolveAnnotationsWithoutArguments(scope, modifierList, trace);
AnnotationSplitter annotationSplitter =
new AnnotationSplitter(storageManager, allAnnotations, new Function0>() {
@Override
public Set invoke() {
return AnnotationSplitter.getTargetSet(false, trace.getBindingContext(), wrapper);
}
});
Annotations propertyAnnotations = new CompositeAnnotations(CollectionsKt.listOf(
annotationSplitter.getAnnotationsForTargets(PROPERTY, FIELD, PROPERTY_DELEGATE_FIELD),
annotationSplitter.getOtherAnnotations()));
PropertyDescriptorImpl propertyDescriptor = PropertyDescriptorImpl.create(
containingDeclaration,
propertyAnnotations,
modality,
visibility,
isVar,
KtPsiUtil.safeName(property.getName()),
CallableMemberDescriptor.Kind.DECLARATION,
KotlinSourceElementKt.toSourceElement(property),
modifierList != null && modifierList.hasModifier(KtTokens.LATEINIT_KEYWORD),
modifierList != null && modifierList.hasModifier(KtTokens.CONST_KEYWORD)
);
wrapper.setDescriptor(propertyDescriptor);
List typeParameterDescriptors;
LexicalScope scopeWithTypeParameters;
KotlinType receiverType = null;
{
List typeParameters = property.getTypeParameters();
if (typeParameters.isEmpty()) {
scopeWithTypeParameters = scope;
typeParameterDescriptors = Collections.emptyList();
}
else {
LexicalWritableScope writableScope = new LexicalWritableScope(
scope, containingDeclaration, false, null, new TraceBasedRedeclarationHandler(trace),
LexicalScopeKind.PROPERTY_HEADER);
typeParameterDescriptors = resolveTypeParametersForCallableDescriptor(
propertyDescriptor, writableScope, scope, typeParameters, trace);
writableScope.changeLockLevel(LexicalWritableScope.LockLevel.READING);
resolveGenericBounds(property, propertyDescriptor, writableScope, typeParameterDescriptors, trace);
scopeWithTypeParameters = writableScope;
}
KtTypeReference receiverTypeRef = property.getReceiverTypeReference();
if (receiverTypeRef != null) {
receiverType = typeResolver.resolveType(scopeWithTypeParameters, receiverTypeRef, trace, true);
}
}
ReceiverParameterDescriptor receiverDescriptor =
DescriptorFactory.createExtensionReceiverParameterForCallable(propertyDescriptor, receiverType);
KotlinType type = variableTypeResolver.process(
propertyDescriptor, ScopeUtils.makeScopeForPropertyInitializer(scopeWithTypeParameters, propertyDescriptor),
property, dataFlowInfo, true, trace
);
propertyDescriptor.setType(type, typeParameterDescriptors, getDispatchReceiverParameterIfNeeded(containingDeclaration),
receiverDescriptor);
PropertyGetterDescriptorImpl getter = resolvePropertyGetterDescriptor(
scopeWithTypeParameters, property, propertyDescriptor, annotationSplitter, trace);
PropertySetterDescriptor setter = resolvePropertySetterDescriptor(
scopeWithTypeParameters, property, propertyDescriptor, annotationSplitter, trace);
propertyDescriptor.initialize(getter, setter);
trace.record(BindingContext.VARIABLE, property, propertyDescriptor);
return propertyDescriptor;
}
/*package*/
static boolean hasBody(KtProperty property) {
boolean hasBody = property.hasDelegateExpressionOrInitializer();
if (!hasBody) {
KtPropertyAccessor getter = property.getGetter();
if (getter != null && getter.hasBody()) {
hasBody = true;
}
KtPropertyAccessor setter = property.getSetter();
if (!hasBody && setter != null && setter.hasBody()) {
hasBody = true;
}
}
return hasBody;
}
@Nullable
/*package*/ static KotlinType transformAnonymousTypeIfNeeded(
@NotNull DeclarationDescriptorWithVisibility descriptor,
@NotNull KtNamedDeclaration declaration,
@NotNull KotlinType type,
@NotNull BindingTrace trace
) {
ClassifierDescriptor classifier = type.getConstructor().getDeclarationDescriptor();
if (classifier == null || !DescriptorUtils.isAnonymousObject(classifier) || DescriptorUtils.isLocal(descriptor)) {
return type;
}
boolean definedInClass = DescriptorUtils.getParentOfType(descriptor, ClassDescriptor.class) != null;
if (!definedInClass || !Visibilities.isPrivate(descriptor.getVisibility())) {
if (type.getConstructor().getSupertypes().size() == 1) {
return type.getConstructor().getSupertypes().iterator().next();
}
else {
trace.report(AMBIGUOUS_ANONYMOUS_TYPE_INFERRED.on(declaration, type.getConstructor().getSupertypes()));
}
}
return type;
}
@Nullable
private PropertySetterDescriptor resolvePropertySetterDescriptor(
@NotNull LexicalScope scopeWithTypeParameters,
@NotNull KtProperty property,
@NotNull PropertyDescriptor propertyDescriptor,
@NotNull AnnotationSplitter annotationSplitter,
BindingTrace trace
) {
KtPropertyAccessor setter = property.getSetter();
PropertySetterDescriptorImpl setterDescriptor = null;
if (setter != null) {
Annotations annotations = new CompositeAnnotations(CollectionsKt.listOf(
annotationSplitter.getAnnotationsForTarget(PROPERTY_SETTER),
annotationResolver.resolveAnnotationsWithoutArguments(scopeWithTypeParameters, setter.getModifierList(), trace)));
KtParameter parameter = setter.getParameter();
setterDescriptor = new PropertySetterDescriptorImpl(propertyDescriptor, annotations,
resolveModalityFromModifiers(setter, propertyDescriptor.getModality()),
resolveVisibilityFromModifiers(setter, propertyDescriptor.getVisibility()),
setter.hasBody(), false, setter.hasModifier(EXTERNAL_KEYWORD),
CallableMemberDescriptor.Kind.DECLARATION, null, KotlinSourceElementKt
.toSourceElement(setter));
KtTypeReference returnTypeReference = setter.getReturnTypeReference();
if (returnTypeReference != null) {
KotlinType returnType = typeResolver.resolveType(scopeWithTypeParameters, returnTypeReference, trace, true);
if (!KotlinBuiltIns.isUnit(returnType)) {
trace.report(WRONG_SETTER_RETURN_TYPE.on(returnTypeReference));
}
}
if (parameter != null) {
// This check is redundant: the parser does not allow a default value, but we'll keep it just in case
if (parameter.hasDefaultValue()) {
trace.report(SETTER_PARAMETER_WITH_DEFAULT_VALUE.on(parameter.getDefaultValue()));
}
KotlinType type;
KtTypeReference typeReference = parameter.getTypeReference();
if (typeReference == null) {
type = propertyDescriptor.getType(); // TODO : this maybe unknown at this point
}
else {
type = typeResolver.resolveType(scopeWithTypeParameters, typeReference, trace, true);
KotlinType inType = propertyDescriptor.getType();
if (inType != null) {
if (!TypeUtils.equalTypes(type, inType)) {
trace.report(WRONG_SETTER_PARAMETER_TYPE.on(typeReference, inType, type));
}
}
else {
// TODO : the same check may be needed later???
}
}
ValueParameterDescriptorImpl valueParameterDescriptor =
resolveValueParameterDescriptor(scopeWithTypeParameters, setterDescriptor, parameter, 0, type, trace);
setterDescriptor.initialize(valueParameterDescriptor);
}
else {
setterDescriptor.initializeDefault();
}
trace.record(BindingContext.PROPERTY_ACCESSOR, setter, setterDescriptor);
}
else if (property.isVar()) {
Annotations setterAnnotations = annotationSplitter.getAnnotationsForTarget(PROPERTY_SETTER);
setterDescriptor = DescriptorFactory.createSetter(propertyDescriptor, setterAnnotations, !property.hasDelegate(),
/* isExternal = */ false, propertyDescriptor.getSource());
}
if (!property.isVar()) {
if (setter != null) {
// trace.getErrorHandler().genericError(setter.asElement().getNode(), "A 'val'-property cannot have a setter");
trace.report(VAL_WITH_SETTER.on(setter));
}
}
return setterDescriptor;
}
@NotNull
private PropertyGetterDescriptorImpl resolvePropertyGetterDescriptor(
@NotNull LexicalScope scopeWithTypeParameters,
@NotNull KtProperty property,
@NotNull PropertyDescriptor propertyDescriptor,
@NotNull AnnotationSplitter annotationSplitter,
BindingTrace trace
) {
PropertyGetterDescriptorImpl getterDescriptor;
KtPropertyAccessor getter = property.getGetter();
if (getter != null) {
Annotations getterAnnotations = new CompositeAnnotations(CollectionsKt.listOf(
annotationSplitter.getAnnotationsForTarget(PROPERTY_GETTER),
annotationResolver.resolveAnnotationsWithoutArguments(scopeWithTypeParameters, getter.getModifierList(), trace)));
KotlinType outType = propertyDescriptor.getType();
KotlinType returnType = outType;
KtTypeReference returnTypeReference = getter.getReturnTypeReference();
if (returnTypeReference != null) {
returnType = typeResolver.resolveType(scopeWithTypeParameters, returnTypeReference, trace, true);
if (outType != null && !TypeUtils.equalTypes(returnType, outType)) {
trace.report(WRONG_GETTER_RETURN_TYPE.on(returnTypeReference, propertyDescriptor.getReturnType(), outType));
}
}
getterDescriptor = new PropertyGetterDescriptorImpl(propertyDescriptor, getterAnnotations,
resolveModalityFromModifiers(getter, propertyDescriptor.getModality()),
resolveVisibilityFromModifiers(getter, propertyDescriptor.getVisibility()),
getter.hasBody(), false, getter.hasModifier(EXTERNAL_KEYWORD),
CallableMemberDescriptor.Kind.DECLARATION, null, KotlinSourceElementKt
.toSourceElement(getter));
getterDescriptor.initialize(returnType);
trace.record(BindingContext.PROPERTY_ACCESSOR, getter, getterDescriptor);
}
else {
Annotations getterAnnotations = annotationSplitter.getAnnotationsForTarget(PROPERTY_GETTER);
getterDescriptor = DescriptorFactory.createGetter(propertyDescriptor, getterAnnotations, !property.hasDelegate(),
/* isExternal = */ false);
getterDescriptor.initialize(propertyDescriptor.getType());
}
return getterDescriptor;
}
@NotNull
public PropertyDescriptor resolvePrimaryConstructorParameterToAProperty(
@NotNull ClassDescriptor classDescriptor,
@NotNull ValueParameterDescriptor valueParameter,
@NotNull LexicalScope scope,
@NotNull KtParameter parameter, final BindingTrace trace
) {
KotlinType type = resolveParameterType(scope, parameter, trace);
Name name = parameter.getNameAsSafeName();
boolean isMutable = parameter.isMutable();
KtModifierList modifierList = parameter.getModifierList();
if (modifierList != null) {
if (modifierList.hasModifier(KtTokens.ABSTRACT_KEYWORD)) {
trace.report(ABSTRACT_PROPERTY_IN_PRIMARY_CONSTRUCTOR_PARAMETERS.on(parameter));
}
}
final AnnotationSplitter.PropertyWrapper propertyWrapper = new AnnotationSplitter.PropertyWrapper(parameter);
Annotations allAnnotations = annotationResolver.resolveAnnotationsWithoutArguments(scope, parameter.getModifierList(), trace);
AnnotationSplitter annotationSplitter =
new AnnotationSplitter(storageManager, allAnnotations, new Function0>() {
@Override
public Set invoke() {
return AnnotationSplitter.getTargetSet(true, trace.getBindingContext(), propertyWrapper);
}
});
Annotations propertyAnnotations = new CompositeAnnotations(
annotationSplitter.getAnnotationsForTargets(PROPERTY, FIELD),
annotationSplitter.getOtherAnnotations());
PropertyDescriptorImpl propertyDescriptor = PropertyDescriptorImpl.create(
classDescriptor,
propertyAnnotations,
resolveModalityFromModifiers(parameter, Modality.FINAL),
resolveVisibilityFromModifiers(parameter, getDefaultVisibility(parameter, classDescriptor)),
isMutable,
name,
CallableMemberDescriptor.Kind.DECLARATION,
KotlinSourceElementKt.toSourceElement(parameter),
/* lateInit = */ false,
/* isConst = */ false
);
propertyWrapper.setDescriptor(propertyDescriptor);
propertyDescriptor.setType(type, Collections.emptyList(),
getDispatchReceiverParameterIfNeeded(classDescriptor), (ReceiverParameterDescriptor) null);
Annotations setterAnnotations = annotationSplitter.getAnnotationsForTarget(PROPERTY_SETTER);
Annotations getterAnnotations = new CompositeAnnotations(CollectionsKt.listOf(
annotationSplitter.getAnnotationsForTarget(PROPERTY_GETTER)));
PropertyGetterDescriptorImpl getter = DescriptorFactory.createDefaultGetter(propertyDescriptor, getterAnnotations);
PropertySetterDescriptor setter =
propertyDescriptor.isVar() ? DescriptorFactory.createDefaultSetter(propertyDescriptor, setterAnnotations) : null;
propertyDescriptor.initialize(getter, setter);
getter.initialize(propertyDescriptor.getType());
trace.record(BindingContext.PRIMARY_CONSTRUCTOR_PARAMETER, parameter, propertyDescriptor);
trace.record(BindingContext.VALUE_PARAMETER_AS_PROPERTY, valueParameter, propertyDescriptor);
return propertyDescriptor;
}
public static void checkBounds(@NotNull KtTypeReference typeReference, @NotNull KotlinType type, @NotNull BindingTrace trace) {
if (type.isError()) return;
KtTypeElement typeElement = typeReference.getTypeElement();
if (typeElement == null) return;
List parameters = type.getConstructor().getParameters();
List arguments = type.getArguments();
assert parameters.size() == arguments.size();
List jetTypeArguments = typeElement.getTypeArgumentsAsTypes();
// A type reference from Kotlin code can yield a flexible type only if it's `ft`, whose bounds should not be checked
if (FlexibleTypesKt.isFlexible(type) && !DynamicTypesKt.isDynamic(type)) {
assert jetTypeArguments.size() == 2
: "Flexible type cannot be denoted in Kotlin otherwise than as ft, but was: "
+ PsiUtilsKt.getElementTextWithContext(typeReference);
// it's really ft
Flexibility flexibility = FlexibleTypesKt.flexibility(type);
checkBounds(jetTypeArguments.get(0), flexibility.getLowerBound(), trace);
checkBounds(jetTypeArguments.get(1), flexibility.getUpperBound(), trace);
return;
}
assert jetTypeArguments.size() <= arguments.size() : typeElement.getText() + ": " + jetTypeArguments + " - " + arguments;
TypeSubstitutor substitutor = TypeSubstitutor.create(type);
for (int i = 0; i < jetTypeArguments.size(); i++) {
KtTypeReference jetTypeArgument = jetTypeArguments.get(i);
if (jetTypeArgument == null) continue;
KotlinType typeArgument = arguments.get(i).getType();
checkBounds(jetTypeArgument, typeArgument, trace);
TypeParameterDescriptor typeParameterDescriptor = parameters.get(i);
checkBounds(jetTypeArgument, typeArgument, typeParameterDescriptor, substitutor, trace);
}
}
public static void checkBounds(
@NotNull KtTypeReference jetTypeArgument,
@NotNull KotlinType typeArgument,
@NotNull TypeParameterDescriptor typeParameterDescriptor,
@NotNull TypeSubstitutor substitutor,
@NotNull BindingTrace trace
) {
for (KotlinType bound : typeParameterDescriptor.getUpperBounds()) {
KotlinType substitutedBound = substitutor.safeSubstitute(bound, Variance.INVARIANT);
if (!KotlinTypeChecker.DEFAULT.isSubtypeOf(typeArgument, substitutedBound)) {
trace.report(UPPER_BOUND_VIOLATED.on(jetTypeArgument, substitutedBound, typeArgument));
}
}
}
public static boolean checkHasOuterClassInstance(
@NotNull LexicalScope scope,
@NotNull BindingTrace trace,
@NotNull PsiElement reportErrorsOn,
@NotNull ClassDescriptor target
) {
ClassDescriptor classDescriptor = getContainingClass(scope);
if (!isInsideOuterClassOrItsSubclass(classDescriptor, target)) {
return true;
}
while (classDescriptor != null) {
if (isSubclass(classDescriptor, target)) {
return true;
}
if (isStaticNestedClass(classDescriptor)) {
trace.report(INACCESSIBLE_OUTER_CLASS_EXPRESSION.on(reportErrorsOn, classDescriptor));
return false;
}
classDescriptor = getParentOfType(classDescriptor, ClassDescriptor.class, true);
}
return true;
}
private static boolean isInsideOuterClassOrItsSubclass(@Nullable DeclarationDescriptor nested, @NotNull ClassDescriptor outer) {
if (nested == null) return false;
if (nested instanceof ClassDescriptor && isSubclass((ClassDescriptor) nested, outer)) return true;
return isInsideOuterClassOrItsSubclass(nested.getContainingDeclaration(), outer);
}
@Nullable
public static ClassDescriptor getContainingClass(@NotNull LexicalScope scope) {
return getParentOfType(scope.getOwnerDescriptor(), ClassDescriptor.class, false);
}
public static void registerFileInPackage(@NotNull BindingTrace trace, @NotNull KtFile file) {
// Register files corresponding to this package
// The trace currently does not support bi-di multimaps that would handle this task nicer
FqName fqName = file.getPackageFqName();
Collection files = trace.get(PACKAGE_TO_FILES, fqName);
if (files == null) {
files = Sets.newIdentityHashSet();
}
files.add(file);
trace.record(BindingContext.PACKAGE_TO_FILES, fqName, files);
}
}
