public static void genClassOrObject(
@NotNull CodegenContext parentContext,
@NotNull JetClassOrObject aClass,
@NotNull GenerationState state,
@Nullable MemberCodegen<?> parentCodegen) {
ClassDescriptor descriptor = state.getBindingContext().get(BindingContext.CLASS, aClass);
if (descriptor == null || ErrorUtils.isError(descriptor)) {
badDescriptor(descriptor, state.getClassBuilderMode());
return;
}
if (descriptor.getName().equals(SpecialNames.NO_NAME_PROVIDED)) {
badDescriptor(descriptor, state.getClassBuilderMode());
}
ClassBuilder classBuilder =
state.getFactory().forClassImplementation(descriptor, aClass.getContainingFile());
ClassContext classContext =
parentContext.intoClass(descriptor, OwnerKind.IMPLEMENTATION, state);
new ImplementationBodyCodegen(aClass, classContext, classBuilder, state, parentCodegen)
.generate();
if (aClass instanceof JetClass && ((JetClass) aClass).isTrait()) {
ClassBuilder traitImplBuilder =
state.getFactory().forTraitImplementation(descriptor, state, aClass.getContainingFile());
ClassContext traitImplContext =
parentContext.intoClass(descriptor, OwnerKind.TRAIT_IMPL, state);
new TraitImplBodyCodegen(aClass, traitImplContext, traitImplBuilder, state, parentCodegen)
.generate();
}
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
JetType type = QuickFixUtil.getDeclarationReturnType(element);
return super.isAvailable(project, editor, file)
&& type != null
&& !ErrorUtils.isErrorType(type);
}
@NotNull
private JetType modifyTypeAccordingToSuperMethods(
@NotNull JetType autoType,
@NotNull List<TypeAndVariance> typesFromSuper,
@NotNull TypeUsage howThisTypeIsUsed) {
if (ErrorUtils.isErrorType(autoType)) {
return autoType;
}
boolean resultNullable = typeMustBeNullable(autoType, typesFromSuper, howThisTypeIsUsed);
ClassifierDescriptor resultClassifier = modifyTypeClassifier(autoType, typesFromSuper);
List<TypeProjection> resultArguments =
getTypeArgsOfType(autoType, resultClassifier, typesFromSuper);
JetScope resultScope;
if (resultClassifier instanceof ClassDescriptor) {
resultScope = ((ClassDescriptor) resultClassifier).getMemberScope(resultArguments);
} else {
resultScope = autoType.getMemberScope();
}
JetTypeImpl type =
new JetTypeImpl(
autoType.getAnnotations(),
resultClassifier.getTypeConstructor(),
resultNullable,
resultArguments,
resultScope);
PropagationHeuristics.checkArrayInReturnType(this, type, typesFromSuper);
return type;
}
@NotNull
public TypeInfoForCall getQualifiedExpressionExtendedTypeInfo(
@NotNull JetQualifiedExpression expression,
@NotNull ResolutionContext context,
@NotNull ResolveMode resolveMode) {
// TODO : functions as values
JetExpression selectorExpression = expression.getSelectorExpression();
JetExpression receiverExpression = expression.getReceiverExpression();
JetTypeInfo receiverTypeInfo =
expressionTypingServices.getTypeInfoWithNamespaces(
receiverExpression,
context.scope,
NO_EXPECTED_TYPE,
context.dataFlowInfo,
context.trace);
JetType receiverType = receiverTypeInfo.getType();
if (selectorExpression == null) return TypeInfoForCall.create(null, context.dataFlowInfo);
if (receiverType == null)
receiverType = ErrorUtils.createErrorType("Type for " + expression.getText());
context = context.replaceDataFlowInfo(receiverTypeInfo.getDataFlowInfo());
if (selectorExpression instanceof JetSimpleNameExpression) {
ConstantUtils.propagateConstantValues(
expression, context.trace, (JetSimpleNameExpression) selectorExpression);
}
TypeInfoForCall selectorReturnTypeInfo =
getSelectorReturnTypeInfo(
new ExpressionReceiver(receiverExpression, receiverType),
expression.getOperationTokenNode(),
selectorExpression,
context,
resolveMode);
JetType selectorReturnType = selectorReturnTypeInfo.getType();
// TODO move further
if (!(receiverType instanceof NamespaceType)
&& expression.getOperationSign() == JetTokens.SAFE_ACCESS) {
if (selectorReturnType != null
&& !selectorReturnType.isNullable()
&& !KotlinBuiltIns.getInstance().isUnit(selectorReturnType)) {
if (receiverType.isNullable()) {
selectorReturnType = TypeUtils.makeNullable(selectorReturnType);
}
}
}
// TODO : this is suspicious: remove this code?
if (selectorReturnType != null) {
context.trace.record(BindingContext.EXPRESSION_TYPE, selectorExpression, selectorReturnType);
}
JetTypeInfo typeInfo =
JetTypeInfo.create(selectorReturnType, selectorReturnTypeInfo.getDataFlowInfo());
if (resolveMode == ResolveMode.TOP_LEVEL_CALL) {
DataFlowUtils.checkType(typeInfo.getType(), expression, context, typeInfo.getDataFlowInfo());
}
return TypeInfoForCall.create(typeInfo, selectorReturnTypeInfo);
}
public ErrorSimpleFunctionDescriptorImpl(ErrorUtils.ErrorScope ownerScope) {
super(
ErrorUtils.getErrorClass(),
Annotations.EMPTY,
Name.special("<ERROR FUNCTION>"),
Kind.DECLARATION);
this.ownerScope = ownerScope;
}
private void reportIncompleteHierarchyForErrorTypes(
ClassDescriptor classDescriptor, List<JetType> result) {
for (JetType supertype : result) {
if (ErrorUtils.isErrorType(supertype)) {
trace.record(BindingContext.INCOMPLETE_HIERARCHY, classDescriptor);
}
}
}
private List<ValueParameterDescriptor> createValueParameterDescriptors(
ExpressionTypingContext context,
JetFunctionLiteral functionLiteral,
FunctionDescriptorImpl functionDescriptor,
boolean functionTypeExpected) {
List<ValueParameterDescriptor> valueParameterDescriptors = Lists.newArrayList();
List<JetParameter> declaredValueParameters = functionLiteral.getValueParameters();
List<ValueParameterDescriptor> expectedValueParameters =
(functionTypeExpected)
? JetStandardClasses.getValueParameters(functionDescriptor, context.expectedType)
: null;
boolean hasDeclaredValueParameters = functionLiteral.getValueParameterList() != null;
if (functionTypeExpected
&& !hasDeclaredValueParameters
&& expectedValueParameters.size() == 1) {
ValueParameterDescriptor valueParameterDescriptor = expectedValueParameters.get(0);
ValueParameterDescriptor it =
new ValueParameterDescriptorImpl(
functionDescriptor,
0,
Collections.<AnnotationDescriptor>emptyList(),
"it",
false,
valueParameterDescriptor.getOutType(),
valueParameterDescriptor.hasDefaultValue(),
valueParameterDescriptor.getVarargElementType());
valueParameterDescriptors.add(it);
context.trace.record(AUTO_CREATED_IT, it);
} else {
for (int i = 0; i < declaredValueParameters.size(); i++) {
JetParameter declaredParameter = declaredValueParameters.get(i);
JetTypeReference typeReference = declaredParameter.getTypeReference();
JetType type;
if (typeReference != null) {
type = context.getTypeResolver().resolveType(context.scope, typeReference);
} else {
if (expectedValueParameters != null && i < expectedValueParameters.size()) {
type = expectedValueParameters.get(i).getOutType();
} else {
context.trace.report(CANNOT_INFER_PARAMETER_TYPE.on(declaredParameter));
type = ErrorUtils.createErrorType("Cannot be inferred");
}
}
ValueParameterDescriptor valueParameterDescriptor =
context
.getDescriptorResolver()
.resolveValueParameterDescriptor(functionDescriptor, declaredParameter, i, type);
valueParameterDescriptors.add(valueParameterDescriptor);
}
}
return valueParameterDescriptors;
}
private String renderType(JetType type, boolean shortNamesOnly) {
if (type == null) {
return escape("[NULL]");
} else if (ErrorUtils.isErrorType(type)) {
return escape(type.toString());
} else if (JetStandardClasses.isUnit(type)) {
return escape(JetStandardClasses.UNIT_ALIAS + (type.isNullable() ? "?" : ""));
} else if (JetStandardClasses.isTupleType(type)) {
return escape(renderTupleType(type, shortNamesOnly));
} else if (JetStandardClasses.isFunctionType(type)) {
return escape(renderFunctionType(type, shortNamesOnly));
} else {
return escape(renderDefaultType(type, shortNamesOnly));
}
}
private boolean furtherNameLookup(
@NotNull JetSimpleNameExpression expression,
@NotNull JetType[] result,
@NotNull ResolutionContext context) {
NamespaceType namespaceType = lookupNamespaceType(expression, context);
if (namespaceType == null) {
return false;
}
if (context.expressionPosition == ExpressionPosition.LHS_OF_DOT) {
result[0] = namespaceType;
return true;
}
context.trace.report(EXPRESSION_EXPECTED_NAMESPACE_FOUND.on(expression));
result[0] = ErrorUtils.createErrorType("Type for " + expression.getReferencedNameAsName());
return false;
}
/**
* Add import directive corresponding to a type to file when it is needed.
*
* @param type type to import
* @param file file where import directive should be added
*/
public static void addImportDirectivesIfNeeded(@NotNull JetType type, @NotNull JetFile file) {
if (JetPluginUtil.checkTypeIsStandard(type, file.getProject())
|| ErrorUtils.isErrorType(type)) {
return;
}
BindingContext bindingContext = getContextForSingleFile(file);
PsiElement element =
BindingContextUtils.descriptorToDeclaration(
bindingContext, type.getMemberScope().getContainingDeclaration());
if (element != null
&& element.getContainingFile()
== file) { // declaration is in the same file, so no import is needed
return;
}
for (ClassDescriptor clazz : TypeUtils.getAllClassDescriptors(type)) {
addImportDirective(DescriptorUtils.getFQName(getTopLevelClass(clazz)).toSafe(), file);
}
}
@Override
public void visitClassType(String name, boolean nullable, boolean forceReal) {
FqName ourName =
new FqName(
name.replace('/', '.').replace('$', '.') // TODO: not sure
);
this.classDescriptor = null;
if (!forceReal) {
classDescriptor =
javaSemanticServices
.getTypeTransformer()
.getKotlinAnalog(ourName, JavaTypeTransformer.TypeUsage.MEMBER_SIGNATURE_INVARIANT);
}
if (classDescriptor == null) {
// TODO: this is the worst code in Kotlin project
Matcher matcher = Pattern.compile("jet\\.Function(\\d+)").matcher(ourName.getFqName());
if (matcher.matches()) {
classDescriptor = JetStandardClasses.getFunction(Integer.parseInt(matcher.group(1)));
}
}
if (classDescriptor == null) {
Matcher matcher = Pattern.compile("jet\\.Tuple(\\d+)").matcher(ourName.getFqName());
if (matcher.matches()) {
classDescriptor = JetStandardClasses.getTuple(Integer.parseInt(matcher.group(1)));
}
}
if (this.classDescriptor == null) {
this.classDescriptor =
javaDescriptorResolver.resolveClass(ourName, DescriptorSearchRule.INCLUDE_KOTLIN);
}
if (this.classDescriptor == null) {
// TODO: report in to trace
this.errorType = ErrorUtils.createErrorType("class not found by name: " + ourName);
}
this.nullable = nullable;
this.typeArguments = new ArrayList<TypeProjection>();
}
@NotNull
private String renderClassName(@NotNull ClassDescriptor klass) {
if (ErrorUtils.isError(klass)) {
return klass.getTypeConstructor().toString();
}
if (shortNames) {
List<Name> qualifiedNameElements = Lists.newArrayList();
// for nested classes qualified name should be used
DeclarationDescriptor current = klass;
do {
if (((ClassDescriptor) current).getKind() != ClassKind.CLASS_OBJECT) {
qualifiedNameElements.add(current.getName());
}
current = current.getContainingDeclaration();
} while (current instanceof ClassDescriptor);
Collections.reverse(qualifiedNameElements);
return renderFqName(qualifiedNameElements);
}
return renderFqName(DescriptorUtils.getFQName(klass));
}
private void transformSupertypeList(
List<JetType> result,
PsiClassType[] extendsListTypes,
TypeVariableResolver typeVariableResolver) {
for (PsiClassType type : extendsListTypes) {
PsiClass resolved = type.resolve();
if (resolved != null) {
String qualifiedName = resolved.getQualifiedName();
assert qualifiedName != null;
if (JvmStdlibNames.JET_OBJECT.getFqName().equalsTo(qualifiedName)) {
continue;
}
}
JetType transform =
typeTransformer.transformToType(type, TypeUsage.SUPERTYPE, typeVariableResolver);
if (ErrorUtils.isErrorType(transform)) {
continue;
}
result.add(TypeUtils.makeNotNullable(transform));
}
}
@Override
public boolean apply(JetType type) {
return !ErrorUtils.isErrorType(type) && (TypeUtils.getClassDescriptor(type) != null);
}
@NotNull
public TypeInfoForCall getCallExpressionTypeInfoForCallWithoutFinalTypeCheck(
@NotNull JetCallExpression callExpression,
@NotNull ReceiverValue receiver,
@Nullable ASTNode callOperationNode,
@NotNull ResolutionContext context,
@NotNull ResolveMode resolveMode) {
boolean[] result = new boolean[1];
Call call = CallMaker.makeCall(receiver, callOperationNode, callExpression);
TemporaryBindingTrace traceForFunction =
TemporaryBindingTrace.create(
context.trace, "trace to resolve as function call", callExpression);
ResolvedCall<FunctionDescriptor> resolvedCall =
getResolvedCallForFunction(
call,
callExpression,
receiver,
context.replaceBindingTrace(traceForFunction),
resolveMode,
result);
if (result[0]) {
FunctionDescriptor functionDescriptor =
resolvedCall != null ? resolvedCall.getResultingDescriptor() : null;
traceForFunction.commit();
if (callExpression.getValueArgumentList() == null
&& callExpression.getFunctionLiteralArguments().isEmpty()) {
// there are only type arguments
boolean hasValueParameters =
functionDescriptor == null || functionDescriptor.getValueParameters().size() > 0;
context.trace.report(
FUNCTION_CALL_EXPECTED.on(callExpression, callExpression, hasValueParameters));
}
if (functionDescriptor == null) {
return TypeInfoForCall.create(null, context.dataFlowInfo);
}
JetType type = functionDescriptor.getReturnType();
return TypeInfoForCall.create(
type, resolvedCall.getDataFlowInfo(), resolvedCall, call, context, resolveMode);
}
JetExpression calleeExpression = callExpression.getCalleeExpression();
if (calleeExpression instanceof JetSimpleNameExpression
&& callExpression.getTypeArgumentList() == null) {
TemporaryBindingTrace traceForVariable =
TemporaryBindingTrace.create(
context.trace, "trace to resolve as variable with 'invoke' call", callExpression);
JetType type =
getVariableType(
(JetSimpleNameExpression) calleeExpression,
receiver,
callOperationNode,
context.replaceBindingTrace(traceForVariable),
result);
if (result[0]) {
traceForVariable.commit();
context.trace.report(
FUNCTION_EXPECTED.on(
(JetReferenceExpression) calleeExpression,
calleeExpression,
type != null ? type : ErrorUtils.createErrorType("")));
return TypeInfoForCall.create(null, context.dataFlowInfo);
}
}
traceForFunction.commit();
return TypeInfoForCall.create(null, context.dataFlowInfo);
}
@Override
public JetType visitFunctionLiteralExpression(
JetFunctionLiteralExpression expression, ExpressionTypingContext context) {
JetFunctionLiteral functionLiteral = expression.getFunctionLiteral();
JetBlockExpression bodyExpression = functionLiteral.getBodyExpression();
if (bodyExpression == null) return null;
JetType expectedType = context.expectedType;
boolean functionTypeExpected =
expectedType != TypeUtils.NO_EXPECTED_TYPE
&& JetStandardClasses.isFunctionType(expectedType);
NamedFunctionDescriptorImpl functionDescriptor =
createFunctionDescriptor(expression, context, functionTypeExpected);
List<JetType> parameterTypes = Lists.newArrayList();
List<ValueParameterDescriptor> valueParameters = functionDescriptor.getValueParameters();
for (ValueParameterDescriptor valueParameter : valueParameters) {
parameterTypes.add(valueParameter.getOutType());
}
ReceiverDescriptor receiverParameter = functionDescriptor.getReceiverParameter();
JetType receiver = receiverParameter != NO_RECEIVER ? receiverParameter.getType() : null;
JetType returnType = TypeUtils.NO_EXPECTED_TYPE;
JetScope functionInnerScope =
FunctionDescriptorUtil.getFunctionInnerScope(
context.scope, functionDescriptor, context.trace);
JetTypeReference returnTypeRef = functionLiteral.getReturnTypeRef();
if (returnTypeRef != null) {
returnType = context.getTypeResolver().resolveType(context.scope, returnTypeRef);
context
.getServices()
.checkFunctionReturnType(
expression,
context
.replaceScope(functionInnerScope)
.replaceExpectedType(returnType)
.replaceExpectedReturnType(returnType)
.replaceDataFlowInfo(context.dataFlowInfo));
} else {
if (functionTypeExpected) {
returnType = JetStandardClasses.getReturnTypeFromFunctionType(expectedType);
}
returnType =
context
.getServices()
.getBlockReturnedType(
functionInnerScope,
bodyExpression,
CoercionStrategy.COERCION_TO_UNIT,
context.replaceExpectedType(returnType).replaceExpectedReturnType(returnType));
}
JetType safeReturnType =
returnType == null ? ErrorUtils.createErrorType("<return type>") : returnType;
functionDescriptor.setReturnType(safeReturnType);
boolean hasDeclaredValueParameters = functionLiteral.getValueParameterList() != null;
if (!hasDeclaredValueParameters && functionTypeExpected) {
JetType expectedReturnType = JetStandardClasses.getReturnTypeFromFunctionType(expectedType);
if (JetStandardClasses.isUnit(expectedReturnType)) {
functionDescriptor.setReturnType(JetStandardClasses.getUnitType());
return DataFlowUtils.checkType(
JetStandardClasses.getFunctionType(
Collections.<AnnotationDescriptor>emptyList(),
receiver,
parameterTypes,
JetStandardClasses.getUnitType()),
expression,
context);
}
}
return DataFlowUtils.checkType(
JetStandardClasses.getFunctionType(
Collections.<AnnotationDescriptor>emptyList(),
receiver,
parameterTypes,
safeReturnType),
expression,
context);
}
@Override
public JetType invoke(Boolean firstTime) {
if (firstTime) throw new ReenteringLazyValueComputationException();
return ErrorUtils.createErrorType("Recursive dependency");
}
private static void addNamesForType(
ArrayList<String> result, JetType jetType, JetNameValidator validator) {
JetStandardLibrary standardLibrary = JetStandardLibrary.getInstance();
JetTypeChecker typeChecker = JetTypeChecker.INSTANCE;
if (ErrorUtils.containsErrorType(jetType)) return;
if (typeChecker.equalTypes(standardLibrary.getBooleanType(), jetType)) {
addName(result, "b", validator);
} else if (typeChecker.equalTypes(standardLibrary.getIntType(), jetType)) {
addName(result, "i", validator);
} else if (typeChecker.equalTypes(standardLibrary.getByteType(), jetType)) {
addName(result, "byte", validator);
} else if (typeChecker.equalTypes(standardLibrary.getLongType(), jetType)) {
addName(result, "l", validator);
} else if (typeChecker.equalTypes(standardLibrary.getFloatType(), jetType)) {
addName(result, "fl", validator);
} else if (typeChecker.equalTypes(standardLibrary.getDoubleType(), jetType)) {
addName(result, "d", validator);
} else if (typeChecker.equalTypes(standardLibrary.getShortType(), jetType)) {
addName(result, "sh", validator);
} else if (typeChecker.equalTypes(standardLibrary.getCharType(), jetType)) {
addName(result, "c", validator);
} else if (typeChecker.equalTypes(standardLibrary.getStringType(), jetType)) {
addName(result, "s", validator);
} else {
if (jetType.getArguments().size() == 1) {
JetType argument = jetType.getArguments().get(0).getType();
if (typeChecker.equalTypes(standardLibrary.getArrayType(argument), jetType)) {
if (typeChecker.equalTypes(standardLibrary.getBooleanType(), argument)) {
addName(result, "booleans", validator);
} else if (typeChecker.equalTypes(standardLibrary.getIntType(), argument)) {
addName(result, "ints", validator);
} else if (typeChecker.equalTypes(standardLibrary.getByteType(), argument)) {
addName(result, "bytes", validator);
} else if (typeChecker.equalTypes(standardLibrary.getLongType(), argument)) {
addName(result, "longs", validator);
} else if (typeChecker.equalTypes(standardLibrary.getFloatType(), argument)) {
addName(result, "floats", validator);
} else if (typeChecker.equalTypes(standardLibrary.getDoubleType(), argument)) {
addName(result, "doubles", validator);
} else if (typeChecker.equalTypes(standardLibrary.getShortType(), argument)) {
addName(result, "shorts", validator);
} else if (typeChecker.equalTypes(standardLibrary.getCharType(), argument)) {
addName(result, "chars", validator);
} else if (typeChecker.equalTypes(standardLibrary.getStringType(), argument)) {
addName(result, "strings", validator);
} else {
ClassDescriptor classDescriptor = TypeUtils.getClassDescriptor(argument);
if (classDescriptor != null) {
Name className = classDescriptor.getName();
addName(
result, "arrayOf" + StringUtil.capitalize(className.getName()) + "s", validator);
}
}
} else {
addForClassType(result, jetType, validator);
}
} else {
addForClassType(result, jetType, validator);
}
}
}
private void addConstraint(
@NotNull ConstraintKind constraintKind,
@NotNull JetType subjectType,
@Nullable JetType constrainingType,
@NotNull ConstraintPosition constraintPosition) {
if (constrainingType == TypeUtils.NO_EXPECTED_TYPE
|| constrainingType == DONT_CARE
|| constrainingType == CANT_INFER) {
return;
}
if (constrainingType == null
|| (ErrorUtils.isErrorType(constrainingType)
&& constrainingType != PLACEHOLDER_FUNCTION_TYPE)) {
hasErrorInConstrainingTypes = true;
return;
}
assert subjectType != TypeUtils.NO_EXPECTED_TYPE
: "Subject type shouldn't be NO_EXPECTED_TYPE (in position " + constraintPosition + " )";
if (ErrorUtils.isErrorType(subjectType)) return;
DeclarationDescriptor subjectTypeDescriptor =
subjectType.getConstructor().getDeclarationDescriptor();
KotlinBuiltIns kotlinBuiltIns = KotlinBuiltIns.getInstance();
if (constrainingType == PLACEHOLDER_FUNCTION_TYPE) {
if (!kotlinBuiltIns.isFunctionOrExtensionFunctionType(subjectType)) {
if (subjectTypeDescriptor instanceof TypeParameterDescriptor
&& typeParameterConstraints.get(subjectTypeDescriptor) != null) {
// a constraint binds type parameter and any function type, so there is no new info and no
// error
return;
}
errorConstraintPositions.add(constraintPosition);
}
return;
}
// todo temporary hack
// function literal without declaring receiver type { x -> ... }
// can be considered as extension function if one is expected
// (special type constructor for function/ extension function should be introduced like
// PLACEHOLDER_FUNCTION_TYPE)
if (constraintKind == SUB_TYPE
&& kotlinBuiltIns.isFunctionType(constrainingType)
&& kotlinBuiltIns.isExtensionFunctionType(subjectType)) {
constrainingType = createCorrespondingExtensionFunctionType(constrainingType, DONT_CARE);
}
DeclarationDescriptor constrainingTypeDescriptor =
constrainingType.getConstructor().getDeclarationDescriptor();
if (subjectTypeDescriptor instanceof TypeParameterDescriptor) {
TypeParameterDescriptor typeParameter = (TypeParameterDescriptor) subjectTypeDescriptor;
TypeConstraintsImpl typeConstraints = typeParameterConstraints.get(typeParameter);
if (typeConstraints != null) {
if (TypeUtils.dependsOnTypeParameterConstructors(
constrainingType, Collections.singleton(DONT_CARE.getConstructor()))) {
return;
}
if (subjectType.isNullable() && constrainingType.isNullable()) {
constrainingType = TypeUtils.makeNotNullable(constrainingType);
}
typeConstraints.addBound(constraintKind, constrainingType);
return;
}
}
if (constrainingTypeDescriptor instanceof TypeParameterDescriptor) {
assert typeParameterConstraints.get(constrainingTypeDescriptor) == null
: "Constraining type contains type variable " + constrainingTypeDescriptor.getName();
}
if (constraintKind == SUB_TYPE && kotlinBuiltIns.isNothingOrNullableNothing(constrainingType)) {
// following constraints are always true:
// 'Nothing' is a subtype of any type
if (!constrainingType.isNullable()) return;
// 'Nothing?' is a subtype of nullable type
if (subjectType.isNullable()) return;
}
if (!(constrainingTypeDescriptor instanceof ClassDescriptor)
|| !(subjectTypeDescriptor instanceof ClassDescriptor)) {
errorConstraintPositions.add(constraintPosition);
return;
}
switch (constraintKind) {
case SUB_TYPE:
{
if (kotlinBuiltIns.isNothingOrNullableNothing(constrainingType)) break;
JetType correspondingSupertype =
TypeCheckingProcedure.findCorrespondingSupertype(constrainingType, subjectType);
if (correspondingSupertype != null) {
constrainingType = correspondingSupertype;
}
break;
}
case SUPER_TYPE:
{
if (kotlinBuiltIns.isNothingOrNullableNothing(subjectType)) break;
JetType correspondingSupertype =
TypeCheckingProcedure.findCorrespondingSupertype(subjectType, constrainingType);
if (correspondingSupertype != null) {
subjectType = correspondingSupertype;
}
}
case EQUAL: // nothing
}
if (constrainingType.getConstructor() != subjectType.getConstructor()) {
errorConstraintPositions.add(constraintPosition);
return;
}
TypeConstructor typeConstructor = subjectType.getConstructor();
List<TypeProjection> subjectArguments = subjectType.getArguments();
List<TypeProjection> constrainingArguments = constrainingType.getArguments();
List<TypeParameterDescriptor> parameters = typeConstructor.getParameters();
for (int i = 0; i < subjectArguments.size(); i++) {
Variance typeParameterVariance = parameters.get(i).getVariance();
TypeProjection subjectArgument = subjectArguments.get(i);
TypeProjection constrainingArgument = constrainingArguments.get(i);
ConstraintKind typeParameterConstraintKind =
getTypeParameterConstraintKind(
typeParameterVariance, subjectArgument, constrainingArgument, constraintKind);
addConstraint(
typeParameterConstraintKind,
subjectArgument.getType(),
constrainingArgument.getType(),
constraintPosition);
}
}