001 /*
002 * Copyright 2010-2014 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.jet.lang.resolve.calls.tasks;
018
019 import com.google.common.collect.Sets;
020 import com.intellij.lang.ASTNode;
021 import com.intellij.psi.PsiElement;
022 import org.jetbrains.annotations.NotNull;
023 import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
024 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptorWithVisibility;
025 import org.jetbrains.jet.lang.descriptors.ReceiverParameterDescriptor;
026 import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
027 import org.jetbrains.jet.lang.psi.*;
028 import org.jetbrains.jet.lang.resolve.BindingTrace;
029 import org.jetbrains.jet.lang.resolve.calls.inference.*;
030 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
031 import org.jetbrains.jet.lang.resolve.name.Name;
032 import org.jetbrains.jet.lang.resolve.scopes.receivers.ExpressionReceiver;
033 import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
034 import org.jetbrains.jet.lang.types.JetType;
035 import org.jetbrains.jet.lang.types.Variance;
036 import org.jetbrains.jet.lang.types.expressions.OperatorConventions;
037 import org.jetbrains.jet.lexer.JetToken;
038 import org.jetbrains.jet.lexer.JetTokens;
039
040 import java.util.Collection;
041 import java.util.List;
042
043 import static org.jetbrains.jet.lang.diagnostics.Errors.*;
044 import static org.jetbrains.jet.lang.resolve.BindingContext.AMBIGUOUS_REFERENCE_TARGET;
045 import static org.jetbrains.jet.lang.types.TypeUtils.noExpectedType;
046
047 public abstract class AbstractTracingStrategy implements TracingStrategy {
048 protected final JetExpression reference;
049 protected final Call call;
050
051 protected AbstractTracingStrategy(@NotNull JetExpression reference, @NotNull Call call) {
052 this.reference = reference;
053 this.call = call;
054 }
055
056 @Override
057 public <D extends CallableDescriptor> void recordAmbiguity(@NotNull BindingTrace trace, @NotNull Collection<? extends ResolvedCall<D>> candidates) {
058 Collection<D> descriptors = Sets.newHashSet();
059 for (ResolvedCall<D> candidate : candidates) {
060 descriptors.add(candidate.getCandidateDescriptor());
061 }
062 trace.record(AMBIGUOUS_REFERENCE_TARGET, reference, descriptors);
063 }
064
065 @Override
066 public void noValueForParameter(@NotNull BindingTrace trace, @NotNull ValueParameterDescriptor valueParameter) {
067 JetElement reportOn;
068 JetValueArgumentList valueArgumentList = call.getValueArgumentList();
069 if (valueArgumentList != null) {
070 reportOn = valueArgumentList;
071 }
072 else {
073 reportOn = reference;
074 }
075 trace.report(NO_VALUE_FOR_PARAMETER.on(reportOn, valueParameter));
076 }
077
078 @Override
079 public void missingReceiver(@NotNull BindingTrace trace, @NotNull ReceiverParameterDescriptor expectedReceiver) {
080 trace.report(MISSING_RECEIVER.on(reference, expectedReceiver.getType()));
081 }
082
083 @Override
084 public void wrongReceiverType(@NotNull BindingTrace trace, @NotNull ReceiverParameterDescriptor receiverParameter, @NotNull ReceiverValue receiverArgument) {
085 if (receiverArgument instanceof ExpressionReceiver) {
086 ExpressionReceiver expressionReceiver = (ExpressionReceiver)receiverArgument;
087 trace.report(TYPE_MISMATCH.on(expressionReceiver.getExpression(), receiverParameter.getType(), receiverArgument.getType()));
088 }
089 else {
090 trace.report(TYPE_MISMATCH.on(reference, receiverParameter.getType(), receiverArgument.getType()));
091 }
092 }
093
094 @Override
095 public void noReceiverAllowed(@NotNull BindingTrace trace) {
096 trace.report(NO_RECEIVER_ADMITTED.on(reference));
097 }
098
099 @Override
100 public void wrongNumberOfTypeArguments(@NotNull BindingTrace trace, int expectedTypeArgumentCount) {
101 JetTypeArgumentList typeArgumentList = call.getTypeArgumentList();
102 if (typeArgumentList != null) {
103 trace.report(WRONG_NUMBER_OF_TYPE_ARGUMENTS.on(typeArgumentList, expectedTypeArgumentCount));
104 }
105 else {
106 trace.report(WRONG_NUMBER_OF_TYPE_ARGUMENTS.on(reference, expectedTypeArgumentCount));
107 }
108 }
109
110 @Override
111 public <D extends CallableDescriptor> void ambiguity(@NotNull BindingTrace trace, @NotNull Collection<? extends ResolvedCall<D>> descriptors) {
112 trace.report(OVERLOAD_RESOLUTION_AMBIGUITY.on(reference, descriptors));
113 }
114
115 @Override
116 public <D extends CallableDescriptor> void noneApplicable(@NotNull BindingTrace trace, @NotNull Collection<? extends ResolvedCall<D>> descriptors) {
117 trace.report(NONE_APPLICABLE.on(reference, descriptors));
118 }
119
120 @Override
121 public <D extends CallableDescriptor> void cannotCompleteResolve(
122 @NotNull BindingTrace trace,
123 @NotNull Collection<? extends ResolvedCall<D>> descriptors
124 ) {
125 trace.report(CANNOT_COMPLETE_RESOLVE.on(reference, descriptors));
126 }
127
128 @Override
129 public void instantiationOfAbstractClass(@NotNull BindingTrace trace) {
130 trace.report(CREATING_AN_INSTANCE_OF_ABSTRACT_CLASS.on(call.getCallElement()));
131 }
132
133 @Override
134 public void unsafeCall(@NotNull BindingTrace trace, @NotNull JetType type, boolean isCallForImplicitInvoke) {
135 ASTNode callOperationNode = call.getCallOperationNode();
136 if (callOperationNode != null && !isCallForImplicitInvoke) {
137 trace.report(UNSAFE_CALL.on(callOperationNode.getPsi(), type));
138 }
139 else {
140 PsiElement callElement = call.getCallElement();
141 if (callElement instanceof JetBinaryExpression) {
142 JetBinaryExpression binaryExpression = (JetBinaryExpression)callElement;
143 JetSimpleNameExpression operationReference = binaryExpression.getOperationReference();
144
145 Name operationString = operationReference.getReferencedNameElementType() == JetTokens.IDENTIFIER ?
146 Name.identifier(operationReference.getText()) :
147 OperatorConventions.getNameForOperationSymbol((JetToken) operationReference.getReferencedNameElementType());
148
149 JetExpression left = binaryExpression.getLeft();
150 JetExpression right = binaryExpression.getRight();
151 if (left != null && right != null) {
152 trace.report(UNSAFE_INFIX_CALL.on(reference, left.getText(), operationString.asString(), right.getText()));
153 }
154 }
155 else {
156 trace.report(UNSAFE_CALL.on(reference, type));
157 }
158 }
159 }
160
161 @Override
162 public void unnecessarySafeCall(@NotNull BindingTrace trace, @NotNull JetType type) {
163 ASTNode callOperationNode = call.getCallOperationNode();
164 assert callOperationNode != null;
165 trace.report(UNNECESSARY_SAFE_CALL.on(callOperationNode.getPsi(), type));
166 }
167
168 @Override
169 public void danglingFunctionLiteralArgumentSuspected(@NotNull BindingTrace trace, @NotNull List<JetFunctionLiteralArgument> functionLiteralArguments) {
170 for (JetFunctionLiteralArgument functionLiteralArgument : functionLiteralArguments) {
171 trace.report(DANGLING_FUNCTION_LITERAL_ARGUMENT_SUSPECTED.on(functionLiteralArgument.getArgumentExpression()));
172 }
173 }
174
175 @Override
176 public void invisibleMember(@NotNull BindingTrace trace, @NotNull DeclarationDescriptorWithVisibility descriptor) {
177 trace.report(INVISIBLE_MEMBER.on(call.getCallElement(), descriptor, descriptor.getVisibility(), descriptor.getContainingDeclaration()));
178 }
179
180 @Override
181 public void typeInferenceFailed(@NotNull BindingTrace trace, @NotNull InferenceErrorData data) {
182 ConstraintSystem constraintSystem = data.constraintSystem;
183 ConstraintSystemStatus status = constraintSystem.getStatus();
184 assert !status.isSuccessful() : "Report error only for not successful constraint system";
185
186 if (status.hasErrorInConstrainingTypes()) {
187 // Do not report type inference errors if there is one in the arguments
188 // (it's useful, when the arguments, e.g. lambdas or calls are incomplete)
189 return;
190 }
191 if (status.hasOnlyErrorsFromPosition(ConstraintPosition.EXPECTED_TYPE_POSITION)) {
192 JetType declaredReturnType = data.descriptor.getReturnType();
193 if (declaredReturnType == null) return;
194
195 ConstraintSystem systemWithoutExpectedTypeConstraint =
196 ((ConstraintSystemImpl) constraintSystem).filterConstraintsOut(ConstraintPosition.EXPECTED_TYPE_POSITION);
197 JetType substitutedReturnType = systemWithoutExpectedTypeConstraint.getResultingSubstitutor().substitute(declaredReturnType, Variance.INVARIANT);
198 assert substitutedReturnType != null; //todo
199
200 assert !noExpectedType(data.expectedType) : "Expected type doesn't exist, but there is an expected type mismatch error";
201 trace.report(TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH.on(reference, data.expectedType, substitutedReturnType));
202 }
203 else if (status.hasViolatedUpperBound()) {
204 trace.report(TYPE_INFERENCE_UPPER_BOUND_VIOLATED.on(reference, data));
205 }
206 else if (status.hasTypeConstructorMismatch()) {
207 trace.report(TYPE_INFERENCE_TYPE_CONSTRUCTOR_MISMATCH.on(reference, data));
208 }
209 else if (status.hasConflictingConstraints()) {
210 trace.report(TYPE_INFERENCE_CONFLICTING_SUBSTITUTIONS.on(reference, data));
211 }
212 else {
213 assert status.hasUnknownParameters();
214 trace.report(TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER.on(reference, data));
215 }
216 }
217
218 }