001    /*
002     * Copyright 2010-2015 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.kotlin.resolve.calls.checkers;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.kotlin.descriptors.CallableDescriptor;
022    import org.jetbrains.kotlin.descriptors.ClassifierDescriptor;
023    import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor;
024    import org.jetbrains.kotlin.diagnostics.Errors;
025    import org.jetbrains.kotlin.psi.KtExpression;
026    import org.jetbrains.kotlin.resolve.calls.context.BasicCallResolutionContext;
027    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
028    import org.jetbrains.kotlin.types.KotlinType;
029    import org.jetbrains.kotlin.types.typeUtil.TypeUtilsKt;
030    
031    import java.util.Map;
032    
033    public class ReifiedTypeParameterSubstitutionChecker implements CallChecker {
034        @Override
035        public <F extends CallableDescriptor> void check(
036                @NotNull ResolvedCall<F> resolvedCall, @NotNull BasicCallResolutionContext context
037        ) {
038            Map<TypeParameterDescriptor, KotlinType> typeArguments = resolvedCall.getTypeArguments();
039            for (Map.Entry<TypeParameterDescriptor, KotlinType> entry : typeArguments.entrySet()) {
040                TypeParameterDescriptor parameter = entry.getKey();
041                KotlinType argument = entry.getValue();
042                ClassifierDescriptor argumentDeclarationDescription = argument.getConstructor().getDeclarationDescriptor();
043    
044                if (parameter.isReified()) {
045                    if (argumentDeclarationDescription instanceof TypeParameterDescriptor &&
046                        !((TypeParameterDescriptor) argumentDeclarationDescription).isReified()
047                    ) {
048                        context.trace.report(
049                                Errors.TYPE_PARAMETER_AS_REIFIED.on(getCallElement(context), parameter)
050                        );
051                    }
052                    else if (TypeUtilsKt.cannotBeReified(argument)) {
053                        context.trace.report(Errors.REIFIED_TYPE_FORBIDDEN_SUBSTITUTION.on(getCallElement(context), argument));
054                    }
055                }
056            }
057        }
058    
059        @NotNull
060        private static PsiElement getCallElement(@NotNull BasicCallResolutionContext context) {
061            KtExpression callee = context.call.getCalleeExpression();
062            return callee != null ? callee : context.call.getCallElement();
063        }
064    }