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.descriptors;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.annotations.Nullable;
021    import org.jetbrains.kotlin.types.KotlinType;
022    import org.jetbrains.kotlin.types.TypeSubstitutor;
023    
024    import java.util.Collection;
025    import java.util.List;
026    
027    public interface CallableDescriptor extends DeclarationDescriptorWithVisibility, DeclarationDescriptorNonRoot {
028        @Nullable
029        ReceiverParameterDescriptor getExtensionReceiverParameter();
030    
031        @Nullable
032        ReceiverParameterDescriptor getDispatchReceiverParameter();
033    
034        @NotNull
035        List<TypeParameterDescriptor> getTypeParameters();
036    
037        /**
038         * Method may return null for not yet fully initialized object or if error occurred.
039         */
040        @Nullable
041        KotlinType getReturnType();
042    
043        @NotNull
044        @Override
045        CallableDescriptor getOriginal();
046    
047        @Override
048        CallableDescriptor substitute(@NotNull TypeSubstitutor substitutor);
049    
050        @NotNull
051        List<ValueParameterDescriptor> getValueParameters();
052    
053        /**
054         * Kotlin functions always have stable parameter names that can be reliably used when calling them with named arguments.
055         * Functions loaded from platform definitions (e.g. Java binaries or JS) may have unstable parameter names that vary from
056         * one platform installation to another. These names can not be used reliably for calls with named arguments.
057         */
058        boolean hasStableParameterNames();
059    
060        /**
061         * Sometimes parameter names are not available at all (e.g. Java binaries with not enough debug information).
062         * In this case, getName() returns synthetic names such as "p0", "p1" etc.
063         */
064        boolean hasSynthesizedParameterNames();
065    
066        @NotNull
067        Collection<? extends CallableDescriptor> getOverriddenDescriptors();
068    }