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/*
 * 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.descriptors;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.name.Name;
import org.jetbrains.kotlin.types.KotlinType;
import org.jetbrains.kotlin.types.TypeSubstitutor;

import java.util.Collection;
import java.util.List;

public interface FunctionDescriptor extends CallableMemberDescriptor {
    @Override
    @NotNull
    DeclarationDescriptor getContainingDeclaration();

    @NotNull
    @Override
    FunctionDescriptor getOriginal();

    @NotNull
    @Override
    FunctionDescriptor substitute(@NotNull TypeSubstitutor substitutor);

    /**
     * This method should be used with q Wgreat care, because if descriptor is substituted one, calling 'getOverriddenDescriptors'
     * may force lazy computation, that's unnecessary in most cases.
     * So, if 'getOriginal().getOverriddenDescriptors()' is enough for you, please use it instead.
     * @return
     */
    @Override
    @NotNull
    Collection getOverriddenDescriptors();

    /**
     * @return descriptor that represents initial signature, e.g in case of result SimpleFunctionDescriptor.createRenamedCopy it returns
     * descriptor before rename
     */
    @Nullable
    FunctionDescriptor getInitialSignatureDescriptor();

    /**
     * @return true if descriptor signature clashed with some other signature and it's supposed to be legal
     * See java.nio.CharBuffer
     */
    boolean isHiddenToOvercomeSignatureClash();

    @NotNull
    @Override
    FunctionDescriptor copy(DeclarationDescriptor newOwner, Modality modality, Visibility visibility, Kind kind, boolean copyOverrides);

    boolean isOperator();

    boolean isInfix();

    boolean isInline();

    boolean isTailrec();

    boolean isExternal();

    @NotNull
    CopyBuilder newCopyBuilder();

    interface CopyBuilder {
        @NotNull
        CopyBuilder setOwner(@NotNull DeclarationDescriptor owner);

        @NotNull
        CopyBuilder setModality(@NotNull Modality modality);

        @NotNull
        CopyBuilder setVisibility(@NotNull Visibility visibility);

        @NotNull
        CopyBuilder setKind(@NotNull Kind kind);

        @NotNull
        CopyBuilder setCopyOverrides(boolean copyOverrides);

        @NotNull
        CopyBuilder setName(@NotNull Name name);

        @NotNull
        CopyBuilder setValueParameters(@NotNull List parameters);

        @NotNull
        CopyBuilder setTypeParameters(@NotNull List parameters);

        @NotNull
        CopyBuilder setReturnType(@NotNull KotlinType type);

        @NotNull
        CopyBuilder setExtensionReceiverType(@Nullable KotlinType type);

        @NotNull
        CopyBuilder setOriginal(@NotNull FunctionDescriptor original);

        @NotNull
        CopyBuilder setSignatureChange();

        @NotNull
        CopyBuilder setPreserveSourceElement();

        @NotNull
        CopyBuilder setDropOriginalInContainingParts();

        @NotNull
        CopyBuilder setHiddenToOvercomeSignatureClash();

        @Nullable
        D build();
    }
}