/*
 * Copyright 2010-2017 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.js.resolve

import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.psi.KtCallableDeclaration
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.descriptorUtil.isEffectivelyExternal
import org.jetbrains.kotlin.resolve.inline.ReasonableInlineRule

object ExtensionFunctionToExternalIsInlinable : ReasonableInlineRule {
    override fun isInlineReasonable(
            descriptor: CallableMemberDescriptor,
            declaration: KtCallableDeclaration,
            context: BindingContext
    ): Boolean {
        val receiverParameter = descriptor.extensionReceiverParameter ?: return false
        val receiverClass = receiverParameter.value.type.constructor.declarationDescriptor as? ClassDescriptor ?: return false
        return receiverClass.isEffectivelyExternal()
    }
}