org.jetbrains.kotlin.resolve.jvm.checkers.InlinePlatformCompatibilityChecker.kt Maven / Gradle / Ivy

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/*
 * 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.resolve.jvm.checkers

import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.config.JvmTarget
import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
import org.jetbrains.kotlin.descriptors.ClassOrPackageFragmentDescriptor
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.descriptors.PropertyDescriptor
import org.jetbrains.kotlin.load.kotlin.FileBasedKotlinClass
import org.jetbrains.kotlin.load.kotlin.KotlinJvmBinaryPackageSourceElement
import org.jetbrains.kotlin.load.kotlin.KotlinJvmBinarySourceElement
import org.jetbrains.kotlin.resolve.DescriptorUtils
import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
import org.jetbrains.kotlin.resolve.calls.checkers.CallCheckerContext
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.inline.InlineUtil
import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm
import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedCallableMemberDescriptor

class InlinePlatformCompatibilityChecker(val jvmTarget: JvmTarget) : CallChecker {
    private val doCheck = doCheck()

    override fun check(resolvedCall: ResolvedCall<*>, reportOn: PsiElement, context: CallCheckerContext) {
        if (!doCheck) return

        val resultingDescriptor = resolvedCall.resultingDescriptor as? CallableMemberDescriptor ?: return
        if (!InlineUtil.isInline(resultingDescriptor)) {
            if (resultingDescriptor is PropertyDescriptor && InlineUtil.isInline(resultingDescriptor.getter)) {
            //TODO: we should distinguish setter usage from getter one, now we could report wrong diagnostic on non-inline setter
            //var prop: Int
            // inline get
            // set
            //
            // prop  - resolved call with property descriptor and we should report error
            // prop = 1 - resolved call with setter for whole expression and property descriptor for left part,
            //              so we couldn't distinguish is this expression for setter or for getter and will report wrong diagnostic
            }
            else {
                return
            }
        }

        val propertyOrFun = DescriptorUtils.getDirectMember(resultingDescriptor)
        val inliningBytecodeVersion = getBytecodeVersionIfDeserializedDescriptor(propertyOrFun) ?: return

        val compilingBytecodeVersion = jvmTarget.bytecodeVersion
        if (compilingBytecodeVersion < inliningBytecodeVersion) {
            context.trace.report(ErrorsJvm.INLINE_FROM_HIGHER_PLATFORM.on(
                    reportOn,
                    JvmTarget.getDescription(inliningBytecodeVersion),
                    JvmTarget.getDescription(compilingBytecodeVersion)
            ))
        }
    }

    companion object {
        fun doCheck() = "true" != System.getProperty("kotlin.skip.bytecode.version.check")

        fun getBytecodeVersionIfDeserializedDescriptor(funOrProperty: DeclarationDescriptor): Int? {
            if (funOrProperty !is DeserializedCallableMemberDescriptor) return null

            val containingDeclaration = funOrProperty.containingDeclaration as ClassOrPackageFragmentDescriptor

            val source = containingDeclaration.source
            val binaryClass =
                    when (source) {
                        is KotlinJvmBinarySourceElement -> source.binaryClass
                        is KotlinJvmBinaryPackageSourceElement -> source.getContainingBinaryClass(funOrProperty)
                        else -> null
                    } as? FileBasedKotlinClass ?: return null

            return binaryClass.classVersion
        }
    }
}