org.jetbrains.kotlin.codegen.writeAnnotationUtil.kt Maven / Gradle / Ivy

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the Kotlin compiler

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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.codegen

import org.jetbrains.kotlin.codegen.state.GenerationState
import org.jetbrains.kotlin.config.KotlinCompilerVersion
import org.jetbrains.kotlin.config.LanguageVersion
import org.jetbrains.kotlin.load.java.JvmAnnotationNames
import org.jetbrains.kotlin.load.java.JvmBytecodeBinaryVersion
import org.jetbrains.kotlin.load.kotlin.JvmMetadataVersion
import org.jetbrains.kotlin.load.kotlin.header.KotlinClassHeader
import org.jetbrains.org.objectweb.asm.AnnotationVisitor

fun writeKotlinMetadata(
        cb: ClassBuilder,
        state: GenerationState,
        kind: KotlinClassHeader.Kind,
        extraFlags: Int,
        action: (AnnotationVisitor) -> Unit
) {
    val av = cb.newAnnotation(JvmAnnotationNames.METADATA_DESC, true)
    av.visit(JvmAnnotationNames.METADATA_VERSION_FIELD_NAME, JvmMetadataVersion.INSTANCE.toArray())
    av.visit(JvmAnnotationNames.BYTECODE_VERSION_FIELD_NAME, JvmBytecodeBinaryVersion.INSTANCE.toArray())
    av.visit(JvmAnnotationNames.KIND_FIELD_NAME, kind.id)
    var flags = extraFlags
    if (KotlinCompilerVersion.isPreRelease() && state.languageVersionSettings.languageVersion == LanguageVersion.LATEST_STABLE) {
        flags = flags or JvmAnnotationNames.METADATA_PRE_RELEASE_FLAG
    }
    if (flags != 0) {
        av.visit(JvmAnnotationNames.METADATA_EXTRA_INT_FIELD_NAME, flags)
    }
    action(av)
    av.visitEnd()
}

fun writeSyntheticClassMetadata(cb: ClassBuilder, state: GenerationState) {
    writeKotlinMetadata(cb, state, KotlinClassHeader.Kind.SYNTHETIC_CLASS, 0) { _ ->
        // Do nothing
    }
}