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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.js.translate.intrinsic.operation
import org.jetbrains.kotlin.js.backend.ast.JsExpression
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.js.translate.context.TranslationContext
import org.jetbrains.kotlin.js.translate.utils.BindingUtils.getCallableDescriptorForOperationExpression
import org.jetbrains.kotlin.js.translate.utils.PsiUtils.getOperationToken
import org.jetbrains.kotlin.lexer.KtToken
import org.jetbrains.kotlin.psi.KtBinaryExpression
import org.jetbrains.kotlin.types.KotlinType
interface BinaryOperationIntrinsic {
fun apply(expression: KtBinaryExpression, left: JsExpression, right: JsExpression, context: TranslationContext): JsExpression
fun exists(): Boolean
}
class BinaryOperationIntrinsics {
private val intrinsicCache = mutableMapOf()
private val factories = listOf(LongCompareToBOIF, EqualsBOIF, CompareToBOIF, AssignmentBOIF)
fun getIntrinsic(expression: KtBinaryExpression, context: TranslationContext): BinaryOperationIntrinsic {
val token = getOperationToken(expression)
val descriptor = getCallableDescriptorForOperationExpression(context.bindingContext(), expression)
if (descriptor == null || descriptor !is FunctionDescriptor) {
return NO_INTRINSIC
}
val leftType = expression.left?.let { context.bindingContext().getType(it) }
val rightType = expression.right?.let { context.bindingContext().getType(it) }
val key = IntrinsicKey(token, descriptor, leftType, rightType)
return intrinsicCache.getOrPut(key) { computeIntrinsic(token, descriptor, leftType, rightType) }
}
private fun computeIntrinsic(
token: KtToken, descriptor: FunctionDescriptor,
leftType: KotlinType?, rightType: KotlinType?
): BinaryOperationIntrinsic {
for (factory in factories) {
if (factory.getSupportTokens().contains(token)) {
val intrinsic = factory.getIntrinsic(descriptor, leftType, rightType)
if (intrinsic != null) {
return intrinsic
}
}
}
return NO_INTRINSIC
}
}
private data class IntrinsicKey(
val token: KtToken, val function: FunctionDescriptor,
val leftType: KotlinType?, val rightType: KotlinType?
)
interface BinaryOperationIntrinsicFactory {
fun getSupportTokens(): Set
fun getIntrinsic(descriptor: FunctionDescriptor, leftType: KotlinType?, rightType: KotlinType?): BinaryOperationIntrinsic?
}
abstract class AbstractBinaryOperationIntrinsic : BinaryOperationIntrinsic {
override abstract fun apply(expression: KtBinaryExpression, left: JsExpression, right: JsExpression, context: TranslationContext): JsExpression
override fun exists(): Boolean = true
}
object NO_INTRINSIC : AbstractBinaryOperationIntrinsic() {
override fun exists(): Boolean = false
override fun apply(expression: KtBinaryExpression, left: JsExpression, right: JsExpression, context: TranslationContext): JsExpression =
throw UnsupportedOperationException("BinaryOperationIntrinsic#NO_INTRINSIC_#apply")
}
