org.jetbrains.kotlin.js.translate.intrinsic.functions.factories.StringPlusCharFIF.kt Maven / Gradle / Ivy
/*
* Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.js.translate.intrinsic.functions.factories
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.js.backend.ast.JsBinaryOperation
import org.jetbrains.kotlin.js.backend.ast.JsBinaryOperator
import org.jetbrains.kotlin.js.backend.ast.JsExpression
import org.jetbrains.kotlin.js.translate.callTranslator.CallInfo
import org.jetbrains.kotlin.js.translate.context.TranslationContext
import org.jetbrains.kotlin.js.translate.intrinsic.functions.basic.FunctionIntrinsic
import org.jetbrains.kotlin.js.translate.utils.JsAstUtils
import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
import org.jetbrains.kotlin.types.TypeUtils
object StringPlusCharFIF : FunctionIntrinsicFactory {
private class StringPlusAnyIntrinsic(private val leftTypeNullable: Boolean) : FunctionIntrinsic() {
override fun apply(callInfo: CallInfo, arguments: List, context: TranslationContext): JsExpression {
val receiver = callInfo.dispatchReceiver ?: callInfo.extensionReceiver!!
val rightType = context.bindingContext().getType(callInfo.resolvedCall.call.valueArguments[0].getArgumentExpression()!!)
?: callInfo.resolvedCall.resultingDescriptor.valueParameters[0].type
val rightTypeNullable = TypeUtils.isNullableType(rightType)
val hasNonNullArg = !leftTypeNullable || !rightTypeNullable
val rightExpr = when {
KotlinBuiltIns.isChar(rightType) -> {
JsAstUtils.charToString(arguments[0])
}
KotlinBuiltIns.isStringOrNullableString(rightType) && hasNonNullArg -> {
arguments[0]
}
else -> {
TopLevelFIF.TO_STRING.apply(arguments[0], listOf(), context)
}
}
return JsBinaryOperation(JsBinaryOperator.ADD, receiver, rightExpr)
}
}
override fun getIntrinsic(descriptor: FunctionDescriptor, context: TranslationContext): FunctionIntrinsic? {
val fqName = descriptor.fqNameUnsafe.asString()
if (fqName != "kotlin.String.plus" && fqName != "kotlin.plus") return null
val leftType = (descriptor.dispatchReceiverParameter ?: descriptor.extensionReceiverParameter ?: return null).type
return if (KotlinBuiltIns.isStringOrNullableString(leftType)) {
StringPlusAnyIntrinsic(TypeUtils.isNullableType(leftType))
}
else {
null
}
}
}