org.jetbrains.kotlin.backend.common.lower.loops.handlers.DefaultIterableHandler.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2020 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.backend.common.lower.loops.handlers
import org.jetbrains.kotlin.backend.common.CommonBackendContext
import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
import org.jetbrains.kotlin.backend.common.lower.loops.ExpressionHandler
import org.jetbrains.kotlin.backend.common.lower.loops.HeaderInfo
import org.jetbrains.kotlin.backend.common.lower.loops.IterableHeaderInfo
import org.jetbrains.kotlin.ir.builders.createTmpVariable
import org.jetbrains.kotlin.ir.builders.irCall
import org.jetbrains.kotlin.ir.expressions.IrExpression
import org.jetbrains.kotlin.ir.symbols.IrSymbol
import org.jetbrains.kotlin.ir.types.isSubtypeOfClass
import org.jetbrains.kotlin.ir.util.getSimpleFunction
import org.jetbrains.kotlin.util.OperatorNameConventions
/** Builds a [HeaderInfo] for Iterables not handled by more specialized handlers. */
internal class DefaultIterableHandler(private val context: CommonBackendContext) : ExpressionHandler {
private val iterableClassSymbol = context.ir.symbols.iterable
override fun matchIterable(expression: IrExpression) = expression.type.isSubtypeOfClass(iterableClassSymbol)
override fun build(expression: IrExpression, scopeOwner: IrSymbol): HeaderInfo? =
with(context.createIrBuilder(scopeOwner, expression.startOffset, expression.endOffset)) {
val iteratorFun =
iterableClassSymbol.getSimpleFunction(OperatorNameConventions.ITERATOR.asString())!!.owner
IterableHeaderInfo(
scope.createTmpVariable(irCall(iteratorFun).apply { dispatchReceiver = expression }, nameHint = "iterator")
)
}
}