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• FirWhenExpression.kt

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org.jetbrains.kotlin.fir.expressions.FirWhenExpression.kt Maven / Gradle / Ivy

/*
 * Copyright 2010-2019 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.fir.expressions

import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.fir.visitors.FirTransformer
import org.jetbrains.kotlin.fir.visitors.FirVisitor

abstract class FirWhenExpression(psi: PsiElement?) : FirCallLikeControlFlowExpression(psi) {
    abstract val subject: FirExpression?

    // when (val subjectVariable = subject()) { ... }
    abstract val subjectVariable: FirVariable<*>?

    abstract val branches: List

    override fun  accept(visitor: FirVisitor, data: D): R =
        visitor.visitWhenExpression(this, data)

    override fun  acceptChildren(visitor: FirVisitor, data: D) {
        calleeReference.accept(visitor, data)
        subjectVariable?.accept(visitor, data) ?: subject?.accept(visitor, data)
        for (branch in branches) {
            branch.accept(visitor, data)
        }
        super.acceptChildren(visitor, data)
    }

    abstract fun  transformBranches(transformer: FirTransformer, data: D): FirWhenExpression

    abstract fun  transformSubject(transformer: FirTransformer, data: D): FirWhenExpression
}