org.jetbrains.kotlin.psi.KtDoubleColonExpression.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2016 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.psi
import com.intellij.lang.ASTNode
import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.lexer.KtTokens
abstract class KtDoubleColonExpression(node: ASTNode) : KtExpressionImpl(node) {
val receiverExpression: KtExpression?
get() = node.firstChildNode.psi as? KtExpression
val hasQuestionMarks: Boolean
get() {
for (element in generateSequence(node.firstChildNode, ASTNode::getTreeNext)) {
when (element.elementType) {
KtTokens.QUEST -> return true
KtTokens.COLONCOLON -> return false
}
}
error("Double colon expression must have '::': $text")
}
val doubleColonTokenReference: PsiElement
get() = findChildByType(KtTokens.COLONCOLON)!!
val lhs: PsiElement?
get() = doubleColonTokenReference.prevSibling
fun setReceiverExpression(newReceiverExpression: KtExpression) {
val oldReceiverExpression = this.receiverExpression
oldReceiverExpression?.replace(newReceiverExpression) ?: addBefore(newReceiverExpression, doubleColonTokenReference)
}
val isEmptyLHS: Boolean
get() = lhs == null
override fun accept(visitor: KtVisitor, data: D): R {
return visitor.visitDoubleColonExpression(this, data)
}
}