org.jetbrains.kotlin.types.expressions.PreliminaryDeclarationVisitor.kt Maven / Gradle / Ivy
/*
* 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.types.expressions
import org.jetbrains.kotlin.descriptors.VariableDescriptor
import org.jetbrains.kotlin.psi.KtClassOrObject
import org.jetbrains.kotlin.psi.KtDeclaration
import org.jetbrains.kotlin.psi.KtExpression
import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
import org.jetbrains.kotlin.psi.psiUtil.parentsWithSelf
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.BindingTrace
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils
class PreliminaryDeclarationVisitor(val declaration: KtDeclaration): AssignedVariablesSearcher() {
override fun writers(variableDescriptor: VariableDescriptor): MutableSet {
lazyTrigger
return super.writers(variableDescriptor)
}
private val lazyTrigger by lazy {
declaration.accept(this)
}
companion object {
fun createForExpression(expression: KtExpression, trace: BindingTrace) {
expression.getStrictParentOfType()?.let { createForDeclaration(it, trace) }
}
private fun topMostNonClassDeclaration(declaration: KtDeclaration) =
declaration.parentsWithSelf.filterIsInstance().findLast { it !is KtClassOrObject } ?: declaration
fun createForDeclaration(declaration: KtDeclaration, trace: BindingTrace) {
val visitorOwner = topMostNonClassDeclaration(declaration)
if (trace.get(BindingContext.PRELIMINARY_VISITOR, visitorOwner) != null) return
trace.record(BindingContext.PRELIMINARY_VISITOR, visitorOwner, PreliminaryDeclarationVisitor(visitorOwner))
}
fun getVisitorByVariable(variableDescriptor: VariableDescriptor, bindingContext: BindingContext): PreliminaryDeclarationVisitor? {
// Search for preliminary visitor of parent descriptor
val containingDescriptor = variableDescriptor.containingDeclaration
var currentDeclaration: KtDeclaration? =
DescriptorToSourceUtils.descriptorToDeclaration(containingDescriptor) as? KtDeclaration ?: return null
var preliminaryVisitor = bindingContext.get(BindingContext.PRELIMINARY_VISITOR, currentDeclaration)
while (preliminaryVisitor == null && currentDeclaration != null) {
currentDeclaration = currentDeclaration.getStrictParentOfType()
preliminaryVisitor = bindingContext.get(BindingContext.PRELIMINARY_VISITOR, currentDeclaration)
}
return preliminaryVisitor
}
}
}