plugins/kotlin/analysis/src/org/jetbrains/kotlin/idea/references/KtForLoopInReferenceDescriptorsImpl.kt


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// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.

package org.jetbrains.kotlin.idea.references

import com.intellij.openapi.util.TextRange
import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.psi.KtForExpression
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.util.OperatorNameConventions

class KtForLoopInReferenceDescriptorsImpl(
    element: KtForExpression
) : KtForLoopInReference(element), KtDescriptorsBasedReference {
    override fun isReferenceTo(element: PsiElement): Boolean =
        super<KtDescriptorsBasedReference>.isReferenceTo(element)

    override fun getTargetDescriptors(context: BindingContext): Collection<DeclarationDescriptor> {
        val loopRange = expression.loopRange ?: return emptyList()
        return LOOP_RANGE_KEYS.mapNotNull { key -> context.get(key, loopRange)?.candidateDescriptor }
    }

    companion object {
        private val LOOP_RANGE_KEYS = arrayOf(
            BindingContext.LOOP_RANGE_ITERATOR_RESOLVED_CALL,
            BindingContext.LOOP_RANGE_NEXT_RESOLVED_CALL,
            BindingContext.LOOP_RANGE_HAS_NEXT_RESOLVED_CALL
        )
    }
}