// "named" functions can be expressions.
            is KtNamedFunction ->
                doesParentUseChild(psiElement.parent, psiElement)

            // No other declarations are considered expressions
            is KtDeclaration ->
                false

            /**
             * EXPRESSIONS
             */
            // A handful of expression are never considered used:

    }

    override fun getSmartCastedInfo(expression: KtExpression): KtSmartCastInfo? {
        val firSmartCastExpression = getMatchingFirExpressionWithSmartCast(expression) ?: return null
        return getSmartCastedInfo(firSmartCastExpression)
    }

    private fun getSmartCastedInfo(expression: FirSmartCastExpression): KtSmartCastInfo? {
        val type = expression.smartcastType.coneTypeSafe<ConeKotlinType>()?.asKtType() ?: return null

 */

package org.jetbrains.kotlin.idea.references

import org.jetbrains.kotlin.fir.declarations.FirProperty
import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
import org.jetbrains.kotlin.fir.expressions.FirWhileLoop
import org.jetbrains.kotlin.analysis.api.fir.getResolvedSymbolOfNameReference

    override fun evaluate(
        expression: KtExpression,
        mode: KtConstantEvaluationMode,
    ): KtConstantValue? {
        return evaluateFir(expression.getOrBuildFir(firResolveSession), expression, mode)
    }

    override fun evaluateAsAnnotationValue(expression: KtExpression): KtAnnotationValue? =
        (expression.getOrBuildFir(firResolveSession) as? FirExpression)?.let {

            val expression = variableAssignment.psi as? KtExpression

            if (firVariableSymbol is FirVariableSymbol<*> && firVariableSymbol.fir.isLocalMember && expression != null) {
                val variableSymbol = analysisSession.firSymbolBuilder.variableLikeBuilder.buildVariableLikeSymbol(firVariableSymbol)
                val reassignment = VariableReassignment(expression, variableSymbol, variableAssignment.isAugmented())

     *
     * @param receiverExpression a qualified expression receiver (e.g., `foo` in `foo?.bar()`, or in `foo.bar`).
     *
     * The function unwraps certain receiver expressions. For instance, for safe calls direct counterpart to a [KtSafeQualifiedExpression]
     * is (FirCheckedSafeCallSubject)[org.jetbrains.kotlin.fir.expressions.FirCheckedSafeCallSubject] which requires additional unwrapping

import org.jetbrains.kotlin.fir.declarations.FirProperty
import org.jetbrains.kotlin.fir.declarations.FirPropertyAccessor
import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
import org.jetbrains.kotlin.fir.expressions.FirReturnExpression
import org.jetbrains.kotlin.fir.expressions.FirStatement
import org.jetbrains.kotlin.analysis.api.fir.*
import org.jetbrains.kotlin.analysis.low.level.api.fir.api.getOrBuildFirSafe

import org.jetbrains.kotlin.analysis.low.level.api.fir.api.getOrBuildFir
import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
import org.jetbrains.kotlin.fir.references.FirResolvedNamedReference
import org.jetbrains.kotlin.psi.KtArrayAccessExpression

class KtFirArrayAccessReference(
    expression: KtArrayAccessExpression
) : KtArrayAccessReference(expression), KtFirReference {
    override fun KtAnalysisSession.resolveToSymbols(): Collection<KtSymbol> {

class KtFirConstructorDelegationReference(
    expression: KtConstructorDelegationReferenceExpression
) : KtConstructorDelegationReference(expression), KtFirReference {

    override fun KtAnalysisSession.resolveToSymbols(): Collection<KtSymbol> {
        check(this is KtFirAnalysisSession)
        val fir = expression.getOrBuildFirSafe<FirDelegatedConstructorCall>(firResolveSession) ?: return emptyList()

import org.jetbrains.kotlin.fir.declarations.FirTypeParameter
import org.jetbrains.kotlin.fir.declarations.FirValueParameter
import org.jetbrains.kotlin.fir.expressions.FirExpression
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
import org.jetbrains.kotlin.fir.symbols.impl.FirBackingFieldSymbol