org.jetbrains.kotlin.fir.analysis.checkers.expression.FirSealedClassConstructorCallChecker.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2021 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.analysis.checkers.expression

import org.jetbrains.kotlin.descriptors.Modality
import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
import org.jetbrains.kotlin.diagnostics.reportOn
import org.jetbrains.kotlin.fir.declarations.utils.modality
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
import org.jetbrains.kotlin.fir.references.FirResolvedNamedReference
import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
import org.jetbrains.kotlin.fir.resolve.toSymbol
import org.jetbrains.kotlin.fir.symbols.impl.FirConstructorSymbol
import org.jetbrains.kotlin.fir.symbols.impl.FirRegularClassSymbol
import org.jetbrains.kotlin.fir.types.ConeClassLikeType
import org.jetbrains.kotlin.fir.types.coneType
import org.jetbrains.kotlin.utils.addToStdlib.safeAs

object FirSealedClassConstructorCallChecker : FirQualifiedAccessExpressionChecker() {
    override fun check(expression: FirQualifiedAccessExpression, context: CheckerContext, reporter: DiagnosticReporter) {
        val constructorSymbol = expression.calleeReference.safeAs()
            ?.resolvedSymbol as? FirConstructorSymbol
            ?: return

        val typeSymbol = constructorSymbol.resolvedReturnTypeRef.coneType
            .fullyExpandedType(context.session)
            .safeAs()
            ?.lookupTag?.toSymbol(context.session) as? FirRegularClassSymbol
            ?: return

        if (typeSymbol.modality == Modality.SEALED) {
            reporter.reportOn(expression.source, FirErrors.SEALED_CLASS_CONSTRUCTOR_CALL, context)
        }
    }
}