org.jetbrains.kotlin.fir.analysis.jvm.checkers.expression.FirJvmProtectedInSuperClassCompanionCallChecker.kt Maven / Gradle / Ivy
/*
* 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.jvm.checkers.expression
import org.jetbrains.kotlin.descriptors.Visibilities
import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
import org.jetbrains.kotlin.fir.analysis.checkers.context.findClosest
import org.jetbrains.kotlin.fir.analysis.checkers.expression.FirQualifiedAccessChecker
import org.jetbrains.kotlin.fir.analysis.checkers.getContainingDeclarationSymbol
import org.jetbrains.kotlin.fir.analysis.checkers.toRegularClassSymbol
import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
import org.jetbrains.kotlin.fir.analysis.diagnostics.jvm.FirJvmErrors
import org.jetbrains.kotlin.diagnostics.reportOn
import org.jetbrains.kotlin.fir.declarations.FirClass
import org.jetbrains.kotlin.fir.declarations.getAnnotationByClassId
import org.jetbrains.kotlin.fir.declarations.utils.isCompanion
import org.jetbrains.kotlin.fir.declarations.utils.visibility
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccess
import org.jetbrains.kotlin.fir.expressions.FirVariableAssignment
import org.jetbrains.kotlin.fir.expressions.impl.FirNoReceiverExpression
import org.jetbrains.kotlin.fir.expressions.toResolvedCallableSymbol
import org.jetbrains.kotlin.fir.resolve.defaultType
import org.jetbrains.kotlin.fir.symbols.impl.FirPropertySymbol
import org.jetbrains.kotlin.fir.symbols.impl.FirRegularClassSymbol
import org.jetbrains.kotlin.fir.types.typeContext
import org.jetbrains.kotlin.resolve.annotations.JVM_STATIC_ANNOTATION_CLASS_ID
import org.jetbrains.kotlin.types.AbstractTypeChecker
object FirJvmProtectedInSuperClassCompanionCallChecker : FirQualifiedAccessChecker() {
override fun check(expression: FirQualifiedAccess, context: CheckerContext, reporter: DiagnosticReporter) {
val dispatchReceiver = expression.dispatchReceiver
if (dispatchReceiver is FirNoReceiverExpression) return
val dispatchClassSymbol = dispatchReceiver.typeRef.toRegularClassSymbol(context.session) ?: return
val resolvedSymbol = expression.calleeReference.toResolvedCallableSymbol() ?: return
val visibility = if (resolvedSymbol is FirPropertySymbol) {
if (expression is FirVariableAssignment)
resolvedSymbol.setterSymbol?.visibility ?: resolvedSymbol.visibility
else
resolvedSymbol.getterSymbol?.visibility ?: resolvedSymbol.visibility
} else {
resolvedSymbol.visibility
}
if (visibility != Visibilities.Protected) return
if (resolvedSymbol.getAnnotationByClassId(JVM_STATIC_ANNOTATION_CLASS_ID) != null) return
if (!dispatchClassSymbol.isCompanion) return
val companionContainingClassSymbol =
dispatchClassSymbol.getContainingDeclarationSymbol(context.session) as? FirRegularClassSymbol ?: return
// Called from within a derived class
val companionContainingType = companionContainingClassSymbol.defaultType()
if (context.findClosest {
AbstractTypeChecker.isSubtypeOf(context.session.typeContext, it.symbol.defaultType(), companionContainingType)
} == null
) {
return
}
// Called not within the same companion object or its owner class
if (context.findClosest {
it.symbol == dispatchClassSymbol || it.symbol == companionContainingClassSymbol
} == null
) {
reporter.reportOn(expression.calleeReference.source, FirJvmErrors.SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC, context)
}
}
}