org.jetbrains.kotlin.fir.analysis.jvm.checkers.expression.FirInterfaceDefaultMethodCallChecker.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.jvm.checkers.expression

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.FirQualifiedAccessExpressionChecker
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.analysis.jvm.checkers.isCompiledToJvmDefault
import org.jetbrains.kotlin.fir.analysis.jvm.checkers.isJvm6
import org.jetbrains.kotlin.fir.declarations.*
import org.jetbrains.kotlin.fir.declarations.utils.isInterface
import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
import org.jetbrains.kotlin.fir.expressions.toResolvedCallableSymbol
import org.jetbrains.kotlin.fir.java.jvmDefaultModeState
import org.jetbrains.kotlin.fir.references.FirSuperReference
import org.jetbrains.kotlin.fir.resolve.providers.symbolProvider
import org.jetbrains.kotlin.fir.symbols.impl.ANONYMOUS_CLASS_ID
import org.jetbrains.kotlin.fir.symbols.impl.FirRegularClassSymbol
import org.jetbrains.kotlin.fir.symbols.impl.isStatic
import org.jetbrains.kotlin.utils.addToStdlib.safeAs

object FirInterfaceDefaultMethodCallChecker : FirQualifiedAccessExpressionChecker() {
    override fun check(expression: FirQualifiedAccessExpression, context: CheckerContext, reporter: DiagnosticReporter) {
        val symbol = expression.calleeReference.toResolvedCallableSymbol()
        val classId = symbol?.callableId?.classId ?: return
        if (classId.isLocal) return

        fun getTypeSymbol(): FirRegularClassSymbol? {
            return context.session.symbolProvider.getClassLikeSymbolByClassId(classId) as? FirRegularClassSymbol
        }

        val supportsDefaults = !context.isJvm6()
        var typeSymbol: FirRegularClassSymbol? = null
        if (!supportsDefaults && symbol.isStatic) {
            typeSymbol = getTypeSymbol() ?: return
            if (typeSymbol.isInterface && typeSymbol.origin is FirDeclarationOrigin.Java) {
                reporter.reportOn(expression.source, FirJvmErrors.INTERFACE_STATIC_METHOD_CALL_FROM_JAVA6_TARGET, context)
            }
        }

        if (expression.explicitReceiver.safeAs()
                ?.calleeReference.safeAs() == null
        ) {
            return
        }

        val containingDeclaration = context.findClosest() ?: return

        if (typeSymbol == null) typeSymbol = getTypeSymbol() ?: return

        val jvmDefaultMode = context.session.jvmDefaultModeState
        if (typeSymbol.isInterface && (typeSymbol.origin is FirDeclarationOrigin.Java || symbol.isCompiledToJvmDefault(jvmDefaultMode))) {
            if (containingDeclaration.isInterface) {
                val containingMember = context.findContainingMember()?.symbol
                if (containingMember?.isCompiledToJvmDefault(jvmDefaultMode) == false) {
                    reporter.reportOn(expression.source, FirJvmErrors.INTERFACE_CANT_CALL_DEFAULT_METHOD_VIA_SUPER, context)
                    return
                }
            }

            if (!supportsDefaults) {
                reporter.reportOn(expression.source, FirJvmErrors.DEFAULT_METHOD_CALL_FROM_JAVA6_TARGET, context)
            }
        }
    }

    private fun CheckerContext.findContainingMember(): FirCallableDeclaration? {
        return findClosest {
            (it is FirSimpleFunction && it.symbol.callableId.classId != ANONYMOUS_CLASS_ID) || it is FirProperty
        }
    }
}