org.jetbrains.kotlin.resolve.calls.checkers.SafeCallChecker.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.resolve.calls.checkers

import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.calls.tasks.ExplicitReceiverKind

class SafeCallChecker : CallChecker {
    override fun check(resolvedCall: ResolvedCall<*>, reportOn: PsiElement, context: CallCheckerContext) {
        val operationNode = resolvedCall.call.callOperationNode ?: return

        if (operationNode.elementType == KtTokens.SAFE_ACCESS &&
            resolvedCall.explicitReceiverKind == ExplicitReceiverKind.NO_EXPLICIT_RECEIVER) {
            context.trace.report(Errors.UNEXPECTED_SAFE_CALL.on(operationNode.psi))
        }
    }
}