org.jetbrains.kotlin.fir.analysis.checkers.expression.FirSpreadOfNullableChecker.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.checkers.expression
import org.jetbrains.kotlin.KtSourceElement
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.expressions.FirExpression
import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
import org.jetbrains.kotlin.fir.expressions.FirSpreadArgumentExpression
import org.jetbrains.kotlin.fir.expressions.FirVarargArgumentsExpression
import org.jetbrains.kotlin.fir.types.ConeFlexibleType
import org.jetbrains.kotlin.fir.types.canBeNull
import org.jetbrains.kotlin.fir.types.coneType
object FirSpreadOfNullableChecker : FirFunctionCallChecker() {
override fun check(expression: FirFunctionCall, context: CheckerContext, reporter: DiagnosticReporter) {
fun checkAndReport(argument: FirExpression, source: KtSourceElement?) {
val argumentTypeRef = argument.typeRef
if (argument is FirSpreadArgumentExpression && argumentTypeRef.coneType !is ConeFlexibleType && argumentTypeRef.canBeNull) {
reporter.reportOn(source, FirErrors.SPREAD_OF_NULLABLE, context)
}
}
for (argument in expression.argumentList.arguments) {
if (argument is FirVarargArgumentsExpression) {
for (subArgument in argument.arguments) {
checkAndReport(subArgument, argument.source)
}
} else {
checkAndReport(argument, argument.source)
}
}
}
}