org.jetbrains.kotlin.fir.analysis.checkers.declaration.FirMemberFunctionsChecker.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.declaration
import org.jetbrains.kotlin.KtFakeSourceElementKind
import org.jetbrains.kotlin.descriptors.Visibilities
import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
import org.jetbrains.kotlin.diagnostics.reportOn
import org.jetbrains.kotlin.fir.analysis.checkers.contains
import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
import org.jetbrains.kotlin.fir.analysis.checkers.getModifierList
import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
import org.jetbrains.kotlin.fir.declarations.FirClass
import org.jetbrains.kotlin.fir.declarations.FirRegularClass
import org.jetbrains.kotlin.fir.declarations.FirSimpleFunction
import org.jetbrains.kotlin.fir.declarations.utils.*
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.utils.addToStdlib.lastIsInstanceOrNull
// See old FE's [DeclarationsChecker]
object FirMemberFunctionsChecker : FirSimpleFunctionChecker() {
override fun check(declaration: FirSimpleFunction, context: CheckerContext, reporter: DiagnosticReporter) {
val containingDeclaration = context.containingDeclarations.lastIsInstanceOrNull() ?: return
checkFunction(containingDeclaration, declaration, context, reporter)
}
private fun checkFunction(
containingDeclaration: FirClass,
function: FirSimpleFunction,
context: CheckerContext,
reporter: DiagnosticReporter
) {
val source = function.source ?: return
if (source.kind is KtFakeSourceElementKind) return
val functionSymbol = function.symbol
// If multiple (potentially conflicting) modality modifiers are specified, not all modifiers are recorded at `status`.
// So, our source of truth should be the full modifier list retrieved from the source.
val modifierList = source.getModifierList()
val hasAbstractModifier = KtTokens.ABSTRACT_KEYWORD in modifierList
val isAbstract = function.isAbstract || hasAbstractModifier
if (isAbstract) {
if (containingDeclaration is FirRegularClass && !containingDeclaration.canHaveAbstractDeclaration) {
reporter.reportOn(
source,
FirErrors.ABSTRACT_FUNCTION_IN_NON_ABSTRACT_CLASS,
functionSymbol,
containingDeclaration.symbol,
context
)
}
if (function.hasBody) {
reporter.reportOn(source, FirErrors.ABSTRACT_FUNCTION_WITH_BODY, functionSymbol, context)
}
}
val isInsideExpectClass = isInsideExpectClass(containingDeclaration, context)
val isInsideExternal = isInsideExternalClass(containingDeclaration, context)
val hasOpenModifier = KtTokens.OPEN_KEYWORD in modifierList
if (!function.hasBody) {
if (containingDeclaration.isInterface) {
if (Visibilities.isPrivate(function.visibility)) {
reporter.reportOn(source, FirErrors.PRIVATE_FUNCTION_WITH_NO_BODY, functionSymbol, context)
}
if (!isInsideExpectClass && !hasAbstractModifier && hasOpenModifier) {
reporter.reportOn(source, FirErrors.REDUNDANT_OPEN_IN_INTERFACE, context)
}
} else if (!isInsideExpectClass && !hasAbstractModifier && !function.isExternal && !isInsideExternal) {
reporter.reportOn(source, FirErrors.NON_ABSTRACT_FUNCTION_WITH_NO_BODY, functionSymbol, context)
}
}
checkExpectDeclarationVisibilityAndBody(function, source, reporter, context)
}
}