org.jetbrains.kotlin.resolve.checkers.DataClassDeclarationChecker.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2016 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.checkers
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.psi.KtClassOrObject
import org.jetbrains.kotlin.psi.KtDeclaration
class DataClassDeclarationChecker : DeclarationChecker {
override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
if (descriptor !is ClassDescriptor) return
if (declaration !is KtClassOrObject) return
if (descriptor.isData) {
if (descriptor.unsubstitutedPrimaryConstructor == null && descriptor.constructors.isNotEmpty()) {
declaration.nameIdentifier?.let { context.trace.report(Errors.PRIMARY_CONSTRUCTOR_REQUIRED_FOR_DATA_CLASS.on(it)) }
}
val primaryConstructor = declaration.primaryConstructor
val parameters = primaryConstructor?.valueParameters ?: emptyList()
if (parameters.isEmpty()) {
(primaryConstructor?.valueParameterList ?: declaration.nameIdentifier)?.let {
context.trace.report(Errors.DATA_CLASS_WITHOUT_PARAMETERS.on(it))
}
}
for (parameter in parameters) {
if (parameter.isVarArg) {
context.trace.report(Errors.DATA_CLASS_VARARG_PARAMETER.on(parameter))
}
if (!parameter.hasValOrVar()) {
context.trace.report(Errors.DATA_CLASS_NOT_PROPERTY_PARAMETER.on(parameter))
}
}
}
}
}