org.jetbrains.kotlin.resolve.UnderscoreChecker.kt Maven / Gradle / Ivy
/*
* 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
import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.descriptors.VariableDescriptor
import org.jetbrains.kotlin.diagnostics.DiagnosticSink
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.psi.*
object UnderscoreChecker : DeclarationChecker {
fun checkIdentifier(identifier: PsiElement?, diagnosticHolder: DiagnosticSink) {
if (identifier == null || identifier.text.isEmpty()) return
if (identifier.text.all { it == '_' }) {
diagnosticHolder.report(Errors.UNDERSCORE_IS_RESERVED.on(identifier))
}
}
fun checkNamed(declaration: KtNamedDeclaration, diagnosticHolder: DiagnosticSink) {
checkIdentifier(declaration.nameIdentifier, diagnosticHolder)
}
override fun check(
declaration: KtDeclaration,
descriptor: DeclarationDescriptor,
diagnosticHolder: DiagnosticSink,
bindingContext: BindingContext
) {
if (declaration is KtProperty && descriptor !is VariableDescriptor) return
if (declaration is KtCallableDeclaration) {
for (parameter in declaration.valueParameters) {
checkNamed(parameter, diagnosticHolder)
}
}
if (declaration is KtTypeParameterListOwner) {
for (typeParameter in declaration.typeParameters) {
checkNamed(typeParameter, diagnosticHolder)
}
}
if (declaration !is KtNamedDeclaration) return
checkNamed(declaration, diagnosticHolder)
}
}