org.jetbrains.kotlin.resolve.InfixModifierChecker.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 org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.diagnostics.DiagnosticSink
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.psi.KtDeclaration
import org.jetbrains.kotlin.resolve.descriptorUtil.hasDefaultValue
public class InfixModifierChecker : DeclarationChecker {
override fun check(
declaration: KtDeclaration,
descriptor: DeclarationDescriptor,
diagnosticHolder: DiagnosticSink,
bindingContext: BindingContext
) {
val functionDescriptor = descriptor as? FunctionDescriptor ?: return
if (!functionDescriptor.isInfix) return
val modifier = declaration.modifierList?.getModifier(KtTokens.INFIX_KEYWORD) ?: return
if (!isApplicable(functionDescriptor)) {
diagnosticHolder.report(Errors.INAPPLICABLE_INFIX_MODIFIER.on(modifier))
}
}
private fun isApplicable(descriptor: FunctionDescriptor): Boolean {
if (descriptor.dispatchReceiverParameter == null && descriptor.extensionReceiverParameter == null) return false
if (descriptor.valueParameters.size != 1) return false
val singleParameter = descriptor.valueParameters.first()
return !singleParameter.hasDefaultValue() && singleParameter.varargElementType == null
}
}