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KCallables.kt
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KCallables.kt
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/*
* 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.
*/
@file:JvmName("KCallables")
package kotlin.reflect.full
import kotlin.reflect.*
/**
* Returns a parameter representing the `this` instance needed to call this callable,
* or `null` if this callable is not a member of a class and thus doesn't take such parameter.
*/
@SinceKotlin("1.1")
val KCallable<*>.instanceParameter: KParameter?
get() = parameters.singleOrNull { it.kind == KParameter.Kind.INSTANCE }
/**
* Returns a parameter representing the extension receiver instance needed to call this callable,
* or `null` if this callable is not an extension.
*/
@SinceKotlin("1.1")
val KCallable<*>.extensionReceiverParameter: KParameter?
get() = parameters.singleOrNull { it.kind == KParameter.Kind.EXTENSION_RECEIVER }
/**
* Returns parameters of this callable, excluding the `this` instance and the extension receiver parameter.
*/
@SinceKotlin("1.1")
val KCallable<*>.valueParameters: List<KParameter>
get() = parameters.filter { it.kind == KParameter.Kind.VALUE }
/**
* Returns the parameter of this callable with the given name, or `null` if there's no such parameter.
*/
@SinceKotlin("1.1")
fun KCallable<*>.findParameterByName(name: String): KParameter? {
return parameters.singleOrNull { it.name == name }
}