com/android/internal/util/function/pooled/ArgumentPlaceholder.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * 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 com.android.internal.util.function.pooled;

/**
 * A placeholder for an argument of type {@code R}
 *
 * @see PooledLambda
 * @hide
 */
public final class ArgumentPlaceholder<R> {
    private ArgumentPlaceholder() {}
    static final ArgumentPlaceholder<?> INSTANCE = new ArgumentPlaceholder<>();

    @Override
    public String toString() {
        return "_";
    }
}