unary_operators.h

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/*
 * Copyright 2026 MusicScience37 (Kenta Kabashima)
 *
 * 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.
 */
#pragma once
 
#include <string_view>
 
#include "func_sketch/common_types.h"
 
namespace func_sketch::math {

class UnaryPlusOperator {
public:
    [[nodiscard]] static std::string_view name() noexcept { return "identity"; }

    static void operator()(const Number& arg, Number& result) noexcept {
        result = arg;
    }
};

class UnaryMinusOperator {
public:
    [[nodiscard]] static std::string_view name() noexcept { return "negate"; }

    static void operator()(const Number& arg, Number& result) {
        std::visit([&result](const auto& value) { result = -value; }, arg);
    }
};
 
}  // namespace func_sketch::math