invalid.h

/*
 * Copyright 2022 Adobe. All rights reserved.
 * This file is licensed to you 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 REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
#pragma once
 
#include <cmath>
#include <limits>
#include <type_traits>
 
namespace lagrange {
 
 
template <typename T>
constexpr T invalid()
{
    static_assert(!std::is_same_v<T, bool>, "Do not use invalid<bool>() !");
    static_assert(std::is_arithmetic_v<T>, "invalid<T> is only supported for arithmetic types");
    if constexpr (std::numeric_limits<T>::has_infinity) {
        return std::numeric_limits<T>::infinity();
    } else {
        return std::numeric_limits<T>::max();
    }
}
 
 
} // namespace lagrange