A better boolean type with C++11

bool.hpp

// Copyright (c) 2015, Jonathan Mercier-Ganady
// All rights reserved.
// See the LICENSE file for more details.

#pragma once

#include <ostream>
 
class Bool final
{
public:
    explicit constexpr Bool(bool value = false): m_value(value) {}
 
    explicit constexpr operator bool() const { return m_value; }
 
    constexpr Bool operator!() const { return Bool{!m_value}; }
 
private:
    bool m_value{false};
};
 
constexpr Bool False{};
constexpr Bool True{!False};
 
inline Bool operator==(Bool a, Bool b)
{
    return (static_cast<bool>(a) == static_cast<bool>(b)) ? True : False;
}
 
inline Bool operator!=(Bool a, Bool b)
{
    return !(a == b);
}
 
inline std::ostream &operator<<(std::ostream &stream, Bool a)
{
    stream << (a ? "True" : "False");
 
    return stream;
}

LICENSE

Copyright (c) 2015, Jonathan Mercier-Ganady
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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