MyGUI_Macros.h

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */
 
#ifndef MYGUI_MACROS_H_
#define MYGUI_MACROS_H_
 
#include "MyGUI_Prerequest.h"
#include <limits>
#include <cstddef>
#include <cstdint>
#include <string_view>
 
namespace MyGUI
{
 
    constexpr size_t ITEM_NONE = (std::numeric_limits<size_t>::max)();
    constexpr float ALPHA_MAX = 1.0f;
    constexpr float ALPHA_MIN = 0.0f;
 
    constexpr unsigned int MYGUI_FLAG_NONE = 0;
    constexpr unsigned int MYGUI_FLAG(uint8_t num)
    {
        return 1U << num;
    }
 
    template<class Map, class Value>
    inline void mapSet(Map& map, std::string_view key, const Value& value)
    {
        auto it = map.find(key);
        if (it == map.end())
            map.emplace(key, value);
        else
            it->second = value;
    }
 
} // namespace MyGUI
 
#endif // MYGUI_MACROS_H_