CopiedSharedPtr.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2020 Bruno Van de Velde (vdv_b@tgui.eu)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
//    you must not claim that you wrote the original software.
//    If you use this software in a product, an acknowledgment
//    in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
//    and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
 
 
#ifndef TGUI_COPIED_SHARED_PTR_HPP
#define TGUI_COPIED_SHARED_PTR_HPP
 
 
#include <memory>
 
 
namespace tgui
{
 
    template <typename WidgetType>
    class CopiedSharedPtr
    {
    public:
 
        template <typename... Args>
        CopiedSharedPtr(Args&&... args) noexcept
            : m_WidgetPtr{std::make_shared<WidgetType>(std::forward<Args>(args)...)}
        {
        }
 
        CopiedSharedPtr(const CopiedSharedPtr& other) noexcept
            : m_WidgetPtr{std::make_shared<WidgetType>(*other.m_WidgetPtr)}
        {
        }
 
        CopiedSharedPtr(CopiedSharedPtr&& other) noexcept
            : m_WidgetPtr{std::move(other.m_WidgetPtr)}
        {
        }
 
        CopiedSharedPtr& operator=(const CopiedSharedPtr& other) noexcept
        {
            if (&other != this)
                m_WidgetPtr = std::make_shared<WidgetType>(*other.m_WidgetPtr);
 
            return *this;
        }
 
        CopiedSharedPtr& operator=(CopiedSharedPtr&& other) noexcept
        {
            if (&other != this)
                m_WidgetPtr = std::move(other.m_WidgetPtr);
 
            return *this;
        }
 
        operator bool() const noexcept
        {
            return (m_WidgetPtr != nullptr);
        }
 
        WidgetType& operator*() const noexcept
        {
            return *m_WidgetPtr;
        }
 
        WidgetType* operator->() const noexcept
        {
            return m_WidgetPtr.get();
        }
 
        WidgetType* get() const noexcept
        {
            return m_WidgetPtr.get();
        }
 
    private:
 
        std::shared_ptr<WidgetType> m_WidgetPtr;
    };
 
 
}
 
 
#endif // TGUI_COPIED_SHARED_PTR_HPP