[babeltrace.git] / src / cpp-common / bt2 / borrowed-object-proxy.hpp

/*
 * Copyright (c) 2023 Philippe Proulx <pproulx@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 */

#ifndef BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP
#define BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP

namespace bt2 {

/*
 * A proxy containing a valid borrowed object instance of `ObjT` to make
 * Something::operator->() work when only a libbabeltrace2 object
 * pointer is available.
 */
template <typename ObjT>
class BorrowedObjectProxy final
{
public:
    explicit BorrowedObjectProxy(typename ObjT::LibObjPtr libObjPtr) noexcept : _mObj {libObjPtr}
    {
    }

    const ObjT *operator->() const noexcept
    {
        return &_mObj;
    }

private:
    ObjT _mObj;
};

} /* namespace bt2 */

#endif /* BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP */
Commit	Line	Data
3b1517b9 PP	1	/*
	2	* Copyright (c) 2023 Philippe Proulx <pproulx@efficios.com>
	3	*
	4	* SPDX-License-Identifier: MIT
	5	*/
	6
	7	#ifndef BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP
	8	#define BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP
	9
	10	namespace bt2 {
	11
	12	/*
	13	* A proxy containing a valid borrowed object instance of `ObjT` to make
	14	* Something::operator->() work when only a libbabeltrace2 object
	15	* pointer is available.
	16	*/
	17	template <typename ObjT>
	18	class BorrowedObjectProxy final
	19	{
	20	public:
d246c457	21	explicit BorrowedObjectProxy(typename ObjT::LibObjPtr libObjPtr) noexcept : _mObj {libObjPtr}
3b1517b9 PP	22	{
	23	}
	24
	25	const ObjT *operator->() const noexcept
	26	{
	27	return &_mObj;
	28	}
	29
	30	private:
	31	ObjT _mObj;
	32	};
	33
	34	} /* namespace bt2 */
	35
	36	#endif /* BABELTRACE_CPP_COMMON_BT2_BORROWED_OBJECT_PROXY_HPP */