godot/modules/mono/utils/macros.h

73 lines
3.2 KiB
C++

/*************************************************************************/
/* macros.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef UTIL_MACROS_H
#define UTIL_MACROS_H
#define _GD_VARNAME_CONCAT_B_(m_ignore, m_name) m_name
#define _GD_VARNAME_CONCAT_A_(m_a, m_b, m_c) _GD_VARNAME_CONCAT_B_(hello there, m_a##m_b##m_c)
#define _GD_VARNAME_CONCAT_(m_a, m_b, m_c) _GD_VARNAME_CONCAT_A_(m_a, m_b, m_c)
#define GD_UNIQUE_NAME(m_name) _GD_VARNAME_CONCAT_(m_name, _, __COUNTER__)
// unreachable
#if defined(_MSC_VER)
#define GD_UNREACHABLE() __assume(0)
#elif defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 405
#define GD_UNREACHABLE() __builtin_unreachable()
#else
#define GD_UNREACHABLE() \
CRASH_NOW(); \
do { \
} while (true)
#endif
namespace gdmono {
template <typename F>
struct ScopeExit {
ScopeExit(F p_exit_func) :
exit_func(p_exit_func) {}
~ScopeExit() { exit_func(); }
F exit_func;
};
class ScopeExitAux {
public:
template <typename F>
ScopeExit<F> operator+(F p_exit_func) { return ScopeExit<F>(p_exit_func); }
};
} // namespace gdmono
#define SCOPE_EXIT \
auto GD_UNIQUE_NAME(gd_scope_exit) = gdmono::ScopeExitAux() + [=]() -> void
#endif // UTIL_MACROS_H