#ifndef OSM2PGSQL_FLEX_LUA_WRAPPER_HPP

#define OSM2PGSQL_FLEX_LUA_WRAPPER_HPP

/**

* SPDX-License-Identifier: GPL-2.0-or-later

*

* This file is part of osm2pgsql (https://osm2pgsql.org/).

*

* Copyright (C) 2006-2026 by the osm2pgsql developer community.

* For a full list of authors see the git log.

*/

#include "output-flex.hpp"

#include <cassert>

#include <exception>

// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)

#define TRAMPOLINE_WRAPPED_OBJECT(obj_name, func_name) \

int lua_trampoline_##obj_name##_##func_name(lua_State *lua_state) \

{ \

try { \

auto *flex = \

static_cast<output_flex_t *>(luaX_get_context(lua_state)); \

auto &obj = flex->get_##obj_name##_from_param(); \

return lua_wrapper_##obj_name##_t{lua_state, &obj}.func_name(); \

} catch (std::exception const &e) { \

return luaL_error(lua_state, "Error in '" #func_name "': %s\n", \

e.what()); \

} catch (...) { \

return luaL_error(lua_state, \

"Unknown error in '" #func_name "'.\n"); \

} \

}

struct lua_State;

/**

* Helper class for wrapping C++ classes in Lua "classes".

*/

template <typename WRAPPED>

class lua_wrapper_base_t

{

public:

lua_wrapper_base_t(lua_State *lua_state, WRAPPED *wrapped)

: m_lua_state(lua_state), m_self(wrapped)

{

assert(lua_state);

assert(wrapped);

}

protected:

lua_State *lua_state() const noexcept { return m_lua_state; }

WRAPPED const &self() const noexcept { return *m_self; }

WRAPPED &self() noexcept { return *m_self; }

private:

lua_State *m_lua_state;

WRAPPED *m_self;

}; // class lua_wrapper_base_t

#endif // OSM2PGSQL_FLEX_LUA_WRAPPER_HPP