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/*
Minetest
Copyright (C) 2018 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
extern "C" {
#include <lua.h>
#include <lauxlib.h>
}
class LuaHelper
{
protected:
static bool isNaN(lua_State *L, int idx);
/**
* Read a value using a template type T from Lua State L and index
*
*
* @tparam T type to read from Lua
* @param L Lua state
* @param index Lua Index to read
* @return read value from Lua
*/
template <typename T>
static T readParam(lua_State *L, int index);
/**
* Read a value using a template type T from Lua State L and index
*
* @tparam T type to read from Lua
* @param L Lua state
* @param index Lua Index to read
* @param default_value default value to apply if nil
* @return read value from Lua or default value if nil
*/
template <typename T>
static inline T readParam(lua_State *L, int index, const T &default_value)
{
return lua_isnoneornil(L, index) ? default_value : readParam<T>(L, index);
}
};