helper.h

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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);
 
    template <typename T>
    static T readParam(lua_State *L, int index);
 
    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);
    }
};