helper.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2018 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
 
#pragma once
 
#include <string_view>
 
extern "C" {
#include <lua.h>
}
 
class LuaHelper
{
protected:
        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);
        }
};
 
// (only declared for documentation purposes:)
 
template <>
std::string_view LuaHelper::readParam(lua_State *L, int index);