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/*
 * Copyright (c) 2013 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#pragma once

#include <lua.hpp>
#include <boost/optional.hpp>
#include <string>
#include <vector>

#if LUA_VERSION_NUM < 502
#define lua_pushglobaltable(L) lua_pushvalue(L, LUA_GLOBALSINDEX)
#endif

namespace Swift {
	namespace Lua {
		/**
		 * Can be used as __tostring metamethod on a table.
		 */
		int convertTableToString(lua_State* L);

		void registerTableToString(lua_State* L, int index);
		void registerTableEquals(lua_State* L, int index);
		void registerGetByTypeIndex(lua_State* L, int index);
		void registerHelp(lua_State* L, int index, 
				const std::string& description, const std::string& parameters, const std::string& options);
		void registerClassHelp(lua_State* L, const std::string& name, const std::string& description);
		void registerExtraHelp(lua_State* L, int index, const std::string& name);

		inline int absoluteOffset(lua_State* L, int index) {
			return index > 0 ? index : lua_gettop(L) + index + 1;
		}

		boost::optional<std::string> getStringField(lua_State* L, int index, const std::string&);
		boost::optional<bool> getBooleanField(lua_State* L, int index, const std::string&);
		boost::optional<int> getIntField(lua_State* L, int index, const std::string&);

		void pushStringArray(lua_State* L, const std::vector<std::string>& strings);
	}
}