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- Subject: International support in Lua
- From: Nick Gammon <nick@...>
- Date: Thu, 14 Jun 2007 09:50:32 +1000
I have scanned the list and Googled for an answer without heaps of
success so please bear with me if this has been asked before recently.
I am in the process of adding Internationalization (i18n) to my
application, and been investigating gettext and other methods of
Having had modest success with my main program, I am now turning my
attention to Lua as my app uses it for scripting.
As far as I can see, there is no provision for making Lua more
gettext-friendly. Thus, I make the following suggestion:
For error messages (in particular) which are currently in English, it
would be helpful if the developers could surround them by a simple
macro, which could aid production of a gettext translation template.
For example, instead of:
luaL_error(L, "invalid format (repeated flags)");
... you would have:
luaL_error(L, _TR("invalid format (repeated flags)"));
The exact name of the macro isn't important. In the include file you
can then declare:
#define _TR(string) (string)
Thus effectively, from Lua's point of view, this becomes a no-op,
which does not alter or slow down execution in any way.
However then you can do a "pass" over the source using xgettext, and
extract out all the error messages into a translation template file.
This could be used to automatically translate the errors from one
language to another. For example, an implementor might change _TR to
actually do the translation when required.
There are some issues, such as formatted error strings, and the
fairly extensive use of the LUA_QL macro, however these could be
Are there any major objections? Do all Lua developers use English? Or
would it be helpful?
- Nick Gammon