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- Subject: Re: FFI metamethods on C struct pointer
- From: Javier Guerra Giraldez <javier@...>
- Date: Sat, 11 Jun 2011 12:17:09 -0500
On Sat, Jun 11, 2011 at 11:48 AM, Mike Pall <mikelu-1106@mike.de> wrote:
> Javier Guerra Giraldez wrote:
>> it never calls my __tostring() metamethod. it seems that it's because
>> the cdata contains a FILE*, and not a FILE.
>
> It works now. Please see my other message.
great! thanks a LOT. trying right now... and it works!
>> but i can't do:
>>
>> ffi.metatype ('FILE *')
>>
>> nor:
>>
>> local file_tp = ffi.typeof ('FILE *')
>> ffi.metatype (file_tp, {.....})
>
> Nor should this work. Metatypes are always bound to the underlying
> aggregate and not to any pointer type.
yes, that's what i understood from the docs and what the error
messages tell. it seems too much magic to my C-oriented side of
brain, but the contrary would make the Lua code really ugly. making
LuaJIT (and FFI) to magically associate pointers is great
--
Javier