Re: [LuaJIT FFI] Issues with cdata/ctype

[Justin Cormack <justin@...>]

On 29 May 2011, at 16:58, Duncan Cross <duncan.cross@gmail.com> wrote:

> On Sun, May 29, 2011 at 4:54 PM, Justin Cormack
> <justin@specialbusservice.com> wrote:
>>>> Why cant you just add a __tobuffer metamethod to all the types?
>>> 
>>> getmetatable(cdata) always seems to return 'ffi', currently.
>>> 
>> 
>> You have to use ffi.metatype() to set a metatable. eg
>> fd_t = ffi.metatype("struct {int fd;}", {__index = {close = close}, __gc =
>> close})
>> This can only be done on creation, but works nicely.
> 
> Yep, I'm using ffi.metatype - but the metatable you set is still not
> retrieved by getmetatable(), it still just returns 'ffi' for me. (Is
> it different for you? Maybe this is a bug?)
> 
> -Duncan
> 

Why try to get the metatable, just pcall the method to see if it is there. I think it is a feature not a bug in this case.