Re: [ANN] luaprompt 0.2

[Justin Cormack <justin@...>]

On Sun, Jul 1, 2012 at 7:23 PM, Dimitris Papavasiliou <dpapavas@gmail.com> wrote:

I'm not familiar with LuaJIT.  From what I understand these aren't
userdata values.  Are cdata new kinds of values introduced by LuaJIT?

Yes, much like userdata but created via the ffi interface rather than the C interface. 

The absolute simplest example is

>  ffi=require"ffi"

>  t=ffi.metatype("struct{int a;}",{__tostring=function(x) return "custom tostring " .. x.a end})

>  a=t(2)

>  a

>  print(a)

custom tostring 2

>  type(a)

"cdata"