Re: Different behavior when __index is a table or a function

[Paco Zamora Martínez <pakozm@...>]

Nice! :-)

But I can't do the same in my code, the instance object metamethod __index is forced to be a table (some functions expect that, which will need a "hard" code rewritting)

2014-10-20 19:24 GMT+02:00 Daurnimator <quae@daurnimator.com>:

On 20 October 2014 12:53, Paco Zamora Martínez <pakozm@gmail.com> wrote:

Thinking about the problem, comes to my head the reason for the lack of operator [] in Lua strings. IMO, it is related with the same problem I'm facing here.

It's not hard to change the string metatable to do this,

at least for an accessor; a __newindex doesn't make sense, as strings are immutable.

local stringlib = string

local string_mt = debug.getmetatable("")

string_mt.__index = function(s,k) if type(k) == "number" then return stringlib.sub(s, k,k) else return stringlib[k] end end

print(("asd")[2])

--

Pako ZM :)

http://cafre.dsic.upv.es:8080/~pako/