Re: Infinity as index

["Thiago L." <fakedme@...>]

On 24/04/2014 12:20, Elias Barrionovo wrote:
> On Wed, Apr 23, 2014 at 2:56 PM, Lukas Prokop <admin@lukas-prokop.at> wrote:
> > 1. Shall inf, -inf and -nan be allowed as indices for strings?
>
> Lua strings are finite sequences of characters (bytes), so indexing
> them with infinity, IMHO, should return nil, empty string (like
> indexing a nonexistant position) or blow up an error. Indexing with
> nan makes no sense at all, so error or nil + msg.
I think it should expand +inf to #str and -inf to 1 (= passing -#str to 
the function)...
> In any case, I do think the current behaviour, though following
> perfectly sensible GIGO guidelines, may lead to subtle bugs and
> therefore should be changed at the library level.