Re: A ping for __tonumber

[Thomas Jericke <tjericke@...>]

On 07/26/2013 03:40 PM, Philipp Janda wrote:
> Am 26.07.2013 17:17 schröbte Andrew Starks:
> > Within my own Lua code, I often want to turn an object into a plain
> > number. The meta-methods can effectively do most of what I want, but
> > not when I'm dealing with relational operators when one side of is an
> > actual number.
> >
> > Finally, __tonumber just feels... missing. I even had to triple check
> > that it wasn't in 5.2, lest I embarrass myself. :)
>
> But Lua 5.2 *does* have support for mixed arguments in relational 
> operations :-p
Unless you want to test for equality. And at some point down the road 
you will have to test for it. I would actually never define the 
comparison metamethods for mixed types because once you test for 
equality it will always be confusing.

--
Thomas