Re: Comparing numerical objects for equality (patch)

[Andrew <ajc@...>]

sorry, too quick hitting send there!

No that doesn't work if a is a number of course.

What we're trying to do is write code that doesn't need to know whether
the operands are Lua numbers or some kind of number-like object. That's
why we want to use the '==' operator and have Lua figure out whether it
can do the operation itself or call a metamethod to do it.

-a

On 10/06/2022 01:20, Andrew wrote:
> On 10/06/2022 01:08, Luiz Henrique de Figueiredo wrote:
> > > if a == 1 then          -- metamethod __eq
> >
> > You can write this instead:
> >      if a:__eq(1) then
>
> does that work if a is a Lua number?
>
> > Not as pretty but not terrible either.
> > This assumes that the methods in your library work with objects and
> > numbers, promoting numbers to objects as needed.