Re: [Proposal] Overload | for booleans

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• Subject: Re: [Proposal] Overload | for booleans
• From: "Soni L." <fakedme@...>
• Date: 2015年7月29日 15:09:19 -0300

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On 29/07/15 03:05 PM, Tim Hill wrote:

On Jul 29, 2015, at 7:53 AM, Soni L. <fakedme@gmail.com> wrote:
On 29/07/15 11:18 AM, Dirk Laurie wrote:

2015年07月29日 15:56 GMT+02:00 Soni L. <fakedme@gmail.com>:

Can we get true | false to be a thing?

debug.setmetatable(true,{
 __bor = function(x,y)
 assert (type(x)=='boolean' and type(y)=='boolean')
 return x or y
 end;
 __band = function(x,y)
 assert (type(x)=='boolean' and type(y)=='boolean')
 return x and y
 end;
})
I like that! But why do you call it a proposal?

It would be non-short-circuiting and/or.
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function andx(c1, c2) return c1 and c2 end
function orx(c1, c2) return c1 or c2 end
...
if andx(a < 100, b > 300) then … end
etc. And of course easy to extend andx() and orx() to take varargs for as many expressions as you want.
—Tim

Still does branching (twice, even, because of the function call). The only difference is that now you evaluate both sides.

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• Follow-Ups:
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• References:
  • [Proposal] Overload | for booleans, Soni L.
  • Re: [Proposal] Overload | for booleans, Dirk Laurie
  • Re: [Proposal] Overload | for booleans, Soni L.
  • Re: [Proposal] Overload | for booleans, Tim Hill

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