Re: Rounding a number to integer

Subject: Re: Rounding a number to integer
From: Egor Skriptunoff &lt;egor.skriptunoff@ ... &gt;
Date: Sat, 30 Jul 2016 11:43:31 +0300

On Sat, Jul 30, 2016 at 11:00 AM, Duane Leslie <parakleta@darkreality.org> wrote:

I gave the simplest solution that gives an integer result where possible and errors out otherwise.

Unfortunately, "simplest solution" you gave is not a solution at all.
It gives wrong results even for integers stored as float:

> x=13510798882111490.0
> x|0
13510798882111490
> (x + 0x1p+52 - 0x1p+52)|0
13510798882111488

you have to filter the values, specifically for NaN and any values larger than 0x1p+52 or less than -0x1p+52 (including +/-Inf) I would return verbatim.

Yes, this filter MUST be applied.

Anyway, your idea about x+2^52-2^52 is great!