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Re: [Json] Minus Zero

Anders Rundgren <anders.rundgren.net@gmail.com> Tue, 21 June 2016 17:03 UTC

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To: John Cowan <cowan@mercury.ccil.org>
References: <2a7f88b9-f719-dfd8-08a9-1777833e53d8@gmail.com> <e94f3bd0-1635-b2e1-c5da-9ae350ae652d@gmail.com> <57684982.2010705@tzi.org> <8e5dc4b2-a897-30e7-6e37-921c463275cd@gmail.com> <CADEL5zv-0ZRdcXKp1R=EBHqcJquOR7CYR=EW75xmtFpXG5OLOg@mail.gmail.com> <20160621154243.GG13605@mercury.ccil.org>
From: Anders Rundgren <anders.rundgren.net@gmail.com>
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Date: Tue, 21 Jun 2016 19:02:56 +0200
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Cc: Carsten Bormann <cabo@tzi.org>, Christian Zangl <coralllama@gmail.com>, JSON WG <json@ietf.org>
Subject: Re: [Json] Minus Zero
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On 2016-06-21 17:42, John Cowan wrote:
> Anders Rundgren scripsit:
>
>> Implementstions do NOT agree on floating point serialization.  Neither text
>> (like E or e), leading zeroes or even values are to be counted on.
>
> Disagreement on the lexical details of production does not mean disagreement
> on interpretation, which is what is at stake here.  Nobody supposes that
> 10, 1e1, 1E1, 10.0, 10.00 mean different things.  The same is not true for
> 0.0 and -0.0.
>

Apparently the ES6 folks consider IEEE 0.0 and -0.0 equal during JSON serialization.
This is probably a reasonable conclusion since non-normalized numbers are treated differently.
It is also better aligned with integers.

In order to make anything else JSON would need separate integer and floating point types.

Anders

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