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Re: ECMAScript and classes

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Christoph M. Becker wrote:

> John Harris wrote:
>> To sum up, C++, Java, and suchlike fully *support* classes whereas
>> ECMAScript allows programmers to *implement* classes but provides
>> less than full *support* for them.
> 
> It seems to be important to distinguish between the Ecma-262 editions.
> Your notes seem to take into account only Ecma-262 Edition 3. Edition
> 5.1 (or maybe 5 already) introduced Object.seal()[1]

5 did, see ES 5.1 Annex F (which does not mention a change there).

> which can be applied to the prototype object. Ecma-262 Edition 6 might
> introduce "maximally minimal" classes[2] and private name objects[3] which
> would provide better support for classes in the classical sense.

Also, implementations of the abandoned ECMAScript Edition 4 Working Draft do 
have native and support user-defined classes.  You can see that, for 
example, with Microsoft JScript .NET in ASP .NET, and ActionScript 2.0+ in 
Macromedia/Adobe Flash.  The Netscape implementation of that draft was 
versioned “JavaScript 2.0” (never released), and there was a reference  
implementation codenamed “Epimetheus”.

That Edition 6 might (I daresay, probably will) re-introduce classes in some 
way appears to be the result of the Harmony agreement:

<https://mail.mozilla.org/pipermail/es-discuss/2008-August/006837.html>

-- 
PointedEars
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Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix>
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ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-21 10:49 +0100
  Re: ECMAScript and classes Gregor Kofler <usenet@gregorkofler.com> - 2014-10-21 12:25 +0200
    Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-23 11:34 +0100
  Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-10-21 13:27 +0200
    Re: ECMAScript and classes Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-10-21 19:27 +0200
      Re: ECMAScript and classes Stefan Weiss <krewecherl@gmail.com> - 2014-10-22 00:15 +0200
      Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-10-23 14:45 +0200
      Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-23 15:12 +0100
        Re: ECMAScript and classes Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-11-01 20:59 +0100
          Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-11-03 15:56 +0000
            Re: ECMAScript and classes Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-11-08 19:11 +0100
              Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-11-10 14:48 +0000
                Re: ECMAScript and classes Tim Streater <timstreater@greenbee.net> - 2014-11-10 15:54 +0000
                Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-11-10 18:02 +0100
                Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-11-11 11:08 +0000
                Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-11-13 17:48 +0100
                Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-11-13 20:32 +0000
                Re: ECMAScript and classes Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-11-10 23:03 +0100
                Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-11-11 17:03 +0000
    Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-23 14:58 +0100
      Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-10-23 18:37 +0200
        Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-24 11:30 +0100
          Re: ECMAScript and classes "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-10-24 19:45 +0200
            Re: ECMAScript and classes John Harris <niam@jghnorth.org.uk.invalid> - 2014-10-26 10:43 +0000

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