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Re: Concrete classes considered harmful

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From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c++
Subject Re: Concrete classes considered harmful
Date Sat, 11 Jul 2015 15:09:13 +1200
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Mr Flibble wrote:
> Dependencies on concrete classes are considered harmful and should be
> replaced with dependencies on abstractions.

By whom?

> A class should not new its
> member objects for example but rather should use a factory passed into
> its constructor.

Why?

-- 
Ian Collins

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Thread

Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-11 04:04 +0100
  Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-11 15:09 +1200
    Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-11 17:49 +0100
      Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-11 18:10 +0100
        Re: Concrete classes considered harmful Martin Shobe <martin.shobe@yahoo.com> - 2015-07-11 13:33 -0500
      Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-12 09:17 +1200
        Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 01:51 +0100
          Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-12 13:20 +1200
            Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 02:32 +0100
              Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-12 15:48 +1200
                Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 13:46 +0100
              Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-12 16:14 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 17:46 +0000
                Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-14 08:52 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 22:01 +0000
            Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 17:28 +0000
              Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-14 08:47 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 22:02 +0000
                Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-14 10:35 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-14 04:52 +0000
                Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-14 19:31 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-15 16:57 +0000
                Re: Concrete classes considered harmful Ian Collins <ian-news@hotmail.com> - 2015-07-16 09:49 +1200
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-16 15:53 +0000
                Re: Concrete classes considered harmful Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-08 13:20 +0000
                Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-10-12 20:48 +0000
      Re: Concrete classes considered harmful Juha Nieminen <nospam@thanks.invalid> - 2015-07-12 11:32 +0000
        Re: Concrete classes considered harmful Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2015-07-12 13:46 +0100
          Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 13:54 +0100
            Re: Concrete classes considered harmful Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2015-07-12 14:21 +0100
              Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 14:40 +0100
                Re: Concrete classes considered harmful Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2015-07-12 14:59 +0100
    Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 17:08 +0000
      Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-13 19:59 +0100
      Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-13 20:06 +0100
  Re: Concrete classes considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2015-07-11 05:11 +0200
    Re: Concrete classes considered harmful legalize+jeeves@mail.xmission.com (Richard) - 2015-07-13 17:10 +0000
  Re: Concrete classes considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2015-07-11 06:07 +0200
    Re: Concrete classes considered harmful woodbrian77@gmail.com - 2015-07-11 14:12 -0700
  Re: Concrete classes considered harmful Paavo Helde <myfirstname@osa.pri.ee> - 2015-07-11 02:06 -0500
    Re: Concrete classes considered harmful JiiPee <no@notvalid.com> - 2015-07-11 08:28 +0100
    Re: Concrete classes considered harmful Reinhardt Behm <rbehm@hushmail.com> - 2015-07-11 15:48 +0800
  Re: Concrete classes considered harmful Chris Vine <chris@cvine--nospam--.freeserve.co.uk> - 2015-07-12 00:16 +0100
    Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 01:52 +0100
  Re: Concrete classes considered harmful David Harmon <source@netcom.com> - 2015-07-12 06:58 -0700
    Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 15:45 +0100
  Re: Concrete classes considered harmful Mr Flibble <flibble@i42.co.uk> - 2015-07-12 16:30 +0100
    Re: Concrete classes considered harmful woodbrian77@gmail.com - 2015-07-12 11:23 -0700
      Re: Concrete classes considered harmful "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2015-07-12 21:37 +0200
        Re: Concrete classes considered harmful woodbrian77@gmail.com - 2015-07-12 14:34 -0700
      Re: Concrete classes considered harmful Luca Risolia <luca.risolia@linux-projects.org> - 2015-07-13 00:38 +0200

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