Re: proposal : keyword default

From	Edward Diener <eldiener@tropicsoft.invalid>
Newsgroups	comp.std.c++
Subject	Re: proposal : keyword default
Date	2013-10-05 19:19 -0700
Organization	A noiseless patient Spider
Message-ID	<l2nojk$10h$1@dont-email.me> (permalink)
References	<3c07b20c$1@master.soko.hr> <f7909d88-eef3-4c68-864f-09912789dc89@googlegroups.com> <FOOdncbkK9Y5uNPPnZ2dnUVZ_sKdnZ2d@earthlink.com>

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On 10/4/2013 2:58 PM, Paul D. DeRocco wrote:
>>
>> On 10/3/2013 3:25 PM, alexander.stoyan@googlemail.com wrote:
>>
>> Instead it would be elegant to just use:
>>
>> thread_t thr_id = 0;
>> make_thread(thread_function, default, default, default, &thr_id);
>
>
> I didn't see the earlier parts of this thread, so this may have come up.
> Has the idea of leaving out the arguments entirely come up? E.g.,
>
> make_thread(thread-function, , , , &thr_id);

I have always liked this idea. I see no reason for passing a keyword
such as 'default'. Nor do I see a downside for leaving out a value
entirely when you want the compiler to use the default value in the
function declaration. I do not believe there is any other use for such
a function invocation, so there is no chance of breaking existing
code.

Not passing anything should simply say "Pass the default value". If
there is no default value for that positional parameter and the
invoker does not pass anything it is a compiler error. Simple,
straightforward, and cannot be confused with anything else when
invoking a function.

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Re: proposal : keyword default alexander.stoyan@googlemail.com - 2013-10-03 13:25 -0600
  Re: proposal : keyword default Daniel Krügler <daniel.kruegler@googlemail.com> - 2013-10-04 11:19 -0700
  Re: proposal : keyword default "Paul D. DeRocco" <pderocco@ix.netcom.com> - 2013-10-04 11:58 -0700
    Re: proposal : keyword default Bo Persson <bop@gmb.dk> - 2013-10-05 19:19 -0700
      Re: proposal : keyword default Edward Diener <eldiener@tropicsoft.invalid> - 2013-10-07 01:50 -0600
    Re: proposal : keyword default Edward Diener <eldiener@tropicsoft.invalid> - 2013-10-05 19:19 -0700
      Re: proposal : keyword default Francis Glassborow <francis.glassborow@btinternet.com> - 2013-10-07 01:50 -0600
        Re: proposal : keyword default Edward Diener <eldiener@tropicsoft.invalid> - 2013-10-07 15:05 -0600
          Re: proposal : keyword default James Kuyper <jameskuyper@verizon.net> - 2013-10-08 12:36 -0700
          Re: proposal : keyword default Helmut Zeisel <zei2011@liwest.at> - 2013-10-12 03:47 -0600
            Re: proposal : keyword default Edward Diener <eldiener@tropicsoft.invalid> - 2013-10-12 11:36 -0600
              Re: proposal : keyword default ootiib@hot.ee - 2013-10-12 23:10 -0600
              Re: proposal : keyword default John Harris <niam@jghnorth.org.uk.invalid> - 2013-10-13 11:33 -0600
                Re: proposal : keyword default Edward Diener <eldiener@tropicsoft.invalid> - 2013-10-16 10:34 -0600
              Re: proposal : keyword default Helmut Zeisel <zei2011@liwest.at> - 2013-10-14 20:37 -0700
  Re: proposal : keyword default Alexander Terekhov <terekhov@web.de> - 2013-10-18 01:20 -0600

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