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Groups > comp.lang.c++ > #120298

Re: C++ named requirements as concepts

From David Brown <david.brown@hesbynett.no>
Newsgroups comp.lang.c++
Subject Re: C++ named requirements as concepts
Date 2024-09-25 14:58 +0200
Organization A noiseless patient Spider
Message-ID <vd11eb$3mfjo$1@dont-email.me> (permalink)
References (20 earlier) <vd0fau$3jvte$1@dont-email.me> <vd0hbi$3k8si$1@dont-email.me> <20240925131144.00004c38@yahoo.com> <vd0tc7$3m0aj$1@dont-email.me> <20240925151723.00006aa3@yahoo.com>

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On 25/09/2024 14:17, Michael S wrote:
> On Wed, 25 Sep 2024 13:49:26 +0200
> David Brown <david.brown@hesbynett.no> wrote:
> 
>> On 25/09/2024 12:11, Michael S wrote:
>>> On Wed, 25 Sep 2024 08:24:19 -0000 (UTC)
>>> Muttley@dastardlyhq.com wrote:
>>>    
>>>> On Wed, 25 Sep 2024 09:49:49 +0200
>>>> David Brown <david.brown@hesbynett.no> boringly babbled:
>>>>> looks up.  The error message is likely to be complex because the
>>>>> compiler doesn't know where you made the mistake, and tries to
>>>>> list
>>>>
>>>> It knows what line invoked the error so all it needs to do is print
>>>> that.
>>>>   
>>>>> Using concepts, however, means the error is found on the first
>>>>> attempt to use the type "A<T>" - the compiler can give far clearer
>>>>> information. It can say "On line x, you tried to make A<T>, but
>>>>> type T does not fulfil the requirement you gave on line y when you
>>>>> defined class A".
>>>>
>>>> Tbh if you want to massage templating that much then don't use it
>>>> in the first place, just hard code the functions.
>>>>   
>>>>> Competition is a great thing).  And you sometimes want more
>>>>> information, sometimes less.  But concepts give the programmer and
>>>>> the compiler a far better starting point.
>>>>
>>>> This is where compiler command line switches should come into play.
>>>>   
>>>>> They also allow neater and clearer code with constrained auto
>>>>> declarations, letting you specify something between "this /exact/
>>>>> type" and "whatever seems to fit".
>>>>
>>>> Don't use auto in those scenarios then. Its always nicer when
>>>> people put the specific type in the code anyway.
>>>>   
>>>
>>> Below is example of very simple function with very small
>>> template-related bug of sort that people sometimes do in real life.
>>> I tried 3 compilers. Each one produces more than 20 lines of error
>>> messages none of which was enlightening.
>>>
>>> #include <cstdint>
>>> #include <algorithm>
>>>
>>> void my_sort2(uint8_t* buf, int buflen, const uint8_t* trans_tab)
>>> {
>>>     struct {
>>>       const uint8_t* tab;
>>>       bool operator() (uint8_t a, uint8_t b) {
>>>         return tab[a] < tab[b];
>>>       }
>>>     } cmp;
>>>     cmp.tab = trans_tab;
>>>     std::sort(buf, buf+buflen, &cmp);
>>> }
>>>
>>> I don't know if with conceptized <algorithm> error reporting would
>>> work better. But it is worth a try, because current state is not
>>> satisfactory.
>>>
>>>
>>>    
>>
>> This is a rough attempt at using concepts here.  I made an "xsort"
>> template that checks (at compile time, obviously) a requirement and
>> otherwise passes things on to std::sort.  The
>> "ComparisonFunctionObject" concept checks that you can call the
>> object with two values of a given type and get a result that can be
>> converted to a bool.  The requirement for the Compare parameter to
>> xsort is that this concept must be satisfied with the type you get
>> from dereferencing the iterators.
>>
>> The error messages you get are a lot shorter and clearer.  There's
>> still room for improvement, as always, but it is a /big/ step forward.
>>
>> If you think a particular kind of error - such as using a pointer to
>> the comparison function object instead of the object itself - is
>> common, you can add extra checks to make the errors even clearer.
>>
>> <https://godbolt.org/z/jzqeh8enG>
>>
>>
>>
>>
>> #include <concepts>
>> #include <type_traits>
>> #include <cstdint>
>> #include <algorithm>
>>
>>
>> template <class T>
>> concept Not_pointer = !std::is_pointer_v<T>;
>>
>> template<class Compare, class T>
>> concept ComparisonFunctionObject = requires (T a, T b)
>> {
>>       { Compare()(a, b) } -> std::convertible_to<bool>;
>> };
>>
>>
>> template< class RandomIt, class Compare >
>> requires
>> #if 1                   		           // <- Change this
>>       Not_pointer<Compare> &&
>> #endif
>>       ComparisonFunctionObject<Compare,
>> std::remove_pointer_t<RandomIt> > void xsort( RandomIt first,
>> RandomIt last, Compare comp ) { std::sort(first, last, comp);
>> }
>>
>> void my_sort2(uint8_t* buf, int buflen, const uint8_t* trans_tab)
>> {
>>     struct {
>>       const uint8_t* tab;
>>       bool operator() (uint8_t a, uint8_t b) {
>>         return tab[a] < tab[b];
>>       }
>>     } cmp;
>>     cmp.tab = trans_tab;
>>
>>     xsort(buf, buf+buflen, cmp);
>>     xsort(buf, buf+buflen, &cmp);
>> }
>>
>>
>>
>>
> 
> Interesting attempt, but not good enough. It fails in most common
> use case where Compare is function rather than object.
> 
> bool cmp3(uint8_t a, uint8_t b) {
>    return a < b;
> }
> void my_sort3(uint8_t* buf, int buflen, const uint8_t* )
> {
> #if 1
>    xsort(buf, buf+buflen, cmp3);
> #else
>    std::sort(buf, buf+buflen, cmp3);
> #endif
> }
> 
> STL's insistence on [mis]use of static polymorphism in every possible
> and impossible hole strikes again!
> 

With Bonita's correction to the ComparisonFunctionObject concept:

template<class Compare, class T>
concept ComparisonFunctionObject = requires (Compare cmp, T a, T b)
{
     { cmp(a, b) } -> std::convertible_to<bool>;
};


and the removable of the "Not_pointer" check, the concept works as intended.

(The Not_pointer concept could be modified to allow pointers to 
functions and lambdas, but by then its purpose is lost and it should be 
removed.)

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Thread

C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-21 15:43 -0400
  Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-22 08:06 +0000
    Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 10:45 +0200
      Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-22 08:59 +0000
        Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 11:03 +0200
          Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-22 09:08 +0000
            Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 11:51 +0200
              Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-22 15:15 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 17:33 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 07:39 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 10:54 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 09:32 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 11:45 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 13:56 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 16:00 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 14:03 +0000
                Re: C++ named requirements as concepts scott@slp53.sl.home (Scott Lurndal) - 2024-09-23 15:48 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 17:52 +0200
                Re: C++ named requirements as concepts scott@slp53.sl.home (Scott Lurndal) - 2024-09-23 15:47 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 17:53 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 07:20 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 09:33 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 08:11 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 11:17 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 11:46 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 10:52 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 12:54 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 10:59 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 13:05 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 11:07 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 13:21 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 13:51 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 15:56 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 15:43 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 17:48 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 07:19 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 11:30 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 09:49 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 08:24 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 11:32 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 11:15 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 13:30 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 12:43 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 14:50 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:00 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 12:47 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 15:00 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 13:22 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 17:12 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 15:35 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 19:19 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 07:36 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 11:36 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 13:11 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 13:31 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-09-25 13:52 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 14:06 +0300
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:22 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 11:12 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 14:30 +0300
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:34 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 14:38 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 15:01 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 12:40 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 13:23 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 13:33 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 14:38 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 13:45 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:36 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 14:39 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 15:04 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 17:14 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 16:23 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 17:18 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 17:26 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 17:14 +0200
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-09-25 21:24 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 20:37 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 13:49 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 14:03 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:38 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 15:17 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-09-25 15:49 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 14:52 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 12:55 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 15:08 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 13:24 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 15:28 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 13:36 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 15:44 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 14:11 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 16:14 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 15:32 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 17:33 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 15:49 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 17:53 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 07:34 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 10:20 +0200
                Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-26 16:46 +0800
                Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-26 16:51 +0800
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 11:20 +0200
                Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-26 19:17 +0800
                Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-26 19:27 +0800
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 13:32 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-26 12:23 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 11:25 +0200
                Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-26 19:20 +0800
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 10:03 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 13:33 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 14:09 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 16:14 +0200
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-27 02:27 -0700
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-27 11:11 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-27 16:14 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-27 15:25 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-27 18:24 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-28 09:12 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-28 17:33 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-28 15:47 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-29 13:41 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-29 13:48 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-29 14:49 +0300
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-29 11:23 -0700
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.com - 2024-09-30 07:26 +0000
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-09-30 07:40 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-30 12:24 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-09-30 15:47 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-30 17:58 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-30 10:57 +0200
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-30 05:29 -0700
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-30 14:34 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-30 15:21 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-09-30 16:00 +0000
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-09-30 16:09 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-30 19:43 +0300
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 07:31 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-01 11:01 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 10:06 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 09:58 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 12:58 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 16:14 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 19:43 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-02 07:11 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-02 09:34 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 09:57 +0000
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-30 10:18 -0700
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 07:32 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-30 19:51 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 07:36 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 10:00 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-10-01 10:42 +0200
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-01 12:53 +0300
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 10:02 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-01 13:11 +0300
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 16:13 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-01 21:50 +0300
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-01 20:06 -0700
                Re: C++ named requirements as concepts User <noreply@user.com> - 2024-10-02 05:47 +0100
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-04 06:52 -0700
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-04 13:57 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-02 13:02 +0300
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-04 06:57 -0700
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-06 14:19 +0300
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-10-06 14:22 +0200
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-07 09:11 -0700
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-07 22:53 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-08 18:11 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-08 22:48 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-09 00:12 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-09 01:06 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-09 08:25 +0300
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-09 08:28 +0200
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-09 10:26 +0300
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-09 09:31 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-09 13:58 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-09 14:39 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-09 19:59 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-10-09 22:37 +0300
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-10 11:47 +0300
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-11 04:58 -0700
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-10-11 16:03 +0300
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-12 07:41 -0700
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-12 08:18 -0700
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-10-11 03:57 -0700
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-07 19:19 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-02 07:13 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-10-01 13:06 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 10:01 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-10-01 13:08 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 16:15 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 19:44 +0200
                Re: C++ named requirements as concepts Muttley@DastartdlyHQ.org - 2024-10-01 09:56 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-10-01 13:01 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-29 15:00 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-29 14:37 +0300
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-29 15:42 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-29 15:47 +0200
                Re: C++ named requirements as concepts Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-09-28 04:28 -0700
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-28 13:55 +0000
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 15:33 +0000
                Re: C++ named requirements as concepts Michael S <already5chosen@yahoo.com> - 2024-09-25 17:16 +0300
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-09-25 16:22 +0300
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-25 13:34 +0000
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 17:27 +0200
                Re: C++ named requirements as concepts Paavo Helde <eesnimi@osa.pri.ee> - 2024-09-25 22:37 +0300
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 07:38 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 10:21 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 10:03 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 13:29 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-26 14:09 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-26 16:17 +0200
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 15:07 +0200
                Re: C++ named requirements as concepts Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-09-26 18:22 -0700
                Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-25 14:58 +0200
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-25 15:19 +0200
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-24 13:55 -0700
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 10:50 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 12:53 +0200
    Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-22 07:58 -0400
      Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 14:10 +0200
        Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-23 11:08 -0400
          Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 17:21 +0200
      Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-22 15:21 +0000
        Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 17:34 +0200
          Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 07:40 +0000
            Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 10:55 +0200
              Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 09:33 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 11:46 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 13:59 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 16:02 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-23 14:05 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 16:10 +0200
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-23 12:55 -0700
                Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-23 16:24 -0400
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-23 14:43 -0700
                Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-23 18:59 -0400
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-23 16:06 -0700
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-23 16:10 -0700
                Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-24 09:15 -0400
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 07:23 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 09:34 +0200
                Re: C++ named requirements as concepts Muttley@dastardlyhq.com - 2024-09-24 08:14 +0000
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 11:18 +0200
                Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-24 08:59 -0400
                Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 15:02 +0200
                Re: C++ named requirements as concepts "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-09-24 13:37 -0700
    Re: C++ named requirements as concepts Jack <noreply@mandrill.com> - 2024-09-23 00:15 +0000
      Re: C++ named requirements as concepts wij <wyniijj5@gmail.com> - 2024-09-23 08:48 +0800
  Re: C++ named requirements as concepts David Brown <david.brown@hesbynett.no> - 2024-09-22 11:46 +0200
    Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-22 13:35 +0200
  Re: C++ named requirements as concepts Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-09-22 11:43 -0700
    Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-22 17:00 -0400
      Re: C++ named requirements as concepts Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-09-22 14:50 -0700
        Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-23 10:32 -0400
        Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-23 16:55 +0200
          Re: C++ named requirements as concepts Andrey Tarasevich <andreytarasevich@hotmail.com> - 2024-09-23 08:11 -0700
            Re: C++ named requirements as concepts Bonita Montero <Bonita.Montero@gmail.com> - 2024-09-24 08:24 +0200
  Re: C++ named requirements as concepts jseigh <jseigh_es00@xemaps.com> - 2024-09-25 15:23 -0400

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