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Re: 100 Things

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"Ian Collins" <ian-news@hotmail.com> wrote in message
news:bsegt5Fd2otU7@mid.individual.net...
> BartC wrote:

>> You don't avoid having the range of different types (you need many of
>> those
>> anyway have a flexible set of types for storing data). But there are
>> elegant
>> ways of doing it without  having sprawling lists of macros and typedefs.
>>
>> For example, if T is any primitive type, then T:n could define a version
>> which is n bits wide.
>
> So you substitute an underscore for a colon?

You mean when int32_t, for example, is written as int:32?

The "_t" could have been eliminated anyway, just have int32 as the type.
(int32 becomes a reserved word, what's the big deal?)

But the little thing with the colon thing actually eliminates dozens of
typedefs from the official headers. And the thing with the 'min and 'max
attributes eliminates dozens more. If you have:

unsigned long long int A;

then you need ULLONG_MAX for the highest value of A. But if the type of A
changes, you then have to search for and update all these ULLONG_MAXs. Or
you could just write A'max.

It is actually a big deal having these things properly supported by the
language and not crudely bolted on.

> What about the least and fast types?  The former don't appear very often,
> but the latter are very useful.

I don't really know what they are for. However, the T:n syntax (which is
only a suggestion after all), does give you the flexibility to specify /any/
width, not just those the C implementers have deigned to list in the include
file. int:36 for example.

>>> I agree there's a better way of (but not within the limits of C) to
>>> specify the limits, but they require some form of generics (such as C++
>>> std::numeric_limits).
>>
>> If T is a numeric type, then T'min and T'max could give you the lower and
>> upper limits (as could T'bounds, giving a range type). And you can write
>> X'min etc when you have an expression.
>>
>> You don't need exotic things such as generics. (I know the point of C++
>> is
>> apparently as a tool to build your own language, but when some feature is
>> a
>> morning's work on a compiler, then that's a far simpler route.)
>
> Generics save you from having to extend the language.

By having every user extend his own version, and in a different style to
everyone else? Because /someone/ has to add those 'min and 'max features!
BTW, if someone did want to do that, how exactly do they determine the
minimum and maximum values of a type?

Basic stuff like this should really be built-in. (I know language-building
features are intriguing, but my experience is that just implementing it
directly is a lot less work.)

-- 
Bartc 

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C: 100 Things "BartC" <bc@freeuk.com> - 2014-04-29 17:57 +0100
  Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-04-30 07:40 +0100
    Re: 100 Things "BartC" <bc@freeuk.com> - 2014-04-30 12:16 +0100
      Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-04-30 13:54 +0100
        Re: 100 Things "BartC" <bc@freeuk.com> - 2014-04-30 14:39 +0100
          Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-04-30 20:18 +0100
            Re: 100 Things "BartC" <bc@freeuk.com> - 2014-04-30 22:40 +0100
              Re: 100 Things Kaz Kylheku <kaz@kylheku.com> - 2014-04-30 22:09 +0000
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-04-30 23:36 +0100
                Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-01 11:03 +1200
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 09:47 +0100
              Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-05-01 00:35 +0100
                Re: 100 Things Andy Walker <news@cuboid.co.uk> - 2014-05-01 11:03 +0100
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 20:16 +0100
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 12:44 +0100
                Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-05-02 11:11 +0100
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-02 13:32 +0100
                Re: 100 Things "James Harris" <james.harris.1@gmail.com> - 2014-05-02 16:42 +0100
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-02 17:54 +0100
          Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-01 11:01 +1200
      Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-04-30 21:13 -0400
        Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 09:26 +0100
          Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-05-01 16:08 -0400
      Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-01 13:42 +1200
        Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 09:35 +0100
          Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-01 21:02 +1200
            Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 10:40 +0100
              Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-01 22:06 +1200
          Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-01 11:08 +0200
            Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 11:02 +0100
              Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-01 13:57 +0200
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 15:12 +0100
                Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-01 17:18 +0200
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 17:04 +0100
                Re: 100 Things Kaz Kylheku <kaz@kylheku.com> - 2014-05-01 18:30 +0000
                Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-05-01 16:08 -0400
                Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-02 08:30 +1200
                Re: 100 Things George Neuner <gneuner2@comcast.net> - 2014-05-03 01:29 -0400
                Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-05-03 02:37 -0400
                Re: 100 Things George Neuner <gneuner2@comcast.net> - 2014-05-03 15:39 -0400
                Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-05-03 17:30 -0400
                Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-04 20:05 +1200
                Re: 100 Things George Neuner <gneuner2@comcast.net> - 2014-05-04 13:28 -0400
                Re: 100 Things Ian Collins <ian-news@hotmail.com> - 2014-05-05 07:40 +1200
                Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-01 22:00 +0200
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-01 23:24 +0100
                Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-02 08:59 +0200
                Re: 100 Things "BartC" <bc@freeuk.com> - 2014-05-02 09:53 +0100
                Re: 100 Things "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-05-02 11:22 +0200
                Re: 100 Things Kaz Kylheku <kaz@kylheku.com> - 2014-05-01 18:26 +0000
                Re: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-05-01 16:08 -0400
                Re: 100 Things Kaz Kylheku <kaz@kylheku.com> - 2014-05-02 02:49 +0000
  Re: C: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-04-30 22:08 -0400
  Re: C: 100 Things "BartC" <bc@freeuk.com> - 2014-07-25 23:53 +0100
    Re: C: 100 Things "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-07-26 05:38 -0400
      Re: C: 100 Things "BartC" <bc@freeuk.com> - 2014-07-26 13:51 +0100
        Re: C: 100 Things rick.c.hodgin@gmail.com - 2014-10-25 04:48 -0700
  Re: C: 100 Things "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2014-10-25 04:50 -0700

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