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Re: What if pre-processor was moved to parser?

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: What if pre-processor was moved to parser?
Date 2017-02-15 15:16 +0000
Organization A noiseless patient Spider
Message-ID <87lgt7qyan.fsf@bsb.me.uk> (permalink)
References <11c906d6-9be0-44df-82b4-157fdba3b91c@googlegroups.com> <dd3ed896-e224-4263-ab5c-ea782b3c84f5@googlegroups.com> <o81egc$b6q$1@dont-email.me> <436a6e24-df32-45d9-b24e-c1e135c32c24@googlegroups.com>

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Thiago Adams <thiago.adams@gmail.com> writes:

> On Wednesday, February 15, 2017 at 9:38:51 AM UTC-2, Bart wrote:
> ...
>> I think, if there was a pressing need for something, then I would 
>> introduce a new language feature for it without resorting to macros as 
>> seems to be the C solution for everything. And programs full of macros, 
>> as well as being less readable and causing problems for refactoring, are 
>> slower to compile.
>> 
>> Since it seems you are thinking of creating a C replacement, you can 
>> start by investigating existing uses of macros, which may have to go 
>> further then MISRA, and seeing how they would look as proper features 
>> directly in the language.
>
>
> Some samples to make the idea clear:
> I will allow empty define, constant or constant-expression with ()
>
> C' Grammar:
>
> define-declaration:
>  #define identifier
>  #define identifier constant
>  #define identifier ( constant-expression )

See below...

> Here #define is no more preprocessor. 
> The constant-expression can be evaluated and the value
> is used as a constant. (Like enum constant)
>
> Sample C' language with no preprocessor:
>
> #define DEBUG
>
> //This will not compile (missing ( ) )
> //#define A 1 + 2
>
> //This will compile
> #define A (1 + 2)

If you make this a part of the language, then there is no need to insist
on parentheses.

But I would urge the use of something other the #define (#substitute?).
In fact, there would no longer be any need the use the clumsy
line-oriented syntax of the preprocessor.

<snip>
-- 
Ben.

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Thread

What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-14 15:37 -0800
  Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-15 00:05 -0800
    Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-15 00:57 -0800
      Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-15 07:21 -0800
        Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-15 07:24 -0800
          Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-15 08:10 -0800
  Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 03:05 -0800
    Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 11:38 +0000
      Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 04:28 -0800
        Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 13:22 +0000
          Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 05:47 -0800
        Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 10:06 -0800
      Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 05:24 -0800
        Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 13:57 +0000
          Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-19 10:27 -0800
        Re: What if pre-processor was moved to parser? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-15 15:16 +0000
          Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 08:14 -0800
            Re: What if pre-processor was moved to parser? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-15 18:01 +0000
              Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 18:25 +0000
                Re: What if pre-processor was moved to parser? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-02-15 19:14 +0000
              Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-15 10:25 -0800
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 18:45 +0000
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-15 20:03 +0100
        Re: What if pre-processor was moved to parser? jameskuyper@verizon.net - 2017-02-15 10:12 -0800
          Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-15 10:51 -0800
          Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 12:14 -0800
            Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-15 20:25 +0000
              Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 12:50 -0800
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-16 11:50 +0000
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-16 04:44 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-16 05:28 -0800
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-16 14:32 +0000
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-16 09:13 -0800
                Re: What if pre-processor was moved to parser? Keith Thompson <kst-u@mib.org> - 2017-02-16 10:38 -0800
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-16 11:55 -0800
                Re: What if pre-processor was moved to parser? Keith Thompson <kst-u@mib.org> - 2017-02-16 12:24 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-16 21:32 +0100
                Re: What if pre-processor was moved to parser? Keith Thompson <kst-u@mib.org> - 2017-02-16 12:55 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-16 22:41 +0100
                Re: What if pre-processor was moved to parser? Keith Thompson <kst-u@mib.org> - 2017-02-16 14:02 -0800
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-16 15:08 -0800
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-16 13:32 -0800
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-17 21:19 +1300
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-17 12:01 +0100
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-17 09:16 -0800
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-17 18:55 +0100
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 08:07 +1300
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-17 20:12 +0100
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 11:04 +1300
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-17 22:38 +0000
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 11:47 +1300
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-17 14:55 -0800
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 12:11 +1300
                Re: What if pre-processor was moved to parser? "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-02-17 15:26 -0800
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-17 16:15 -0800
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 13:22 +1300
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-17 16:37 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-18 11:57 +0100
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-18 07:13 +0000
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 20:26 +1300
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-18 09:17 +0000
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-18 01:18 +0100
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 13:23 +1300
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-18 01:45 +0100
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 16:18 +1300
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-18 07:19 +0000
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-18 20:30 +1300
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-18 09:18 +0000
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-18 07:15 -0800
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-24 09:24 -0800
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-24 17:51 +0000
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-24 10:08 -0700
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-04-24 18:58 +0100
                Re: What if pre-processor was moved to parser? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2017-04-26 05:03 +0000
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-30 11:21 -0700
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-25 09:15 +1300
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-24 17:29 -0800
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-04-26 06:19 -0700
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-04-26 16:04 +0200
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-04-26 07:08 -0700
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-04-26 16:46 +0200
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-04-26 09:32 -0700
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-04-26 20:19 +0200
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-04-26 11:29 -0700
                Re: What if pre-processor was moved to parser? scott@slp53.sl.home (Scott Lurndal) - 2017-04-26 18:51 +0000
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-04-27 09:32 +1200
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-04-27 11:01 +0200
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-04-27 02:23 -0700
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-04-27 21:31 +1200
                Re: What if pre-processor was moved to parser? Ike Naar <ike@iceland.freeshell.org> - 2017-04-27 16:15 +0000
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-04-27 09:35 -0700
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-04-28 15:12 +0200
                Re: What if pre-processor was moved to parser? Gareth Owen <gwowen@gmail.com> - 2017-04-27 19:13 +0100
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-04-27 11:37 +0200
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-04-27 15:18 +0200
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-18 08:43 +0100
                Re: What if pre-processor was moved to parser? Richard Heathfield <rjh@cpax.org.uk> - 2017-02-18 09:22 +0000
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-18 09:44 -0800
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-18 11:33 +0000
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-18 13:25 +0100
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-18 13:47 +0000
                Re: What if pre-processor was moved to parser? Jean-Marc Bourguet <jm@bourguet.org> - 2017-02-18 15:23 +0100
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-18 14:53 +0000
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-18 16:56 +0000
                Re: What if pre-processor was moved to parser? Robert Wessel <robertwessel2@yahoo.com> - 2017-02-18 22:50 -0600
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-19 09:45 +0100
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-19 13:35 +0100
                Re: What if pre-processor was moved to parser? "James R. Kuyper" <jameskuyper@verizon.net> - 2017-02-18 11:24 -0500
                Re: What if pre-processor was moved to parser? Robert Wessel <robertwessel2@yahoo.com> - 2017-02-18 22:48 -0600
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-18 10:04 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-19 17:12 +0100
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-19 11:11 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-19 21:14 +0100
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-19 21:22 +0100
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-19 12:33 -0800
                Re: What if pre-processor was moved to parser? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2017-02-19 12:31 -0800
                Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-19 13:14 -0800
                Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-19 14:50 -0800
                Re: What if pre-processor was moved to parser? fir <profesor.fir@gmail.com> - 2017-02-19 15:04 -0800
                Re: What if pre-processor was moved to parser? David Brown <david.brown@hesbynett.no> - 2017-02-20 10:13 +0100
                Re: What if pre-processor was moved to parser? Gareth Owen <gwowen@gmail.com> - 2017-02-19 21:09 +0000
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-23 15:32 -0800
                Re: What if pre-processor was moved to parser? Ian Collins <ian-news@hotmail.com> - 2017-02-24 12:44 +1300
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-19 21:04 -0800
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-19 21:14 -0800
                Re: What if pre-processor was moved to parser? Andrey Tarasevich <andreytarasevich@hotmail.com> - 2017-02-16 14:48 -0800
                Re: What if pre-processor was moved to parser? Keith Thompson <kst-u@mib.org> - 2017-02-16 15:46 -0800
                Re: What if pre-processor was moved to parser? Tim Rentsch <txr@alumni.caltech.edu> - 2017-02-23 16:16 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-20 04:18 -0800
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-20 06:47 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-20 09:50 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-21 04:33 -0800
                Re: What if pre-processor was moved to parser? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-02-21 15:41 +0100
                Re: What if pre-processor was moved to parser? supercat@casperkitty.com - 2017-02-21 09:39 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-21 09:59 -0800
                Re: What if pre-processor was moved to parser? TickleMe Elmo <tmelmosfire@gmail.com> - 2017-02-21 10:22 -0800
                Re: What if pre-processor was moved to parser? BartC <bc@freeuk.com> - 2017-02-20 15:49 +0000
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-20 09:43 -0800
            Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 12:31 -0800
              Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-16 03:33 -0800
            Re: What if pre-processor was moved to parser? jameskuyper@verizon.net - 2017-02-15 12:47 -0800
              Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 13:06 -0800
                Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-02-15 13:15 -0800
  Re: What if pre-processor was moved to parser? "Patrick.Schluter" <Patrick.Schluter@free.fr> - 2017-02-18 12:36 +0100
    Re: What if pre-processor was moved to parser? "Patrick.Schluter" <Patrick.Schluter@free.fr> - 2017-02-18 12:41 +0100
  Re: What if pre-processor was moved to parser? John Bode <jfbode1029@gmail.com> - 2017-04-26 09:42 -0700
    Re: What if pre-processor was moved to parser? Thiago Adams <thiago.adams@gmail.com> - 2017-04-26 09:58 -0700

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