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Groups > comp.lang.c > #139465

Re: calling argumentless function with argument

From "Pascal J. Bourguignon" <pjb@informatimago.com>
Newsgroups comp.lang.c
Subject Re: calling argumentless function with argument
Date 2019-01-06 13:51 +0100
Organization Informatimago
Message-ID <m2imz2j6dz.fsf@despina.home> (permalink)
References (8 earlier) <m2r2dqljbb.fsf@despina.home> <nBdYD.43265$Fi6.26172@fx12.am4> <87r2dqsdl4.fsf@bsb.me.uk> <4TlYD.88848$Sj4.69467@fx15.am4> <1dcff02b-a821-401e-861d-6984bbf7c5cc@googlegroups.com>

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fir <profesor.fir@gmail.com> writes:

> it was like that
>
> float f = 2.53;
> int i = 3;
>
> char txt[] = "ala has "+i+" cats and "+f+" dogs";
>
> print(txt);
>
>
> would produce text of the content "ala has 3 cats and 2.53 dogs" then print in on screen
>
> the code is fired by operators and fires the underlying ftos and itoa
> action then then assemblies the resulted 5 chips of text into one
> resizable array (located most probably on heap or on stack if that
> code was local to function)
>
> this is considered extension of c (small part of it as i consider rethinking whole algebra of operators not only +) (this algebra i call 'algebra' or 'string algebra')
>
>
> some problem it dont seems quite c style but i would like to reconsider it anyway


If we are considering extensions, instead of using + for concatenation,
I would propose to use the binary operator !.  It's already the
concatenation operator in some other programming languages (since at
least 46 years).  It would be a pure extension to C, so it wouldn't
break any existing program.

 char txt[] = "ala has "!i!" cats and "!f!" dogs";

Now, there's the problem of converting integers and floating point
numbers to strings.  It is a very bad idea to make it implicit.  If only
because there are a lot of possible representations (different bases,
different formating of floating point numbers, etc).

 int i=42;
 float f=3.141592;
 char txt[] = "ala has "!int_to_string(i,width=7,base=10)!" cats and "
             !float_to_string(f,width=7,fraction=2,exponent=0)!" dogs";
 -> txt=="ala has      42 cats and    3.14 dogs"

Of course, that doesn't prevent you to write a library of simplified
default formaters:

 char txt[] = "ala has "!i2s(i)!" cats and "!f2s(f)!" dogs";

But there's nothing to be gained by making them implicit.

-- 
__Pascal J. Bourguignon__
http://www.informatimago.com

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Thread

calling argumentless function with argument jt@toerring.de (Jens Thoms Toerring) - 2019-01-04 16:04 +0000
  Re: calling argumentless function with argument David Brown <david.brown@hesbynett.no> - 2019-01-04 17:34 +0100
    Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-04 17:30 +0000
      Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-04 09:50 -0800
        Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-05 05:58 -0800
          Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-05 07:56 -0800
            Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-05 10:56 -0800
              Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-05 14:55 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 01:29 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 02:20 +0000
                Re: calling argumentless function with argument Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-06 02:51 +0000
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 12:12 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 11:53 +0000
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 12:58 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 11:45 +0000
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 12:58 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 12:24 +0000
                Re: calling argumentless function with argument Keith Thompson <kst-u@mib.org> - 2019-01-06 04:34 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 13:41 +0100
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 04:10 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 13:51 +0100
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 13:56 +0100
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 05:20 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 16:08 +0100
                Re: calling argumentless function with argument Keith Thompson <kst-u@mib.org> - 2019-01-06 15:59 -0800
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 13:42 +0000
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 06:22 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 16:19 +0100
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 07:42 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 08:05 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 08:30 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 17:44 +0100
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 08:54 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-07 08:02 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-07 08:07 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-07 09:16 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-07 09:40 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-07 09:57 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-09 02:23 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 16:17 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 16:56 +0000
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 09:12 -0800
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 12:39 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 18:26 +0100
                Re: calling argumentless function with argument Bart <bc@freeuk.com> - 2019-01-06 18:52 +0000
                Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-06 02:32 -0800
                Re: calling argumentless function with argument Keith Thompson <kst-u@mib.org> - 2019-01-06 04:38 -0800
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 13:42 +0100
                Re: calling argumentless function with argument Robert Wessel <robertwessel2@yahoo.com> - 2019-01-06 10:27 -0600
                Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-06 17:47 +0100
      Re: calling argumentless function with argument David Brown <david.brown@hesbynett.no> - 2019-01-04 19:30 +0100
      Re: calling argumentless function with argument Keith Thompson <kst-u@mib.org> - 2019-01-04 10:55 -0800
      Re: calling argumentless function with argument Robert Wessel <robertwessel2@yahoo.com> - 2019-01-05 00:16 -0600
    Re: calling argumentless function with argument queequeg@trust.no1 (Queequeg) - 2019-01-07 10:43 +0000
      Re: calling argumentless function with argument Robert Wessel <robertwessel2@yahoo.com> - 2019-01-07 16:25 -0600
  Re: calling argumentless function with argument Barry Schwarz <schwarzb@dqel.com> - 2019-01-04 09:54 -0800
  Re: calling argumentless function with argument Thiago Adams <thiago.adams@gmail.com> - 2019-01-04 10:26 -0800
    Re: calling argumentless function with argument Keith Thompson <kst-u@mib.org> - 2019-01-04 12:07 -0800
  Re: calling argumentless function with argument James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-04 15:03 -0500
    Re: calling argumentless function with argument Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-05 00:04 +0000
      Re: calling argumentless function with argument James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-01-05 22:36 -0500
  Re: calling argumentless function with argument jt@toerring.de (Jens Thoms Toerring) - 2019-01-05 13:17 +0000
    Re: calling argumentless function with argument fir <profesor.fir@gmail.com> - 2019-01-05 06:06 -0800
    Re: calling argumentless function with argument David Brown <david.brown@hesbynett.no> - 2019-01-05 15:42 +0100
      Re: calling argumentless function with argument Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-05 14:58 +0000
    Re: calling argumentless function with argument "Pascal J. Bourguignon" <pjb@informatimago.com> - 2019-01-05 16:11 +0100
    Re: calling argumentless function with argument Richard Damon <Richard@Damon-Family.org> - 2019-01-05 11:23 -0500
      Re: calling argumentless function with argument Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-05 16:53 +0000
        Re: calling argumentless function with argument Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-01-06 00:46 +0000

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