Re: Propagating results from callbacks?

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: Propagating results from callbacks?
Date	2019-02-12 23:56 +0000
Organization	A noiseless patient Spider
Message-ID	<871s4cmuhs.fsf@bsb.me.uk> (permalink)
References	(4 earlier) <9fadad8f-c294-4242-834e-68ea412feb65@googlegroups.com> <1f3d1d8b-1ce9-46c0-acdc-f852b57d5004@googlegroups.com> <d029152c-286b-438a-aeaa-6f71d99e7451@googlegroups.com> <e0ac60f3-522c-4722-9f89-1001a518b62e@googlegroups.com> <5ceb5c7f-30b8-4cbd-9315-55ccdd726ce3@googlegroups.com>

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luser droog <luser.droog@gmail.com> writes:

> On Tuesday, February 12, 2019 at 2:32:06 AM UTC-6, fir wrote:
>> W dniu niedziela, 10 lutego 2019 23:14:21 UTC+1 użytkownik fir napisał:
<cut>
>> > to be honest most annoying thing when writing c sompiler i found
>> > that sily thing: format of writing negative numbers as -321 and so
>> > on i mean using "-" sign in souble role as a part of integer value
>> > and as an proper operator, this is real annoying (or at least
>> > seemed annoying to me) (to this extent i think if to not redefine
>> > it)

You don't need to worry about that because, in C, '-' is never part of
an integer constant, it is always an operator.

>> i would probably introduce "shorter minus" sign, that would be used
>> to note negative number, and would look like -2 but being helf short
>> and be to rightside
>> 
>> what if i want introduce this kind of sign in my language? is that in
>> unicode and i just can write unicode texts or there is empty space in
>> unicode i can use, or what?
>
> There's probably something like that somewhere in Unicode.

Unicode has several dashes of different length and, more significantly,
distinguishes between the hyphen: '-' and the minus sign: '−'.

> There's probably a way of requesting new glyphs. But you could also
> use the existing practice of APL which has 2 minus signs. Regular
> minus - is the function. High Minus ¯ is the decorator for negative
> numbers.

This is a much better idea because it's more obvious.  Having syntax
errors caused by using the wrong length dash is just asking for trouble.
But then there the original problem is non-existent because the token
'-' is always an operator in C and is never part of an integer constant.

-- 
Ben.

Thread

Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-08 16:32 -0800
  Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-08 17:08 -0800
    Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-09 20:01 -0800
      Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-10 15:21 +0000
        Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-10 12:59 -0800
          Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-10 13:49 -0800
            Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-10 14:14 -0800
              Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-12 00:31 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-12 00:45 -0800
                Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-12 14:30 -0800
                Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-12 23:56 +0000
                Re: Propagating results from callbacks? Reinhardt Behm <rbehm@hushmail.com> - 2019-02-13 12:54 +0800
                Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-13 11:16 +0000
                Re: Propagating results from callbacks? Andrew Smallshaw <andrews@sdf.org> - 2019-02-13 15:41 +0000
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 03:02 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 03:30 -0800
                Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-13 11:48 +0000
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 03:59 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 04:10 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 04:29 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 04:40 -0800
                Re: Propagating results from callbacks? Bart <bc@freeuk.com> - 2019-02-13 12:08 +0000
                Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-13 14:40 +0000
                Re: Propagating results from callbacks? Bart <bc@freeuk.com> - 2019-02-13 14:54 +0000
                Re: Propagating results from callbacks? David Brown <david.brown@hesbynett.no> - 2019-02-13 16:12 +0100
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 10:00 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 10:49 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 11:08 -0800
                Re: Propagating results from callbacks? Bart <bc@freeuk.com> - 2019-02-13 19:10 +0000
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 12:31 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 13:24 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 12:40 -0800
                Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-13 13:06 -0800
                Re: Propagating results from callbacks? David Brown <david.brown@hesbynett.no> - 2019-02-13 20:33 +0100
                Re: Propagating results from callbacks? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-13 15:49 +0000
          Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-12 15:19 -0800
            Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-12 19:02 -0800
              Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-13 11:26 -0800
                Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-13 16:09 -0800
                Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-14 15:41 -0800
                Re: Propagating results from callbacks? luser droog <luser.droog@gmail.com> - 2019-02-14 16:42 -0800
  Re: Propagating results from callbacks? fir <profesor.fir@gmail.com> - 2019-02-10 05:14 -0800

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