Re: Scopes of identifiers

Newsgroups	comp.lang.c
Date	2019-04-12 05:29 -0700
References	(2 earlier) <lnk1g12nx8.fsf@kst-u.example.com> <q8o2mg$21k$1@dont-email.me> <dkMrE.99323$DD7.57717@fx05.iad> <c02250b3-87cc-4b99-9bd6-1bb64658971d@googlegroups.com> <87tvf49j60.fsf@bsb.me.uk>
Message-ID	<4ce6da9f-e65c-4c25-b92c-be8d0399343c@googlegroups.com> (permalink)
Subject	Re: Scopes of identifiers
From	Thiago Adams <thiago.adams@gmail.com>

Show all headers | View raw

On Thursday, April 11, 2019 at 9:11:42 PM UTC-3, Ben Bacarisse wrote:
> Thiago Adams  writes:
> <cut>
> > I wish I could understand how C started because the [feeling] is
> > that the design is almost by accident.
> 
> Not really by accident, but early C has a sense of being "just enough"
> to get by.  For example (directly related to your topic), in early C,
> struct members were not associated with structs -- they were simply a
> type and offset.  You could write

Very interesting.
To fair, I think it is important to say that some design of 
the language was limited by the hardware they have at the time.

For instance, I believe they didn't check function arguments 
at the begging and this saved some memory.

I think no 1 priority was to generate code.

I like this document:
Recent Changes to C, November 15, 1978
https://www.bell-labs.com/usr/dmr/www/cchanges.pdf

The reason is because enum is a very high level concept
in my opinion. There is no enum type inside machines and
this feature would unlock new possibilities in code generation

Enum is all about making the language better to use.
So in 1978 we had this feature included. 

Comparing with _Bool, that is also a high level feature
(using the same logic - we don't have bools inside the machine)
it was only included in C99.

The other feature added was struct assignment and there is one
interesting comment:

"Other plausible operators, such as equality comparison, have
not been implemented"

Thread

Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-10 16:15 -0700
  Re: Scopes of identifiers Bart <bc@freeuk.com> - 2019-04-11 00:33 +0100
    Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-10 16:45 -0700
    Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-10 18:31 -0700
  Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-10 16:34 -0700
    Re: Scopes of identifiers Robert Wessel <robertwessel2@yahoo.com> - 2019-04-10 20:50 -0500
    Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-10 20:02 -0700
    Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-10 20:58 -0700
      Re: Scopes of identifiers luser droog <luser.droog@gmail.com> - 2019-04-10 21:48 -0700
      Re: Scopes of identifiers Andrey Tarasevich <andreytarasevich@hotmail.com> - 2019-04-11 11:57 -0700
        Re: Scopes of identifiers scott@slp53.sl.home (Scott Lurndal) - 2019-04-11 19:12 +0000
          Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-11 12:35 -0700
            Re: Scopes of identifiers Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-04-12 01:11 +0100
              Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-12 05:29 -0700
                Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-12 05:39 -0700
        Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-11 14:00 -0700
          Re: Scopes of identifiers Nick Bowler <nbowler@draconx.ca> - 2019-04-15 19:48 +0000
    Re: Scopes of identifiers Bart <bc@freeuk.com> - 2019-04-11 10:36 +0100
      Re: Scopes of identifiers Bart <bc@freeuk.com> - 2019-04-11 14:25 +0100
        Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-11 10:20 -0700
    Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-11 05:00 -0700
    Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-11 06:42 -0700
      Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-11 08:11 -0700
  Re: Scopes of identifiers BGB <cr88192@gmail.com> - 2019-04-10 22:35 -0500
    Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-10 22:04 -0700
      Re: Scopes of identifiers BGB <cr88192@gmail.com> - 2019-04-11 05:46 -0500
  Re: Scopes of identifiers John Bode <jfbode1029@gmail.com> - 2019-04-11 12:04 -0700
    Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-11 13:18 -0700
    Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-11 14:31 -0700
  Re: Scopes of identifiers Andrey Tarasevich <andreytarasevich@hotmail.com> - 2019-04-11 12:28 -0700
    Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-11 12:50 -0700
    Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-11 14:20 -0700
      Re: Scopes of identifiers Thiago Adams <thiago.adams@gmail.com> - 2019-04-11 14:43 -0700
      Re: Scopes of identifiers Andrey Tarasevich <andreytarasevich@hotmail.com> - 2019-04-11 15:04 -0700
        Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-11 17:08 -0700
          Re: Scopes of identifiers Andrey Tarasevich <andreytarasevich@hotmail.com> - 2019-04-11 18:45 -0700
            Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-11 23:16 -0400
            Re: Scopes of identifiers Keith Thompson <kst-u@mib.org> - 2019-04-11 20:19 -0700
            Re: Scopes of identifiers Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-04-12 14:39 -0700
            Re: Scopes of identifiers Ike Naar <ike@sdf.lonestar.org> - 2019-04-13 20:02 +0000
      Re: Scopes of identifiers James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-04-11 23:26 -0400

csiph-web