Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #72744

Re: Error handling in a parser (return value or setjmp)

From Ian Collins <ian-news@hotmail.com>
Newsgroups comp.lang.c
Subject Re: Error handling in a parser (return value or setjmp)
Date 2015-10-14 10:32 +1300
Message-ID <d85bjpFlf7cU3@mid.individual.net> (permalink)
References (1 earlier) <87mvvmdihg.fsf@bsb.me.uk> <dbfb2a3c-67b7-42de-aeff-a87742edbcf4@googlegroups.com> <mvjake$fm3$1@speranza.aioe.org> <d851roFlf7cU2@mid.individual.net> <mvjo7n$hac$1@speranza.aioe.org>

Show all headers | View raw

Morten W. Petersen wrote:
> On 13.10.2015 20:46, Ian Collins wrote:
>> Morten W. Petersen wrote:
>>> On 13.10.2015 17:26, supercat@casperkitty.com wrote:
> [...]
>>>
>>> Is it possible to look back up in the call stack, to search for a given
>>> point and restore to that?
>>
>> If you want C++ like exception handling, you know whee to look!
>
> Hmm, no, I don't want to rely on C++. :)
>
> I found this thing though:
>
>     http://www.nicemice.net/cexcept/
>
> Which is a exception system for C.  So there are alternatives, I
> just have to find the best one.

Be very wary of any exception system for C.  The C language does not 
have specific support or writing exception safe code.  You will have to 
code defensively assuming any place (possibly any function call) where 
the code may "throw" could be an early return.  There isn't any way to 
clean up the stack on a "throw", so unless you intend to do little more 
than call exit() at the "catch" point, you are asking for trouble.  You 
may as well just terminate when you hit an error.

-- 
Ian Collins

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 04:33 +0200
  Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-13 15:54 +1300
    Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 05:07 +0200
  Re: Error handling in a parser (return value or setjmp) Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-13 14:07 +0100
    Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 16:17 +0200
    Re: Error handling in a parser (return value or setjmp) supercat@casperkitty.com - 2015-10-13 08:26 -0700
      Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 18:14 +0200
        Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 07:46 +1300
          Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 22:06 +0200
            Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 10:32 +1300
              Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 23:47 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 11:02 +1300
                Re: Error handling in a parser (return value or setjmp) Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-14 18:32 +0000
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-15 12:28 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-16 07:47 +1300
            Re: Error handling in a parser (return value or setjmp) Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-13 21:39 +0000
              Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-13 23:49 +0200
                Re: Error handling in a parser (return value or setjmp) supercat@casperkitty.com - 2015-10-13 15:03 -0700
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-14 01:16 +0200
                Re: Error handling in a parser (return value or setjmp) Geoff <geoff@invalid.invalid> - 2015-10-13 16:46 -0700
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-14 02:13 +0200
                Re: Error handling in a parser (return value or setjmp) Geoff <geoff@invalid.invalid> - 2015-10-13 19:10 -0700
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-14 04:27 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 16:05 +1300
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-14 05:18 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 16:31 +1300
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-14 05:44 +0200
                Re: Error handling in a parser (return value or setjmp) Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-15 12:06 +0000
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-15 16:08 +0200
                Re: Error handling in a parser (return value or setjmp) supercat@casperkitty.com - 2015-10-14 00:36 -0700
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-15 12:32 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-14 11:06 +1300
                Re: Error handling in a parser (return value or setjmp) David Brown <david.brown@hesbynett.no> - 2015-10-14 00:10 +0200
                Re: Error handling in a parser (return value or setjmp) James Kuyper <jameskuyper@verizon.net> - 2015-10-13 19:08 -0400
              Re: Error handling in a parser (return value or setjmp) raltbos@xs4all.nl (Richard Bos) - 2015-10-14 11:37 +0000
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-15 12:34 +0200
                Re: Error handling in a parser (return value or setjmp) Ian Collins <ian-news@hotmail.com> - 2015-10-16 07:56 +1300
                Re: Error handling in a parser (return value or setjmp) "Morten W. Petersen" <morphex@gmail.com> - 2015-10-16 05:45 +0200
            Re: Error handling in a parser (return value or setjmp) James Kuyper <jameskuyper@verizon.net> - 2015-10-13 18:53 -0400

csiph-web