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Re: C/C++ question about dynamic "static struct"

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++, comp.lang.c
Subject	Re: C/C++ question about dynamic "static struct"
Date	Thu, 18 Oct 2012 12:19:39 +1300
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Cross-posted to 2 groups.

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On 10/18/12 10:47, gus gassmann wrote:
>
>               myStruct = new MyStruct[ndim];
>               for (int i=0; i<  ndim; i++)
>               {
>                   myStruct[i] = {{(const)(get_str().c_str()), 0,
> get_int()}};
>               }

As others have correctly pointed out, the mistyped cast from std::string 
will end in tears.  You need to convert the string to an char array and 
keep track of that data for later disposal.

Something like this my help:

struct FromString
{
   static std::vector<char*> stash;

   char *p;

   FromString( const std::string& s )
     : p(new char[s.size()])
   {
     s.copy(p, s.size());
     stash.push_back(p);
   }

   operator char*() const { return p; }
};

std::vector<char*> FromString::stash;  // *free these later!!*

Then you could write:

   for (int i=0; i < ndim; i++)
   {
     MyStruct temp = {FromString(get_str()), 0, get_int()};
     myStruct[i] = temp;
   }

Note I kept the temporary variable to avoid the use C++11 extended 
initialiser lists.

-- 
Ian Collins

Thread

C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-17 06:49 -0300
  Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-17 13:08 +0200
    Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:19 -0400
    Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-17 15:19 +0000
    Re: C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-17 18:47 -0300
      Re: C/C++ question about dynamic "static struct" Ike Naar <ike@iceland.freeshell.org> - 2012-10-17 22:46 +0000
        Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:13 +0000
      Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 18:58 -0400
        Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-18 09:55 +0200
          Re: C/C++ question about dynamic "static struct" jacob navia <jacob@spamsink.net> - 2012-10-18 10:13 +0200
            Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 08:23 +0000
              Re: C/C++ question about dynamic "static struct" jacob navia <jacob@spamsink.net> - 2012-10-18 11:17 +0200
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 23:37 +1300
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-18 15:35 +0100
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 11:40 -0700
            Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 21:45 +1300
            Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-18 15:03 +0100
          Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-18 07:18 -0400
            Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-18 17:43 +0200
          Re: C/C++ question about dynamic "static struct" William Ahern <william@wilbur.25thandClement.com> - 2012-10-18 13:52 -0700
            Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-19 21:34 +1300
            Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-19 11:03 +0200
              Re: C/C++ question about dynamic "static struct" "BartC" <bc@freeuk.com> - 2012-10-20 14:03 +0100
            Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:27 +0000
              Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-19 13:43 +0200
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 12:46 +0000
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-19 10:14 -0700
                Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-19 14:53 -0500
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 13:52 -0700
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-19 14:13 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:24 +0000
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-20 11:47 +1300
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:22 +0000
              Re: C/C++ question about dynamic "static struct" William Ahern <william@wilbur.25thandClement.com> - 2012-10-19 11:21 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 21:29 +0000
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 18:53 -0400
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-20 12:13 +1300
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-20 05:55 +0000
                Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-20 13:24 +0200
                Re: C/C++ question about dynamic "static struct" Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-20 12:54 +0100
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-20 06:45 -0700
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 09:20 +1300
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-20 22:28 +0200
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:05 +0000
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:23 -0500
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:32 +0000
                Re: C/C++ question about dynamic "static struct" "BartC" <bc@freeuk.com> - 2012-10-21 11:56 +0100
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 12:54 -0500
                Re: C/C++ question about dynamic "static struct" ptyxs <kerloch@gmail.com> - 2012-10-22 13:43 +0200
                Re: C/C++ question about dynamic "static struct" gwowen <gwowen@gmail.com> - 2012-10-26 03:37 -0700
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-26 07:33 -0500
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:14 -0700
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:08 -0700
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-20 13:44 -0500
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 09:09 +1300
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-20 22:31 +0200
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:11 -0500
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 20:28 +1300
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:40 +0000
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:31 -0500
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:41 +1300
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 16:24 -0500
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 15:05 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 07:52 +0000
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-22 14:02 -0500
                Re: C/C++ question about dynamic "static struct" gwowen <gwowen@gmail.com> - 2012-10-26 03:41 -0700
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-26 07:53 -0500
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-26 09:51 -0400
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-26 13:48 -0400
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-26 07:35 -0700
                Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-26 18:42 -0500
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 04:21 -0700
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-27 05:04 -0700
                Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 08:06 -0500
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 06:50 -0700
                Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 11:13 -0500
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 12:02 -0700
                Re: C/C++ question about dynamic "static struct" Paavo Helde <myfirstname@osa.pri.ee> - 2012-10-27 15:46 -0500
                Re: C/C++ question about dynamic "static struct" ImpalerCore <jadill33@gmail.com> - 2012-10-27 20:24 -0700
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-27 20:11 +0200
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:43 -0700
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 13:52 -0500
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 14:40 -0500
                Re: C/C++ question about dynamic "static struct" google@ianshome.com - 2012-10-23 12:03 -0700
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:35 -0700
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-27 14:24 -0500
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:36 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:08 +0000
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 02:51 -0500
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-21 21:09 +1300
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 12:16 +0100
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 11:55 +0100
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:47 -0500
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:46 +1300
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 03:02 +0100
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:04 +0000
                Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-21 18:54 +0000
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 08:49 +1300
                Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-21 20:07 +0000
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 13:53 -0700
                Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-22 09:54 +1300
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 02:41 +0100
                Re: C/C++ question about dynamic "static struct" Tobias Müller <troplin@bluewin.ch> - 2012-10-22 06:12 +0000
                Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-22 20:52 +0000
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-22 16:30 -0700
                Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-23 11:22 +0200
                Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-23 16:58 +0000
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-22 02:22 +0100
                Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:30 -0700
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-20 09:06 -0400
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-20 07:43 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:11 +0000
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 11:56 +0100
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-21 07:43 -0400
                Re: C/C++ question about dynamic "static struct" Öö Tiib <ootiib@hot.ee> - 2012-10-21 10:36 -0700
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:13 +0000
                Re: C/C++ question about dynamic "static struct" Steve Thompson <stevet810@gmail.com> - 2012-10-22 15:08 +0000
                Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-22 14:42 -0400
                Re: C/C++ question about dynamic "static struct" Rui Maciel <rui.maciel@gmail.com> - 2012-10-21 10:12 +0100
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-20 13:24 -0500
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:16 +0000
                Re: C/C++ question about dynamic "static struct" Les Cargill <lcargill99@comcast.com> - 2012-10-21 13:57 -0500
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-22 08:17 +0000
              Re: C/C++ question about dynamic "static struct" Fritz Wuehler <fritz@spamexpire-201210.rodent.frell.theremailer.net> - 2012-10-20 22:41 +0200
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-21 01:04 +0200
                Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:23 +0000
            Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-21 19:33 +0000
              Re: C/C++ question about dynamic "static struct" Greg Martin <greg@softsprocket.com> - 2012-10-21 13:20 -0700
                Re: C/C++ question about dynamic "static struct" Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-23 15:44 +0000
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-23 20:01 +0200
                Re: C/C++ question about dynamic "static struct" Stuart <DerTopper@web.de> - 2012-10-24 12:01 +0200
                Re: C/C++ question about dynamic "static struct" Dombo <dombo@disposable.invalid> - 2012-10-24 20:31 +0200
          Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-20 06:13 -0700
            Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-21 07:25 +0000
              Re: C/C++ question about dynamic "static struct" Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-10-27 05:54 -0700
          Re: C/C++ question about dynamic "static struct" Old Wolf <oldwolf@inspire.net.nz> - 2012-11-11 14:58 -0800
            Re: C/C++ question about dynamic "static struct" gof@somewhere.invalid (Adam Wysocki) - 2012-11-12 10:33 +0000
      Re: C/C++ question about dynamic "static struct" Ian Collins <ian-news@hotmail.com> - 2012-10-18 12:19 +1300
    Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:06 +0000
      Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-18 11:36 +0200
        Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:28 +0000
          Re: C/C++ question about dynamic "static struct" Noob <root@127.0.0.1> - 2012-10-19 12:07 +0200
            Re: C/C++ question about dynamic "static struct" gus gassmann <gus@nospam.com> - 2012-10-19 08:03 -0300
              Re: C/C++ question about dynamic "static struct" Fritz Wuehler <fritz@spamexpire-201210.rodent.frell.theremailer.net> - 2012-10-20 07:14 +0200
          Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 06:58 -0400
  Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:29 -0400
  Re: C/C++ question about dynamic "static struct" Richard Damon <news.x.richarddamon@xoxy.net> - 2012-10-17 08:35 -0400
    Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-17 08:49 -0400
    Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-18 07:10 +0000
      Re: C/C++ question about dynamic "static struct" Keith Thompson <kst-u@mib.org> - 2012-10-18 12:11 -0700
        Re: C/C++ question about dynamic "static struct" Juha Nieminen <nospam@thanks.invalid> - 2012-10-19 09:30 +0000
          Re: C/C++ question about dynamic "static struct" Keith Thompson <kst-u@mib.org> - 2012-10-19 03:05 -0700
          Re: C/C++ question about dynamic "static struct" James Kuyper <jameskuyper@verizon.net> - 2012-10-19 07:37 -0400

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