Re: Octave/C++

[Mike Morley]

It occured to me that I needed to allocate some memory to my robot, 
otherwise it would cease to be when the C++ subroutine exited. I now have 
the code:

#include<iostream>
#include<octave/oct.h>
#include<octave/dynamic-ld.h>
#include<string>

using namespace std;

extern "C" {
 #include "robot_instr.h"
 #include "robot_link.h"
}

class Bot: public octave_base_value
{
public:
 //constructor
 Bot(void): octave_base_value()
 {
   robot_link robot;
 }

 //destructor
 ~Bot(void)
 {
     delete this;
 }

 DECLARE_OCTAVE_ALLOCATOR

};


DEFINE_OCTAVE_ALLOCATOR (Bot);



 DEFUN_DLD(BotMake,,nargouts,
            "BotMake creates a new robot to link in to")
{
   Bot *b = new Bot();
 return octave_value(b);
}
 DEFUN_DLD(BotKill,args,,
            "BotKill destroys the Bot")
{
 if (args.length() == 1) {
   delete ((Bot*)&args(0));
 }
}

However, this now produces the error:
Bot.cpp: In function (character rendered as a-circumflex):
Bot.cpp:49: warning: taking address of temporary

And the error: "Segmentation Fault" when I run BotMake in octave

I don't really understand what this means. Any help would be appreciated.



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