@related: [[CPlusPlus]] [[ptr]]

allocation functions seems to work even if [[null]] pointer [[address]] passed as [[reference]] ?


<code>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;

#define cdebug cout
#define TRACE(x) { cdebug<<#x<<"="<<(x)<<endl; }


int falloc(char*& p, int & l)
{
 cdebug<<__FILE__  <<":" <<__LINE__ << " ("<< __PRETTY_FUNCTION__<<")"<<endl;
 cdebug<<(hex)<<(void*)&p<<endl; // non null address : ok
 l=1;
 p = new char[l];
 p[0]='1';
}

int main(int argc, char* argv[])
{
 {
   char* p = 0; int l=1;
   TRACE( falloc(p,l) );
   cdebug<<p[0]<<endl; // ok:1
 }
 {
   char* p = (char*) "0"; int l=1;
   TRACE( falloc(p,l) );
   cdebug<<p[0]<<endl; // ok:1
 }
 exit(0);
}
</code>


==== misc ====

  * http://www.frogatto.com/?p=3
  * http://cslibrary.stanford.edu/104/
  * http://www.penspinning.fr/s777-at-thetournament-2011-3544