Path: utzoo!attcan!uunet!mcvax!ukc!icdoc!citycs!ba124
From: ba124@citycs.UUCP (K.A.Streater)
Newsgroups: comp.lang.c++
Subject: realloc equivalent in C++
Keywords: realloc, new, delete
Message-ID: <80@citycs.UUCP>
Date: 17 May 89 19:42:27 GMT
Organization: Computer Science, City University, London
Lines: 23

In C++ there are the free storage allocators new and delete, but what about
an equivalent of realloc.  Have I missed it or does it not exist ?

Stroustrup in his example on page 182 of C++ Programming language seems to
indicate that the only way to realloc a block of storage is to create a new
one, and copy all the elements before deleting the old block.

i.e.	in 'C':

	#include <stdlib.h>		/* ANSI header */
	int *address = (int *)malloc(size);
	address = (int *)realloc(address, size*2);

becomes in C++:

	int* address = new int[size];
	int* new_addr = new int[size*2];
	for (int i=0; i<size; i++)
		new_addr[i] = address[i];
	delete address;
	address = new_addr;

Any ideas for a better solution than this ?