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From: horstman@mathcs.sjsu.edu (Cay Horstmann)
Newsgroups: comp.lang.c++
Subject: Re: c++ storage management of arrays
Keywords: c++
Message-ID: <1991Feb10.024945.9137@mathcs.sjsu.edu>
Date: 10 Feb 91 02:49:45 GMT
References: <21795@rasp.eng.cam.ac.uk>
Organization: San Jose State University - Math/CS Dept.
Lines: 16

In article <21795@rasp.eng.cam.ac.uk> act@eng.cam.ac.uk (A.C.Thornton) writes:
>I have a question about the allocation of arrays of classes.  How
>do I increase the size of an array of classes after I've already
>allocated it using "new."  

Unfortunately, you cannot easily do that except for the obvious solution
of allocating a bigger array and copying over the existing elements. 

Note that you CANNOT use memcpy to copy the existing elements if the array
contains objects with nontrivial copy semantics. 

For syntactic sugar, you could define an overloaded operator new
for this case ( like a = new T[50] , /* ... */ a = new(a) T[100]; )
Note that the new to be changed is the global ::new. 

Cay