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From: wicklund@intellistor.com (Tom Wicklund)
Newsgroups: comp.lang.c++
Subject: Re: How are strings efficiently concatenated?
Message-ID: <1991Jun17.234430.8877@intellistor.com>
Date: 17 Jun 91 23:44:30 GMT
References: <2825@umriscc.isc.umr.edu>
Organization: Intellistor
Lines: 17

In <2825@umriscc.isc.umr.edu> jamesh@cs.umr.edu (James Hartley) writes:

>The expression s1 + s2 will allocate space for "onetwo", but s0 will create
>a new copy "onetwo".  How is the intermediate string deallocated?  What I
>would really like to do is write efficient code for the following --

>        s0 = s1 + s2 + s3;


Another way is to implement an append operation analagous to the "<<"
of stream output:

   s0 = "";
   s0 << s1 << s2 << s3;

Ideally this should then be merged into streams so that a string can
act as an input or output stream.