[boost] boost::random Unneceassry standard stream definitions

From: Michael Stevens (Michael.Stevens_at_[hidden])
Date: 2004-08-24 13:36:23

In boost::random the random number generators #include <iostream>

This introduces the unnecessary definitions of the standard stream cin, cout 
etc. These are not required to define the stream operations and will fail on 
runtime environments which cannot define the default streams.

It would be better to use instead:
#include <istream>
#include <ostream>

On indeed only the forward definition are required to define stream operations
#include <iosfwd>

The latter requires that when the templates are instantiated a stream 
definition exists.

Michael
-- 
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Michael Stevens Systems Engineering
Navigation Systems, Estimation  and
                 Bayesian Filtering
    http://bayesclasses.sf.net
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