ntrusively monitor stochastic
processes.  However, several do provide a special device for exactly
this purpose.  It seems to be impossible to emulate the functionality
using Standard C++ only, so users should be aware that this class may
not be available on all platforms.

<h3>Members</h3>

<pre>explicit random_device(const std::string& token = default_token)</pre>

<strong>Effects:</strong> Constructs a <code>random_device</code>,
optionally using the given <code>token</code> as an access
specification (f