[boost] The perfect tutorial example?

From: David Abrahams (dave_at_[hidden])
Date: 2005-07-08 01:51:59

I'm trying to come up with an example function to use in the tutorial
for the parameters library.  The function would ideally:

* have four or fewer parameters, most of which have defaults.

* have at least one defaulted parameter whose type would normally be a
  deduced function template parameter (when the argument is passed
  explicitly)

* have a parameter whose default depends on the value of another
  parameter

* have at least one parameter whose default value is of nontrivial
  complexity to compute (so I can demonstrate lazy defaults).

* be realistic

Any ideas would be most welcome.

Thanks,

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com