id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3982	mpl::at documentation out of sync with code	manfred.doudar@…	Aleksey Gurtovoy	"Documentation of mpl::at indicates that it can take either 2 or 3 template parameters, but in fact only takes just 2.  The documentation indicates a third template parameter to forward a default if lookup fails to find a match.  This option does not exist.

Code or Documentation should be amended.  If there will be no 3 template parameter option, the following would be nice to have in the documentation, as how to achieve a default when no match is found:


typename boost::mpl::eval_if<
    typename boost::mpl::has_key< Map, Key >::type
  , boost::mpl::at< Map, Key >
  , boost::mpl::identity< Default >
  >::type  


"	Bugs	new	Boost 1.43.0	mpl	Boost 1.42.0	Problem		mpl::at default