The docs for function_traits.. http://www.boost.org/libs/type_traits/index.html#function_traits Don't mention if the traits work just for function types. Or if they will also work with function objects. Does it? -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - Grafik/jabber.org