There's a proposal (N1611) "Implicitly-Callable Functions in C++0x" by Walter Brown in the C++ committee's pre-meeting papers. See http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2004/n1611.pdf Given all the Boost work that has gone into math constants, function issues, and to a lesser extent, properties, I'd guess several Boosters might want to comment on Walter's proposal. Strong support from library developers like Boost participants would almost be a requirement for such a proposal to be accepted, IMO. But do remember that only so many proposals can be accepted, and that every proposal that gets accepted pushes some other proposal aside. comp.std.c++ is the best place to post comments, since it is probably read by more of the committee's Evolution Working Group than read the Boost list. See http://groups.google.com/groups?q=comp.std.c%2B%2B for a web interface. A comment on comp.std.c++ should probably be like Boost review; say in plain language if you support or oppose the proposal so detailed comments don't obscure an overall view. (The Boost list is read by many active C++ committee members, but they tend to be library oriented rather than core language or evolution oriented.) An extended discussion of such a proposal would probably stray off-topic for Boost anyhow. --Beman PS: if you are interested in other proposals for the next C++ standard, http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2004/#pre_sydney has a wealth of interesting papers.