frederic.bron@alcan.com wrote:
Dear boost implementers, TypeTraits is very useful, thanks you. However, recently, I needed something to know if a type is comparable (with operator<) and that was not in the library. Fortunately, somebody forwarded me an earlier post on the users list where I could find what I wanted. The implementation was inspired from boost/detail/is_incrementable.hpp I have written is_less_comparable, is_less_equal_comparable, is_greater_comparable... inspired from the same source and I wonder if it could be possible to add it to the library as I think it could be helpful for others. I give the source code below (if it is useful) but I am not able to make it fully general as it is in boost/type_traits. In particular, I do not understand all the macros that are used.
This has come up often enough that I think this is an excellent idea: I'd be happy to help with macro usage and other details, but the most important thing is for some docs and tests to get written :-) It might also be useful to have a very quick mini-review of an addition like this so folks can check that the names are all sensible choices etc (I have a couple of minor additions that might benifit similarly). If it would help I could set up a directory in the sandbox to add all the changes to? Regards, John Maddock.