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From: John Maddock (john_at_[hidden])
Date: 2008-08-07 07:07:35

frederic.bron_at_[hidden] wrote:
>> 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
>> :-)
> OK, I obtained so much from boost that I agree to try to do the job
> my-self with some help.
> As I have never done this before, could you give me a
> procedure/formats to follow?

OK, first off there's an email invitaion to the Sandbox on it's way, once
you're signed up then checkout using:

svn co [local-path]

and you'll find a copy of the type_traits lib under /type_traits/.

I've already added the two traits I was working on to this, feel free to add
yours as well.

Procedure wise, if you can follow the existing structure that would be
great: use one header per trait and one one .cpp file for each trait test

For these traits, can we boilerplate the whole thing so that defining a
trait for any binary operator is just something like:

#define BOOST_TT_TRAIT_NAME is_equality_comparible
#define BOOST_TT_TRAIT_OP ==
#include <boost/type_traits/detail/binary_op_traits.hpp>

?? Maybe the same for the tests as well if they're very repetitive?

With regard to macro usage, the easiest way is to define say for example
boost::detail::is_equality_comparible_imp with a member "value" that is
either true or false, and then add:


To take care of the MPL etc support.

Docs require quickbook and xslt support, installation instructions here:

Try making sure that you can build the existing docs, and then ping for help
if you need it with the quickbook formatting: if you copy an existing traits
class and modify that it should be fairly obvious I hope!

HTH, John.

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