"Edward Diener" <[EMAIL PROTECTED]> writes:
> "David Abrahams" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>>
>> In Boost.Python I'm using a system for interfaces such as this one
>> where optional template parameters can be passed in any order. I'm
>> using the properties of the type to detect their meaning. It works
>> great. Using boost/mpl/has_xxx.hpp (and, for compilers which don't
>> support it, is_base_and_derived) should be enough to build a nice
>> policy-based interface.
>
> Is the technique of allowing optional template parameters to be passed in
> any order a part of MPL ? I haven't looked at MPL at all since I didn't see
> it in Boost 1.29 but maybe it is there and I missed it.
No; it's implemented in Boost.Python using MPL components, though.
--
David Abrahams
[EMAIL PROTECTED] * http://www.boost-consulting.com
Boost support, enhancements, training, and commercial distribution
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