[boost] BOOST_NO_RESULT_OF

From: David Abrahams (dave_at_[hidden])
Date: 2005-05-11 09:12:48

I want this macro for the parameters library.

Currently, result_of uses 

#if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

And otherwise, gives an

 #error

That makes it hard to use portably, because the criteria under which
result_of will be supported are not encapsulated, and I couldn't even
define it in that file usefully (I'd still get an #error when it isn't
supported).

Shouldn't there be a generalized way to handle this sort of situation?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com