[boost] Re: [range] BOOST_RANGE_DEDUCED_TYPENAME

From: David Abrahams (dave_at_[hidden])
Date: 2005-03-03 14:33:37

"Thorsten Ottosen" <nesotto_at_[hidden]> writes:

> "Jody Hagins" <jody-boost-011304_at_[hidden]> wrote in message 
> news:20050302125807.4bb8b676.jody-boost-011304_at_atdesk.com...
> |
> | In range/config.hpp, I see this code...
> |
> |
> | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
> | #define BOOST_RANGE_DEDUCED_TYPENAME
> | #else
> | #define BOOST_RANGE_DEDUCED_TYPENAME BOOST_DEDUCED_TYPENAME
> | #endif
> |
> |
> | Why is there a special version of this?
>
> I guess the explanation would be historic reasons, I used it in some 
> workaround code. It will go away in the next release.

It's on my outstanding mental list of Boost-wide changes that
BOOST_DEDUCED_TYPENAME should be changed simply to BOOST_TYPENAME,
because it's used in all kinds of contexts where there's no deduction
involved.  Older compilers simply need a disappearing "typename"
keyword, and that's the role that it fills.

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