Re: [boost] [enable_if] compile failure in trunk

Subject: Re: [boost] [enable_if] compile failure in trunk
From: Tim Blechmann (tim_at_[hidden])
Date: 2011-12-05 11:07:35

> > /home/tim/workspace/boost-trunk/boost/parameter/name.hpp:52:1: error:
> > template argument 2 is invalid
> Note this is the first error, and that's unrelated to enable_if.

not quite: the second template argument which gcc complains about is an 
enable_if ...

> > /home/tim/workspace/boost-trunk/boost/fusion/iterator/equal_to.hpp:77:9:
> > error: expected nested-name-specifier before ‘enable_if’
> This message says a declaration of enable_if is missing.
> Either it's not properly qualified, or equal_to.hpp is not including it
> and was relying on other files to include it, which of course is very
> fragile. (missing includes is a very common bug in many Boost libraries
> though)

ok, there are some references to en/disable_if, which do not use the full 
namespace. i've submitted two patches to parameter and fusion [1,2], but there 
are possibly more issues.

tim

[1] https://svn.boost.org/trac/boost/ticket/6214
[2] https://svn.boost.org/trac/boost/ticket/6215