Re: [Boost-users] [graph][spirit][variant] Boost.Graph and Boost.Spirit incompatible ?

Subject: Re: [Boost-users] [graph][spirit][variant] Boost.Graph and Boost.Spirit incompatible ?
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-03-04 17:35:52

On Thu, 4 Mar 2010, Steven Watanabe wrote:

> AMDG
>
> Jeremiah Willcock wrote:
>> I looked at changing the key_type in get to something that would SFINAE out 
>> and there isn't one: the farthest I could go is 
>> property_traits<IndexMap>::value_type (key_type in the code is a bug), and 
>> that class will fail to instantiate (non-SFINAE) on bad index map types. 
>> That can be specialized, so I can't fall back to the default definition of 
>> value_type inside it.  I don't see a general-purpose solution to problem 
>> right now.
>
> Would this break anything?
>
> template<typename PA>
> struct property_traits : PA {};

That plus changing two_bit_property_map to use it passes the BGL, PBGL, 
and property_map test cases.  Does it work to fix all of the known variant 
problems?

-- Jeremiah Willcock