Re: [boost] [graph] property_value no longer valid for bgl_named_parameters

Subject: Re: [boost] [graph] property_value no longer valid for bgl_named_parameters
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2012-09-04 09:47:10

On Tue, 4 Sep 2012, Alex Hagen-Zanker wrote:

> The transition from  Boost 1.49 to 1.51 gave me a breaking change in the 
> graph library:
>
> Originally I used the property_value struct to get the type of a named 
> parameter, like this:  property_value<bgl_params, Tag>::type;
>
> This no longer works and the current use seems to be: get_param_type<Tag, 
> bgl_params>::type;
>
> Is this a regression? Or was I just using the library in the wrong way?

I refactored things so that named parameters and properties don't use the 
same mechanisms, so property_value will only work on properties now.  You 
should use get_param() and get_param_type for named parameters.

-- Jeremiah Willcock