Re: [Boost-users] read_graphviz question

From: Braddock Gaskill (braddock_at_[hidden])
Date: 2007-03-16 16:01:00

On Tue, 30 Jan 2007 12:02:23 -0500, Ronald Garcia wrote:
> It IS possible to prevent exception throws, but it will require a  
> little work on your part.  dynamic_properties has a constructor of  
> the form:
> dynamic_properties(
>    const boost::function<
>      std::auto_ptr<dynamic_property_map> (
>        const std::string&, const boost::any&, const boost::any&)
>      >& fn)
> 
> If an attempt is made to put() a value for a non-existent key, then  
> this function is used as a factory to create a new  
> dynamic_property_map for those values.  You can use this mechanism to  

Does anyone have a code example of a reasonable implementation of this
dynamic_property_map functor technique to read graphviz dot files with
arbitrary properties?

I've been trying to extract and adapt the bgl python library's nice
read_graphviz function, which implements this dynamic_property_map functor
technique, but it is still not functional after several hours of template
struggles.

I have been using a (long) hard-coded property list for read_graphviz in my
code for the past year, but there are so many obscure dot file properties that
it is still very hit-or-miss.

Thanks.