Re: [Boost-users] read_graphviz question

Hello Jeffrey, 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 ( 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 prevent exceptions: 1) Create a class that derives from dynamic_property_map but does nothing interesting with get or put 2) Create a factory function that returns std::auto_ptr of these objects 3) Pass this as the argument to your dynamic_property_map constructor. HTH, ron On Jan 11, 2007, at 7:35 PM, Jeffrey Holle wrote:

I'm using the post 1.31.1 version of boost, which has a much nicer read_graphviz function.

I'm wondering if there is a way to "ignore" unwanted properties, something akin to sending them to /dev/null.

My present experience is that if an unexpected property is found, an exception is thrown.

Is there a way to express that a given property is to be ignored?

Better yet, is there a way to say that all unexpected properties are to be ignored?

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