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List: boost-users
Subject: Re: [Boost-users] Adding additional property in Boost graph object.
From: Jeremiah Willcock <jewillco () osl ! iu ! edu>
Date: 2009-11-30 20:48:48
Message-ID: alpine.LRH.2.00.0911301546270.16958 () flowerpot ! osl ! iu ! edu
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On Mon, 30 Nov 2009, Amanullah Yasin wrote:
> Hi,
> Dear all
>
> I want to add one additional edge property in Boost graph object of type "bool". \
> Please guide me how i can do it. I tried but not successful.
> ////////////////////// Here is the main definition of Boost graph object "slGraph" \
> ///////////////////////////////////////////////////////////////////////// namespace \
> boost { struct computable_object_t
> {
> typedef vertex_property_tag kind;
> };
> }
>
> typedef boost::property<boost::vertex_index_t, unsigned int,
> boost::property<boost::computable_object_t,
> plComputableObject*> > slVertexProperty;
>
> typedef boost::property<boost::edge_weight_t, slScoreValueType> slEdgeProperty;
>
> typedef boost::adjacency_list<boost::vecS, boost::listS, boost::bidirectionalS,
> \ slVertexProperty, slEdgeProperty> slGraph;
>
> typedef slGraph::vertex_descriptor slNode;
> typedef slGraph::edge_descriptor slEdge;
> typedef slGraph::vertex_iterator slNodeIterator;
> typedef slGraph::edge_iterator slEdgeIterator;
> typedef slGraph::out_edge_iterator slOutEdgeIterator;
> typedef slGraph::in_edge_iterator slInEdgeIterator;
> typedef slGraph::adjacency_iterator slOutNodeIterator;
> typedef slGraph::inv_adjacency_iterator slInNodeIterator;
You don't need to put your property tag in the boost namespace. Is there
anything you tried to do to add the new property and failed? You can just
add a new element to the chain of boost::property elements for your edge
properties (slEdgeProperty), given your property tag (see the definition
of computable_object_t for how to create a tag, but use edge_property_tag
for yours). You can also use bundled properties
(http://www.boost.org/doc/libs/1_41_0/libs/graph/doc/bundles.html) which
will greately simplify adding properties.
-- Jeremiah Willcock
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