[boost] [graph]matching example is not consistent

Subject: [boost] [graph]matching example is not consistent
From: Takatoshi Kondo (redboltz_at_[hidden])
Date: 2013-03-01 01:51:18

Hello,

I found some inconcistency on the following example:
http://www.boost.org/doc/libs/1_53_0/libs/graph/example/matching_example.cpp

This code has graph diagrams as follows:
           0       1---2       3
            \     /     \     /
             4---5       6---7
             |   |       |   |
             8---9      10---11
            /     \     /     \
     12   13      14---15      16   17

Vertices 1 and 2 is connected on the diagram. But "add_edge(1,2,g)"
isn't called.
I attached the patch that adds the code above. After applying the
patch, result is changed.
But I think that the essence of the example is not changed.

Thanks,
Taka