Property Map deep copy

From: Björn Lindberg (yg-boost-users_at_[hidden])
Date: 2002-11-01 11:23:26

I have an external iterator_property_map to an adjacency_list, using
std::vector to store std::string as values. I need to copy this map, but
a deep copy so that all the strings are unique to the copy. Is there an
easy way to do this? I thought about constructing a new property map
from a copy of the underlying vector, but this presents two other
questions: (i) will the vertex-to-string mappings of the old map still
be valid in the constructed copy? (ii) is there a way to extract the
underlying vector from the property map?

I couldn't find information on this in the online documentation.

Björn