[boost] [boost][BGL] Leda-Graph-Adaptor and LEDA-prefix macros

From: Jürgen Hunold (hunold_at_[hidden])
Date: 2002-04-17 09:03:57

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Hi !

I'm trying replace some LEDA-Graph with the BGL-Graph-Data-Structures.
In order to do this, I've decided to use the BGL LEDA_Graph adaptor at 
first, convert my handwritten algorithms to the BGL interface and then 
replace the underlying representation.

Unfortunately, the implementation of <boost/graph/leda_graph.hpp> is not 
quite useful in the current state.
The problem is rooted in LEDA's use of the preprocessor, as mentioned in 
the docs and the BGL book, in order to prefix nearly _everything_ with 
the prefix leda_ . For example, "string" is preprocessed to 
"leda_string".  The use of a simple "#undef string" is possible, but 
quite error prone  
The newer LEDA version (at least 4.1) provides support to disable the 
prefix macros with the LEDA_PREFIX define, which we did.

Now the compiler complains about knowing nothing about "edge","node" and 
"node_map" appearing in  <boost/graph/leda_graph.hpp>.
These should read "leda_edge","leda_node" and "leda_node_map" instead.,
For the time being I've patched  <boost/graph/leda_graph.hpp> so that 
the file contains "leda_edge" instead of "edge" and so on.

I've attached the unified diff against today's cvs.

There are three possible solutions:
1) I disable/enable the LEDA_PREFIX around the boost header 
2) patch each boost release.
3) fix  <boost/graph/leda_graph.hpp>

1) is possible, but not preferred
2) same as 1
3) preferred.

Any comments ?

Jürgen

- -- 
* Dipl.-Math. Jürgen Hunold  ! Institut für Verkehrswesen, Eisenbahnbau
* voice: ++49 511 762-2529   ! und -betrieb, Universität Hannover  
* fax  : ++49 511 762-3001   ! Appelstrasse 9a, D-30167 Hannover
* hunold_at_[hidden] ! www.ive.uni-hannover.de
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