Linking with BGL adjacency_list_io.hpp

From: Solomon Gibbs (solomon.gibbs_at_[hidden])
Date: 2003-07-29 12:39:18

Hi, 

I'm having trouble linking code that uses adjacency_list_io.hpp. 

If the header is included is included in more than one compilation unit, I 
get "multiple definition of function" errors for the non-template functions 
in adjacency_list_io.hpp:

std::istream& operator >> ( std::istream& in, no_property& ) and
void getSubset( no_property& p, const no_property& s )

I'm sure that there is some C+ subtlety that I'm missing here, but I'm not 
familiar enough with the library to understand what it is. Shouldn't 
non-template function code be in a .cpp file to keep this sort of thing from 
happening?

- Solomon