Re: [Boost-users] BGL: std::map<Edge, int> needs the < operator

On 4/21/06, Dmitry Bufistov wrote:

Ovanes, In your implementation you need to change edge_descriptor class. Is it possible to do the same without such modification? I was trying define such global operator

but it doesn't work for me (when I try to instantinate some std::map for edge I have compilation error: 1>C:\Program Files\Microsoft Visual Studio 8\VC\include\functional(143) : error C2678: binary '<' : no operator found which takes a left-hand operand of type 'const edge_descriptor_t' (or there is no acceptable conversion)

Is your global operator in the same namespace as edge_descriptor_t? -Michael Fawcett