empty_path.hpp

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#ifndef GENERATOR_EMPTYPATH_HPP
#define GENERATOR_EMPTYPATH_HPP
 
#include "edge.hpp"
#include "iterator.hpp"
#include "path_vertex.hpp"
 
namespace generator
{
 
class empty_path_t
{
public:
    class edges_t
    {
    public:
        edge_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        edges_t();
 
        friend class empty_path_t;
    };
 
    class vertices_t
    {
    public:
        path_vertex_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        vertices_t();
 
        friend class empty_path_t;
    };
 
    empty_path_t();
 
    edges_t edges() const noexcept;
 
    vertices_t vertices() const noexcept;
};
} // namespace generator
 
#endif