Topology.h

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#ifndef TOPOLOGY_H
#define TOPOLOGY_H
 
#pragma once
 
#include <stdexcept>
#include <vector>
 
namespace galib {
 
    namespace internal {
        struct NodeLinks {
            std::vector<std::size_t> neighbors_out;
            std::vector<std::size_t> neighbors_in;
        };
    }
 
    class Topology {
    private:
        std::size_t num_nodes_m;
 
    protected:
        [[nodiscard]] std::size_t getNumNodes() const { return num_nodes_m; }
 
    public:
        virtual ~Topology() = default;
 
        explicit Topology(const std::size_t num_nodes) : num_nodes_m(num_nodes) {
            if (num_nodes < 2) {
                throw std::invalid_argument("Number of nodes must be greater than 1");
            }
        };
 
        [[nodiscard]] virtual internal::NodeLinks getLinks(std::size_t node) const = 0;
    };
 
}
 
#endif // TOPOLOGY_H