Location.h

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#include <cstddef>
#include <iosfwd>
 
#pragma once
 
namespace MeshLib
{
 
enum class MeshItemType { Node, Edge, Face, Cell, IntegrationPoint };
 
static constexpr char const* mesh_item_type_strings[] = {
    "node", "edge", "face", "cell", "integration_point"};
 
static constexpr char const* toString(const MeshItemType t)
{
    return mesh_item_type_strings[static_cast<int>(t)];
}
 
std::ostream& operator<<(std::ostream& os, MeshItemType const& t);
 
struct Location
{
    std::size_t          mesh_id;
    MeshItemType         item_type;
    std::size_t          item_id;
 
    Location(std::size_t meshid, MeshItemType itemtype, std::size_t itemid)
    : mesh_id(meshid), item_type(itemtype), item_id(itemid){}
};
 
inline
bool operator<(const Location& left, const Location& right)
{
    if (left.mesh_id != right.mesh_id)
    {
        return left.mesh_id < right.mesh_id;
    }
    if (left.item_type != right.item_type)
    {
        return left.item_type < right.item_type;
    }
    return left.item_id < right.item_id;
}
 
 
std::ostream& operator<<(std::ostream& os, Location const& l);
 
}   // namespace MeshLib