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/** \file
 * \brief Loose equality testing for NGHolder graphs.
 *
 * Loose equality check for holders' graph structure and vertex_index,
 * vertex_char_reach and (optionally reports).
 */

#ifndef NG_IS_EQUAL_H
#define NG_IS_EQUAL_H

#include "ue2common.h"

#include <memory>

namespace ue2 {

class NGHolder;

bool is_equal(const NGHolder &a, const NGHolder &b);
bool is_equal(const NGHolder &a, ReportID a_r, const NGHolder &b, ReportID b_r);

u64a hash_holder(const NGHolder &g);

// Util Functors
struct NGHolderHasher {
    size_t operator()(const std::shared_ptr<const NGHolder> &h) const {
        return hash_holder(*h);
    }
};

struct NGHolderEqual {
    bool operator()(const std::shared_ptr<const NGHolder> &a,
                    const std::shared_ptr<const NGHolder> &b) const {
        return is_equal(*a, *b);
    }
};

} // namespace ue2

#endif // NG_IS_EQUAL_H
