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//
//
// Copyright (C) 2020 Schrödinger, LLC
//
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
///
/// Utilities to handle atomic numbers in Mancude (maximum number
/// of noncumulative double bonds) rings
///
/// This guarantees that aromatic rings containing heteroatoms
/// are always resolved in the same way
///
#pragma once
#include <vector>
#include <boost/rational.hpp>
namespace RDKit {
namespace CIPLabeler {
class CIPMol;
enum class Type {
Cv4D3, // =C(X)-
Nv3D2, // =N-
Nv4D3Plus, // =[N+]<
Nv2D2Minus, // -[N-]-
Cv3D3Minus, // -[C(X)-]-
Ov3D2Plus, // -[O+]=
Other
};
/**
* Calculate fractional atomic numbers for all atoms in the mol.
* Using fractional atomic numbers makes sure that atoms in rings
* that have resonant structures are always considered with the same
* priority.
*
*/
std::vector<boost::rational<int>> calcFracAtomNums(const CIPMol &mol);
} // namespace CIPLabeler
} // namespace RDKit
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