MultiDimensional.fhh

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///
/// @file  MultiDimensional.fhh
/// @brief Forward declarations of types used in the tensor classes
///

//**** This file is a part of the HAMMER library
//**** Copyright (C) 2016 - 2020 The HAMMER Collaboration
//**** HAMMER is licensed under version 3 of the GPL; see COPYING for details
//**** Please note the MCnet academic guidelines; see GUIDELINES for details

// -*- C++ -*-
#ifndef HAMMER_MATH_MULTIDIMENSIONAL_FHH
#define HAMMER_MATH_MULTIDIMENSIONAL_FHH

#include <map>
#include <set>
#include <vector>
#include <memory>
#include <cstddef>

namespace Hammer {

    using IndexType = uint16_t; //Lots of space for integrator dimensions
    using IndexPair = std::pair<IndexType, IndexType>;
    using IndexList = std::vector<IndexType>;
    using UniqueIndexList = std::set<IndexType>;
    using IndexPairList = std::vector<IndexPair>;
    // using IndexBoolPairList = std::vector<std::pair<IndexType, bool>>;

    using PositionType = size_t;
    using PositionPair = std::pair<PositionType, PositionType>;
    using PositionList = std::vector<PositionType>;
    using PositionPairList = std::vector<PositionPair>;

    using PosIndexPair = std::pair<PositionType, IndexType>;
    using PosIndexPairList = std::vector<PosIndexPair>;

    enum IndexLabel : int;
    using LabelPair = std::pair<IndexLabel, IndexLabel>;
    using LabelsList = std::vector<IndexLabel>;
    using UniqueLabelsList = std::set<IndexLabel>;
    using LabelPairsSet = std::set<LabelPair>;

    namespace MultiDimensional {

        class IContainer;
        using TensorData = std::unique_ptr<IContainer>;
        using SharedTensorData = std::shared_ptr<IContainer>;
    }

} // namespace Hammer

#endif