BaseSetIterationView.h

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#pragma once
#include "BaseSet.h"
 
namespace catapult { namespace deltaset {
 
    template<typename TSetTraits>
    class BaseSetIterationView {
    private:
        using SetType = typename TSetTraits::MemorySetType;
        using KeyType = typename TSetTraits::KeyType;
 
    public:
        explicit BaseSetIterationView(const SetType& set) : m_set(set)
        {}
 
    public:
        auto findIterator(const KeyType& key) const {
            return m_set.find(key);
        }
 
    public:
        auto begin() const {
            return m_set.cbegin();
        }
 
        auto end() const {
            return m_set.cend();
        }
 
    private:
        const SetType& m_set;
    };
 
    template<typename TSet>
    bool IsSetIterable(const TSet&) {
        return true;
    }
 
    template<typename TSet>
    const TSet& SelectIterableSet(const TSet& set) {
        return set;
    }
 
    template<typename TElementTraits, typename TSetTraits, typename TCommitPolicy>
    bool IsBaseSetIterable(const BaseSet<TElementTraits, TSetTraits, TCommitPolicy>& set) {
        return IsSetIterable(set.m_elements);
    }
 
    template<typename TElementTraits, typename TSetTraits, typename TCommitPolicy>
    BaseSetIterationView<TSetTraits> MakeIterableView(const BaseSet<TElementTraits, TSetTraits, TCommitPolicy>& set) {
        return BaseSetIterationView<TSetTraits>(SelectIterableSet(set.m_elements));
    }
}}