ShortHash.h

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#pragma once
#include "BaseValue.h"
#include "catapult/types.h"
#include <unordered_set>
 
namespace catapult { namespace utils {
 
    struct ShortHash_tag {};
    using ShortHash = BaseValue<uint32_t, ShortHash_tag>;
 
    // Trivial hash function for ShortHash
    struct ShortHashHasher {
        size_t operator()(const ShortHash& shortHash) const {
            return shortHash.unwrap();
        }
    };
 
    // An unordered set of short hashes.
    using ShortHashesSet = std::unordered_set<ShortHash, ShortHashHasher>;
 
    inline ShortHash ToShortHash(const Hash256& hash) {
        return reinterpret_cast<const ShortHash&>(hash[0]);
    }
}}