hash_code.hpp

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#pragma once
#include "collections/generic/helpers/hasher.hpp"
#include "object.hpp"
 
namespace xtd {
  class hash_code : public xtd::object {
  public:
    
    hash_code() = default;
    
    
    template<class type_t>
    hash_code& add(const type_t value) noexcept {
      hash_code_ = hash_combine(hash_code_, xtd::collections::generic::helpers::hasher<type_t> {}(value));
      return *this;
    }
    
    bool equals(const xtd::object& other) const noexcept override;
 
    xtd::size get_hash_code() const noexcept override;
 
    xtd::size to_hash_code() const noexcept;
 
    
    template<class ...args_t>
    static xtd::size combine(args_t... values) noexcept {return combine_iterator(generate_uniqueness_seed(), values...);}
 
  private:
    template<class type_t, class ...args_t>
    static xtd::size combine_iterator(xtd::size seed, type_t value, args_t... values) noexcept {return combine_iterator(hash_combine(seed, xtd::collections::generic::helpers::hasher<type_t> {}(value)), values...);}
    static xtd::size combine_iterator(xtd::size seed) noexcept;
    static xtd::size hash_combine(xtd::size seed, xtd::size value) noexcept;
    static xtd::size generate_uniqueness_seed() noexcept;
    
    xtd::size hash_code_ = generate_uniqueness_seed();
  };
}