50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
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#pragma once
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#include <cstdint>
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#include <functional>
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namespace vanetza
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{
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namespace geodesy
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{
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/**
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* Standard country or area codes for statistical use by M49 standard.
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* \see https://unstats.un.org/unsd/methodology/m49/
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*/
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class M49Code
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{
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public:
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explicit constexpr M49Code(uint16_t value) : m_value(value) {}
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constexpr uint16_t value() const { return m_value; }
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bool operator==(M49Code other) const { return m_value == other.m_value; }
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bool operator!=(M49Code other) const { return m_value != other.m_value; }
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private:
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uint16_t m_value;
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};
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} // namespace geodesy
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} // namespace vanetza
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namespace std
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{
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template<>
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struct hash<vanetza::geodesy::M49Code>
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{
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std::size_t operator()(vanetza::geodesy::M49Code code) const
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{
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return std::hash<uint16_t>{}(code.value());
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}
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};
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template<>
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struct less<vanetza::geodesy::M49Code>
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{
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bool operator()(vanetza::geodesy::M49Code a, vanetza::geodesy::M49Code b) const
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{
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return a.value() < b.value();
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}
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};
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} // namespace std
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