KOKO\Mimi
29 lines
554 B
C++
29 lines
554 B
C++
#pragma once
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#include <compare>
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#include <cstdint>
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#include <stdexcept>
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namespace fesa {
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template <class Tag>
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class EntityId final {
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public:
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explicit constexpr EntityId(const std::int64_t value) : value_{value} {
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if (value < 0) {
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throw std::invalid_argument{"EntityId value must not be negative."};
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}
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}
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[[nodiscard]] constexpr std::int64_t value() const noexcept {
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return value_;
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}
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auto operator<=>(const EntityId&) const = default;
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private:
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std::int64_t value_;
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};
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} // namespace fesa
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