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36 lines
888 B
C++
36 lines
888 B
C++
#ifndef ENTT_CORE_FAMILY_HPP
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#define ENTT_CORE_FAMILY_HPP
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#include "../config/config.h"
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#include "fwd.hpp"
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namespace entt {
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/**
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* @brief Dynamic identifier generator.
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*
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* Utility class template that can be used to assign unique identifiers to types
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* at runtime. Use different specializations to create separate sets of
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* identifiers.
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*/
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template<typename...>
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class family {
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static auto identifier() noexcept {
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static ENTT_MAYBE_ATOMIC(id_type) value{};
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return value++;
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}
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public:
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/*! @brief Unsigned integer type. */
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using value_type = id_type;
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/*! @brief Statically generated unique identifier for the given type. */
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template<typename... Type>
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// at the time I'm writing, clang crashes during compilation if auto is used instead of value_type
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inline static const value_type value = identifier();
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};
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} // namespace entt
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#endif
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