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40 lines
948 B
40 lines
948 B
#ifndef ENTT_CORE_FAMILY_HPP
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#define ENTT_CORE_FAMILY_HPP
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#include <type_traits>
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#include "../config/config.h"
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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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inline static maybe_atomic_t<ENTT_ID_TYPE> identifier;
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template<typename...>
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inline static const auto inner = identifier++;
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public:
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/*! @brief Unsigned integer type. */
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using family_type = ENTT_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 in place of family_type here
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inline static const family_type type = inner<std::decay_t<Type>...>;
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};
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}
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#endif // ENTT_CORE_FAMILY_HPP
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