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entity: turn get_t, exclude_t and owned_t into proper classes (close #998)

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Michele Caini
2023-03-27 11:15:35 +02:00
parent 13295a14ee
commit 660bc5843e
1 changed files with 36 additions and 3 deletions
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39
src/entt/entity/fwd.hpp
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@@ -102,7 +102,7 @@ class basic_continuous_loader;
* @tparam Type List of types.
*/
template<typename... Type>
using exclude_t = type_list<Type...>;
struct exclude_t final: type_list<Type...> {};
/**
* @brief Variable template for exclusion lists.
@@ -116,7 +116,7 @@ inline constexpr exclude_t<Type...> exclude{};
* @tparam Type List of types.
*/
template<typename... Type>
using get_t = type_list<Type...>;
struct get_t final: type_list<Type...> {};
/**
* @brief Variable template for lists of observed components.
@@ -130,7 +130,7 @@ inline constexpr get_t<Type...> get{};
* @tparam Type List of types.
*/
template<typename... Type>
using owned_t = type_list<Type...>;
struct owned_t final: type_list<Type...> {};
/**
* @brief Variable template for lists of owned components.
@@ -139,6 +139,39 @@ using owned_t = type_list<Type...>;
template<typename... Type>
inline constexpr owned_t<Type...> owned{};
/**
* @brief Applies a given _function_ to a get list and generate a new list.
* @tparam Type Types provided by the get list.
* @tparam Op Unary operation as template class with a type member named `type`.
*/
template<typename... Type, template<typename...> class Op>
struct type_list_transform<get_t<Type...>, Op> {
/*! @brief Resulting get list after applying the transform function. */
using type = get_t<typename Op<Type>::type...>;
};
/**
* @brief Applies a given _function_ to an exclude list and generate a new list.
* @tparam Type Types provided by the exclude list.
* @tparam Op Unary operation as template class with a type member named `type`.
*/
template<typename... Type, template<typename...> class Op>
struct type_list_transform<exclude_t<Type...>, Op> {
/*! @brief Resulting exclude list after applying the transform function. */
using type = exclude_t<typename Op<Type>::type...>;
};
/**
* @brief Applies a given _function_ to an owned list and generate a new list.
* @tparam Type Types provided by the owned list.
* @tparam Op Unary operation as template class with a type member named `type`.
*/
template<typename... Type, template<typename...> class Op>
struct type_list_transform<owned_t<Type...>, Op> {
/*! @brief Resulting owned list after applying the transform function. */
using type = owned_t<typename Op<Type>::type...>;
};
/*! @brief Alias declaration for the most common use case. */
using sparse_set = basic_sparse_set<>;