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view: minor changes

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This commit is contained in:
Michele Caini
2021-07-03 00:23:25 +02:00
parent 987be01bd6
commit 4d09be0cd3
1 changed files with 17 additions and 30 deletions
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47
src/entt/entity/view.hpp
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@@ -114,6 +114,19 @@ private:
};
template<bool Enable>
struct stable_iteration {
template<typename Entity>
[[nodiscard]] static constexpr bool accept([[maybe_unused]] const Entity entity) ENTT_NOEXCEPT {
if constexpr(Enable) {
return entity != tombstone;
} else {
return true;
}
}
};
}
@@ -124,37 +137,11 @@ private:
/*! @brief Stable storage policy, aimed at pointer stability. */
struct stable_storage_policy {
/**
* @cond TURN_OFF_DOXYGEN
* Internal details not to be documented.
*/
template<typename Entity>
[[nodiscard]] static constexpr bool accept(const Entity entity) ENTT_NOEXCEPT {
return entity != tombstone;
}
/**
* Internal details not to be documented.
* @endcond
*/
};
using packed_storage_policy = internal::stable_iteration<false>;
/*! @brief Packed storage policy, aimed at faster linear iteration. */
struct packed_storage_policy {
/**
* @cond TURN_OFF_DOXYGEN
* Internal details not to be documented.
*/
template<typename Entity>
[[nodiscard]] static constexpr bool accept(const Entity) ENTT_NOEXCEPT {
return true;
}
/**
* Internal details not to be documented.
* @endcond
*/
};
using stable_storage_policy = internal::stable_iteration<true>;
/**
@@ -1014,10 +1001,10 @@ private:
*/
template<typename Entity, typename... Exclude, typename... Component>
struct basic_view<Entity, exclude_t<Exclude...>, Component...>
: basic_view_impl<std::conditional_t<std::disjunction_v<typename component_traits<std::remove_const_t<Component>>::in_place_delete...>, stable_storage_policy, packed_storage_policy>, Entity, exclude_t<Exclude...>, Component...>
: basic_view_impl<internal::stable_iteration<(in_place_delete_v<std::remove_const_t<Component>> || ...)>, Entity, exclude_t<Exclude...>, Component...>
{
/*! @brief Most restrictive storage policy of all component types. */
using storage_policy = std::conditional_t<std::disjunction_v<typename component_traits<std::remove_const_t<Component>>::in_place_delete...>, stable_storage_policy, packed_storage_policy>;
using storage_policy = internal::stable_iteration<(in_place_delete_v<std::remove_const_t<Component>> || ...)>;
using basic_view_impl<storage_policy, Entity, exclude_t<Exclude...>, Component...>::basic_view_impl;
};