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view: refine ::storage function

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This commit is contained in:
Michele Caini
2023-04-28 16:24:38 +02:00
parent 88a1b8d0df
commit 4a3ee042ea
1 changed files with 19 additions and 23 deletions
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42
src/entt/entity/view.hpp
View File

@@ -309,8 +309,8 @@ public:
template<std::size_t Index>
void use() noexcept {
if(view) {
view = std::get<Index>(pools);
}
view = std::get<Index>(pools);
}
}
/*! @brief Updates the internal leading view if required. */
@@ -371,15 +371,11 @@ public:
template<std::size_t Index, typename Type>
void storage(Type &elem) noexcept {
if constexpr(Index < offset) {
view = (std::get<Index>(pools) == view ? nullptr : view);
std::get<Index>(pools) = &elem;
view ? unchecked_refresh() : refresh();
} else {
std::get<Index - offset>(filter) = &elem;
}
if(view == nullptr && std::apply([](const auto *...curr) { return ((curr != nullptr) && ...); }, pools)) {
refresh();
}
}
/**
@@ -432,10 +428,10 @@ public:
*/
[[nodiscard]] entity_type back() const noexcept {
if(view) {
auto it = view->rbegin();
for(const auto last = view->rend(); it != last && !contains(*it); ++it) {}
return it == view->rend() ? null : *it;
}
auto it = view->rbegin();
for(const auto last = view->rend(); it != last && !contains(*it); ++it) {}
return it == view->rend() ? null : *it;
}
return null;
}
@@ -863,21 +859,21 @@ public:
template<typename Func>
void each(Func func) const {
if(view) {
if constexpr(is_applicable_v<Func, decltype(*each().begin())>) {
for(const auto pack: each()) {
std::apply(func, pack);
}
} else if constexpr(Get::traits_type::page_size == 0u) {
for(size_type pos{}, last = size(); pos < last; ++pos) {
func();
}
} else {
for(auto &&component: *std::get<0>(pools)) {
func(component);
if constexpr(is_applicable_v<Func, decltype(*each().begin())>) {
for(const auto pack: each()) {
std::apply(func, pack);
}
} else if constexpr(Get::traits_type::page_size == 0u) {
for(size_type pos{}, last = size(); pos < last; ++pos) {
func();
}
} else {
for(auto &&component: *std::get<0>(pools)) {
func(component);
}
}
}
}
}
/**
* @brief Returns an iterable object to use to _visit_ a view.