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meta: share common code

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This commit is contained in:
Michele Caini
2022-09-07 16:17:29 +02:00
parent 8595e4bd99
commit ed0e3f4435
1 changed files with 52 additions and 57 deletions
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109
src/entt/meta/meta.hpp
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@@ -684,8 +684,38 @@ private:
node_type node;
};
/**
* @cond TURN_OFF_DOXYGEN
* Internal details not to be documented.
*/
namespace internal {
struct meta_prop_owner {
[[nodiscard]] auto prop(const std::shared_ptr<internal::meta_prop_map> &node) const noexcept {
using return_type = meta_range<meta_prop, typename decltype(internal::meta_prop_map::prop)::const_iterator>;
return node ? return_type{node->prop.cbegin(), node->prop.cend()} : return_type{};
}
[[nodiscard]] meta_prop prop(const std::shared_ptr<internal::meta_prop_map> &node, const id_type key) const {
if(!node) {
return {};
}
const auto it = node->prop.find(key);
return it != node->prop.cend() ? it->second : meta_prop{};
}
};
} // namespace internal
/**
* Internal details not to be documented.
* @endcond
*/
/*! @brief Opaque wrapper for data members. */
struct meta_data {
struct meta_data: private internal::meta_prop_owner {
/*! @brief Node type. */
using node_type = internal::meta_data_node;
/*! @brief Unsigned integer type. */
@@ -764,12 +794,8 @@ struct meta_data {
* @brief Returns a range to visit registered meta properties.
* @return An iterable range to visit registered meta properties.
*/
[[nodiscard]] meta_range<meta_prop, typename decltype(internal::meta_prop_map::prop)::const_iterator> prop() const noexcept {
if(node.details) {
return {node.details->prop.cbegin(), node.details->prop.cend()};
}
return {};
[[nodiscard]] auto prop() const noexcept {
return meta_prop_owner::prop(node.details);
}
/**
@@ -778,13 +804,7 @@ struct meta_data {
* @return The registered meta property for the given key, if any.
*/
[[nodiscard]] meta_prop prop(const id_type key) const {
if(node.details) {
if(auto it = node.details->prop.find(key); it != node.details->prop.cend()) {
return it->second;
}
}
return {};
return meta_prop_owner::prop(node.details, key);
}
/**
@@ -800,7 +820,7 @@ private:
};
/*! @brief Opaque wrapper for member functions. */
struct meta_func {
struct meta_func: private internal::meta_prop_owner {
/*! @brief Node type. */
using node_type = internal::meta_func_node;
/*! @brief Unsigned integer type. */
@@ -882,12 +902,8 @@ struct meta_func {
}
/*! @copydoc meta_data::prop */
[[nodiscard]] meta_range<meta_prop, typename decltype(internal::meta_prop_map::prop)::const_iterator> prop() const noexcept {
if(node.details) {
return {node.details->prop.cbegin(), node.details->prop.cend()};
}
return {};
[[nodiscard]] auto prop() const noexcept {
return meta_prop_owner::prop(node.details);
}
/**
@@ -896,13 +912,7 @@ struct meta_func {
* @return The registered meta property for the given key, if any.
*/
[[nodiscard]] meta_prop prop(const id_type key) const {
if(node.details) {
if(auto it = node.details->prop.find(key); it != node.details->prop.cend()) {
return it->second;
}
}
return {};
return meta_prop_owner::prop(node.details, key);
}
/**
@@ -926,7 +936,7 @@ private:
};
/*! @brief Opaque wrapper for types. */
class meta_type {
class meta_type: private internal::meta_prop_owner {
template<typename Func>
[[nodiscard]] auto lookup(meta_any *const args, const typename internal::meta_type_node::size_type sz, Func next) const {
using element_type = decltype(next());
@@ -1143,24 +1153,18 @@ public:
* @brief Returns a range to visit registered top-level base meta types.
* @return An iterable range to visit registered top-level base meta types.
*/
[[nodiscard]] meta_range<meta_type, typename decltype(internal::meta_type_descriptor::base)::const_iterator> base() const noexcept {
if(node.details) {
return {node.details->base.cbegin(), node.details->base.cend()};
}
return {};
[[nodiscard]] auto base() const noexcept {
using return_type = meta_range<meta_type, typename decltype(internal::meta_type_descriptor::base)::const_iterator>;
return node.details ? return_type{node.details->base.cbegin(), node.details->base.cend()} : return_type{};
}
/**
* @brief Returns a range to visit registered top-level meta data.
* @return An iterable range to visit registered top-level meta data.
*/
[[nodiscard]] meta_range<meta_data, typename decltype(internal::meta_type_descriptor::data)::const_iterator> data() const noexcept {
if(node.details) {
return {node.details->data.cbegin(), node.details->data.cend()};
}
return {};
[[nodiscard]] auto data() const noexcept {
using return_type = meta_range<meta_data, typename decltype(internal::meta_type_descriptor::data)::const_iterator>;
return node.details ? return_type{node.details->data.cbegin(), node.details->data.cend()} : return_type{};
}
/**
@@ -1191,12 +1195,9 @@ public:
* @brief Returns a range to visit registered top-level functions.
* @return An iterable range to visit registered top-level functions.
*/
[[nodiscard]] meta_range<meta_func, typename decltype(internal::meta_type_descriptor::func)::const_iterator> func() const noexcept {
if(node.details) {
return {node.details->func.cbegin(), node.details->func.cend()};
}
return {};
[[nodiscard]] auto func() const noexcept {
using return_type = meta_range<meta_func, typename decltype(internal::meta_type_descriptor::func)::const_iterator>;
return node.details ? return_type{node.details->func.cbegin(), node.details->func.cend()} : return_type{};
}
/**
@@ -1375,12 +1376,8 @@ public:
* @brief Returns a range to visit registered top-level meta properties.
* @return An iterable range to visit registered top-level meta properties.
*/
[[nodiscard]] meta_range<meta_prop, typename decltype(internal::meta_prop_map::prop)::const_iterator> prop() const noexcept {
if(node.details) {
return {node.details->prop.cbegin(), node.details->prop.cend()};
}
return {};
[[nodiscard]] auto prop() const noexcept {
return meta_prop_owner::prop(node.details);
}
/**
@@ -1392,10 +1389,8 @@ public:
* @return The registered meta property for the given key, if any.
*/
[[nodiscard]] meta_prop prop(const id_type key) const {
if(node.details) {
if(auto it = node.details->prop.find(key); it != node.details->prop.cend()) {
return it->second;
}
if(auto elem = meta_prop_owner::prop(node.details, key)) {
return elem;
}
for(auto &&curr: base()) {