Scarfski/entt
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

meta: shrink function templates a bit

Browse Source
This commit is contained in:
Michele Caini
2022-09-12 09:40:41 +02:00
parent 6010dbc368
commit ffb9e4b0eb
1 changed files with 95 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

138
src/entt/meta/factory.hpp
View File

@@ -21,6 +21,66 @@
namespace entt {
/**
* @cond TURN_OFF_DOXYGEN
* Internal details not to be documented.
*/
namespace internal {
inline internal::meta_base_node &meta_extend(internal::meta_type_node &owner, const id_type id, internal::meta_base_node &node) {
return owner.details->base.insert_or_assign(id, std::move(node)).first->second;
}
inline internal::meta_conv_node &meta_extend(internal::meta_type_node &owner, const id_type id, internal::meta_conv_node &node) {
return owner.details->conv.insert_or_assign(id, std::move(node)).first->second;
}
inline internal::meta_ctor_node &meta_extend(internal::meta_type_node &owner, const id_type id, internal::meta_ctor_node &node) {
return owner.details->ctor.insert_or_assign(id, std::move(node)).first->second;
}
inline internal::meta_dtor_node &meta_extend(internal::meta_type_node &owner, internal::meta_dtor_node &node) {
return (owner.dtor = std::move(node));
}
inline internal::meta_data_node &meta_extend(internal::meta_type_node &owner, const id_type id, internal::meta_data_node &node) {
return owner.details->data.insert_or_assign(id, std::move(node)).first->second;
}
inline internal::meta_func_node &meta_extend(internal::meta_type_node &owner, const id_type id, internal::meta_func_node &node) {
if(auto it = owner.details->func.find(id); it != owner.details->func.end()) {
for(auto *curr = &it->second; curr; curr = curr->next.get()) {
if(curr->invoke == node.invoke) {
node.next = std::move(curr->next);
*curr = std::move(node);
return *curr;
}
}
// locally overloaded function
node.next = std::make_shared<internal::meta_func_node>(std::move(owner.details->func[id]));
}
return owner.details->func.insert_or_assign(id, std::move(node)).first->second;
}
template<typename Owner>
inline internal::meta_prop_node &meta_extend(Owner &owner, const id_type id, internal::meta_prop_node &node) {
if(!owner.details) {
owner.details = std::make_shared<typename decltype(owner.details)::element_type>();
}
return (owner.details->prop[id] = std::move(node));
}
} // namespace internal
/**
* Internal details not to be documented.
* @endcond
*/
/**
* @brief Meta factory to be used for reflection purposes.
*
@@ -45,7 +105,7 @@ public:
* @param target The node for which to store properties, if any.
*/
meta_factory(Node &target) noexcept
: node{&target} {}
: parent{&target} {}
/**
* @brief Assigns a property to the last meta object created.
@@ -53,29 +113,30 @@ public:
* Both the key and the value (if any) must be at least copy constructible.
*
* @tparam Value Optional type of the property value.
* @param key Property key.
* @param id Property key.
* @param value Optional property value.
* @return An extended meta factory for the given type.
*/
template<typename... Value>
meta_factory prop(id_type key, [[maybe_unused]] Value &&...value) {
if(!node->details) {
node->details = std::make_shared<typename decltype(node->details)::element_type>();
}
meta_factory prop(id_type id, [[maybe_unused]] Value &&...value) {
if constexpr(sizeof...(Value) == 0u) {
node->details->prop[key] = internal::meta_prop_node{&internal::resolve<void>};
internal::meta_prop_node node{
&internal::resolve<void>};
internal::meta_extend(*parent, id, std::move(node));
} else {
node->details->prop[key] = internal::meta_prop_node{
internal::meta_prop_node node{
&internal::resolve<std::decay_t<Value>>...,
std::make_shared<std::decay_t<Value>>(std::forward<Value>(value))...};
internal::meta_extend(*parent, id, std::move(node));
}
return *this;
}
private:
Node *node;
Node *parent;
};
/**
@@ -103,8 +164,8 @@ class meta_factory<Type> {
+[](meta_handle instance, meta_any value) -> bool { return (meta_setter<Type, value_list_element_v<Index, Setter>>(*instance.operator->(), value.as_ref()) || ...); },
&meta_getter<Type, Getter, Policy>};
auto it = owner().details->data.insert_or_assign(id, std::move(node)).first;
return meta_factory<Type, internal::meta_data_node>{it->second};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_data_node>{elem};
}
public:
@@ -139,7 +200,7 @@ public:
auto base() noexcept {
static_assert(!std::is_same_v<Type, Base> && std::is_base_of_v<Base, Type>, "Invalid base type");
owner().details->base[type_id<Base>().hash()] = internal::meta_base_node{
internal::meta_base_node node{
&internal::resolve<Base>,
+[](meta_any other) noexcept -> meta_any {
if(auto *ptr = other.data(); ptr) {
@@ -149,6 +210,7 @@ public:
return forward_as_meta(*static_cast<const Base *>(static_cast<const Type *>(std::as_const(other).data())));
}};
internal::meta_extend(owner(), type_id<Base>().hash(), std::move(node));
return *this;
}
@@ -168,11 +230,12 @@ public:
auto conv() noexcept {
using conv_type = std::remove_cv_t<std::remove_reference_t<std::invoke_result_t<decltype(Candidate), Type &>>>;
owner().details->conv[type_id<conv_type>().hash()] = internal::meta_conv_node{
internal::meta_conv_node node{
+[](const meta_any &instance) -> meta_any {
return forward_as_meta(std::invoke(Candidate, *static_cast<const Type *>(instance.data())));
}};
internal::meta_extend(owner(), type_id<conv_type>().hash(), std::move(node));
return *this;
}
@@ -189,11 +252,12 @@ public:
auto conv() noexcept {
using conv_type = std::remove_cv_t<std::remove_reference_t<To>>;
owner().details->conv[type_id<conv_type>().hash()] = internal::meta_conv_node{
internal::meta_conv_node node{
+[](const meta_any &instance) -> meta_any {
return forward_as_meta(static_cast<To>(*static_cast<const Type *>(instance.data())));
}};
internal::meta_extend(owner(), type_id<conv_type>().hash(), std::move(node));
return *this;
}
@@ -216,11 +280,12 @@ public:
static_assert(Policy::template value<typename descriptor::return_type>, "Invalid return type for the given policy");
static_assert(std::is_same_v<std::remove_cv_t<std::remove_reference_t<typename descriptor::return_type>>, Type>, "The function doesn't return an object of the required type");
owner().details->ctor[type_id<typename descriptor::args_type>().hash()] = internal::meta_ctor_node{
internal::meta_ctor_node node{
descriptor::args_type::size,
&meta_arg<typename descriptor::args_type>,
&meta_construct<Type, Candidate, Policy>};
internal::meta_extend(owner(), type_id<typename descriptor::args_type>().hash(), std::move(node));
return *this;
}
@@ -238,11 +303,12 @@ public:
auto ctor() noexcept {
using descriptor = meta_function_helper_t<Type, Type (*)(Args...)>;
owner().details->ctor[type_id<typename descriptor::args_type>().hash()] = internal::meta_ctor_node{
internal::meta_ctor_node node{
descriptor::args_type::size,
&meta_arg<typename descriptor::args_type>,
&meta_construct<Type, Args...>};
internal::meta_extend(owner(), type_id<typename descriptor::args_type>().hash(), std::move(node));
return *this;
}
@@ -267,7 +333,8 @@ public:
template<auto Func>
auto dtor() noexcept {
static_assert(std::is_invocable_v<decltype(Func), Type &>, "The function doesn't accept an object of the type provided");
owner().dtor.dtor = +[](void *instance) { std::invoke(Func, *static_cast<Type *>(instance)); };
internal::meta_dtor_node node{+[](void *instance) { std::invoke(Func, *static_cast<Type *>(instance)); }};
internal::meta_extend(owner(), std::move(node));
return *this;
}
@@ -298,8 +365,8 @@ public:
&meta_setter<Type, Data>,
&meta_getter<Type, Data, Policy>};
auto it = owner().details->data.insert_or_assign(id, std::move(node)).first;
return meta_factory<Type, internal::meta_data_node>{it->second};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_data_node>{elem};
} else {
using data_type = std::remove_reference_t<std::remove_pointer_t<decltype(Data)>>;
@@ -311,8 +378,8 @@ public:
&meta_setter<Type, Data>,
&meta_getter<Type, Data, Policy>};
auto it = owner().details->data.insert_or_assign(id, std::move(node)).first;
return meta_factory<Type, internal::meta_data_node>{it->second};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_data_node>{elem};
}
}
@@ -351,8 +418,8 @@ public:
&meta_setter<Type, Setter>,
&meta_getter<Type, Getter, Policy>};
auto it = owner().details->data.insert_or_assign(id, std::move(node)).first;
return meta_factory<Type, internal::meta_data_node>{it->second};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_data_node>{elem};
} else {
using args_type = typename meta_function_helper_t<Type, decltype(Setter)>::args_type;
@@ -365,8 +432,8 @@ public:
&meta_setter<Type, Setter>,
&meta_getter<Type, Getter, Policy>};
auto it = owner().details->data.insert_or_assign(id, std::move(node)).first;
return meta_factory<Type, internal::meta_data_node>{it->second};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_data_node>{elem};
}
}
@@ -409,7 +476,6 @@ public:
auto func(const id_type id) noexcept {
using descriptor = meta_function_helper_t<Type, decltype(Candidate)>;
static_assert(Policy::template value<typename descriptor::return_type>, "Invalid return type for the given policy");
auto &&elem = owner();
internal::meta_func_node node{
(descriptor::is_const ? internal::meta_traits::is_const : internal::meta_traits::is_none) | (descriptor::is_static ? internal::meta_traits::is_static : internal::meta_traits::is_none),
@@ -418,22 +484,8 @@ public:
&meta_arg<typename descriptor::args_type>,
&meta_invoke<Type, Candidate, Policy>};
if(auto it = elem.details->func.find(id); it != elem.details->func.end()) {
for(auto *curr = &it->second; curr; curr = curr->next.get()) {
if(curr->invoke == node.invoke) {
node.next = std::move(curr->next);
*curr = std::move(node);
return meta_factory<Type, internal::meta_func_node>{*curr};
}
}
// locally overloaded function
node.next = std::make_shared<internal::meta_func_node>(std::move(elem.details->func[id]));
}
elem.details->func.insert_or_assign(id, std::move(node));
return meta_factory<Type, internal::meta_func_node>{elem.details->func[id]};
auto &&elem = internal::meta_extend(owner(), id, std::move(node));
return meta_factory<Type, internal::meta_func_node>{elem};
}
};