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meta: further reduce the number of instantiations

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This commit is contained in:
Michele Caini
2022-09-07 14:32:15 +02:00
parent dac4ae94c0
commit ac6e9cf2f0
1 changed files with 30 additions and 64 deletions
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94
src/entt/meta/node.hpp
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@@ -143,95 +143,61 @@ template<typename... Args>
}
template<typename Type>
[[nodiscard]] auto *meta_default_constructor() noexcept {
[[nodiscard]] meta_type_node resolve() noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
auto &&context = meta_context::from(locator<meta_ctx>::value_or());
if(auto it = context.value.find(type_id<Type>().hash()); it != context.value.end()) {
return it->second;
}
meta_type_node node{
&type_id<Type>(),
type_id<Type>().hash(),
(std::is_arithmetic_v<Type> ? internal::meta_traits::is_arithmetic : internal::meta_traits::is_none)
| (std::is_integral_v<Type> ? internal::meta_traits::is_integral : internal::meta_traits::is_none)
| (std::is_signed_v<Type> ? internal::meta_traits::is_signed : internal::meta_traits::is_none)
| (std::is_array_v<Type> ? internal::meta_traits::is_array : internal::meta_traits::is_none)
| (std::is_enum_v<Type> ? internal::meta_traits::is_enum : internal::meta_traits::is_none)
| (std::is_class_v<Type> ? internal::meta_traits::is_class : internal::meta_traits::is_none)
| (is_meta_pointer_like_v<Type> ? internal::meta_traits::is_meta_pointer_like : internal::meta_traits::is_none)
| (is_complete_v<meta_sequence_container_traits<Type>> ? internal::meta_traits::is_meta_sequence_container : internal::meta_traits::is_none)
| (is_complete_v<meta_associative_container_traits<Type>> ? internal::meta_traits::is_meta_associative_container : internal::meta_traits::is_none),
size_of_v<Type>,
&resolve<std::remove_cv_t<std::remove_pointer_t<Type>>>};
if constexpr(std::is_default_constructible_v<Type>) {
return +[]() { return meta_any{std::in_place_type<Type>}; };
} else {
return static_cast<std::decay_t<decltype(meta_type_node::default_constructor)>>(nullptr);
node.default_constructor = +[]() { return meta_any{std::in_place_type<Type>}; };
}
}
template<typename Type>
[[nodiscard]] auto *meta_conversion_helper() noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
if constexpr(std::is_arithmetic_v<Type>) {
return +[](void *bin, const void *value) {
node.conversion_helper = +[](void *bin, const void *value) {
return bin ? static_cast<double>(*static_cast<Type *>(bin) = static_cast<Type>(*static_cast<const double *>(value))) : static_cast<double>(*static_cast<const Type *>(value));
};
} else if constexpr(std::is_enum_v<Type>) {
return +[](void *bin, const void *value) {
node.conversion_helper = +[](void *bin, const void *value) {
return bin ? static_cast<double>(*static_cast<Type *>(bin) = static_cast<Type>(static_cast<std::underlying_type_t<Type>>(*static_cast<const double *>(value)))) : static_cast<double>(*static_cast<const Type *>(value));
};
} else {
return static_cast<std::decay_t<decltype(meta_type_node::conversion_helper)>>(nullptr);
}
}
template<typename Type>
[[nodiscard]] auto *meta_from_void() noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
if constexpr(std::is_same_v<Type, void> || std::is_function_v<Type>) {
return static_cast<std::decay_t<decltype(meta_type_node::from_void)>>(nullptr);
} else {
return +[](void *element, const void *as_const) {
using value_type = std::decay_t<Type>;
if constexpr(!std::is_same_v<Type, void> && !std::is_function_v<Type>) {
node.from_void = +[](void *element, const void *as_const) {
if(element) {
return meta_any{std::in_place_type<value_type &>, *static_cast<value_type *>(element)};
return meta_any{std::in_place_type<std::decay_t<Type> &>, *static_cast<std::decay_t<Type> *>(element)};
}
return meta_any{std::in_place_type<const value_type &>, *static_cast<const value_type *>(as_const)};
return meta_any{std::in_place_type<const std::decay_t<Type> &>, *static_cast<const std::decay_t<Type> *>(as_const)};
};
}
}
template<typename Type>
[[nodiscard]] auto meta_template_info() noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
if constexpr(is_complete_v<meta_template_traits<Type>>) {
return meta_template_node{
node.templ = meta_template_node{
meta_template_traits<Type>::args_type::size,
&resolve<typename meta_template_traits<Type>::class_type>,
+[](const std::size_t index) noexcept -> meta_type_node { return meta_arg_node(typename meta_template_traits<Type>::args_type{}, index); }};
} else {
return meta_template_node{};
}
}
template<typename Type>
[[nodiscard]] meta_type_node resolve() noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
auto &&context = meta_context::from(locator<meta_ctx>::value_or());
auto it = context.value.find(type_id<Type>().hash());
if(it == context.value.end()) {
return meta_type_node{
&type_id<Type>(),
type_id<Type>().hash(),
(std::is_arithmetic_v<Type> ? internal::meta_traits::is_arithmetic : internal::meta_traits::is_none)
| (std::is_integral_v<Type> ? internal::meta_traits::is_integral : internal::meta_traits::is_none)
| (std::is_signed_v<Type> ? internal::meta_traits::is_signed : internal::meta_traits::is_none)
| (std::is_array_v<Type> ? internal::meta_traits::is_array : internal::meta_traits::is_none)
| (std::is_enum_v<Type> ? internal::meta_traits::is_enum : internal::meta_traits::is_none)
| (std::is_class_v<Type> ? internal::meta_traits::is_class : internal::meta_traits::is_none)
| (is_meta_pointer_like_v<Type> ? internal::meta_traits::is_meta_pointer_like : internal::meta_traits::is_none)
| (is_complete_v<meta_sequence_container_traits<Type>> ? internal::meta_traits::is_meta_sequence_container : internal::meta_traits::is_none)
| (is_complete_v<meta_associative_container_traits<Type>> ? internal::meta_traits::is_meta_associative_container : internal::meta_traits::is_none),
size_of_v<Type>,
&resolve<std::remove_cv_t<std::remove_pointer_t<Type>>>,
meta_default_constructor<Type>(),
meta_conversion_helper<Type>(),
meta_from_void<Type>(),
meta_template_info<Type>()};
}
return it->second;
return node;
}
} // namespace internal