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种太阳的热带美短
2026-08-08 21:21:23 +08:00
parent a6d6f8c6d3
commit c51c9d2937
24 changed files with 359 additions and 56 deletions
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core/include/structive/property/descriptor.hpp
+16 -2
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@@ -43,6 +43,7 @@ struct Property_Descriptor {
static constexpr bool writable = Accessor::writable && (intrinsic_capability == Property_Capability::write || intrinsic_capability == Property_Capability::read_write);
static constexpr bool synchronized_view_read = Accessor::synchronized_view_read;
static constexpr bool trusted_object_access = Accessor::trusted_object_access;
static constexpr bool runtime_copy_writable = writable && requires(const Accessor& accessor, object_type& object, const value_type& candidate) { accessor.write(object, candidate); };
static_assert(unique_single_value_categories<Attributes...>());
static_assert(!((intrinsic_capability == Property_Capability::read || intrinsic_capability == Property_Capability::read_write) && !Accessor::readable), "property capability requests read from a non-readable accessor");
static_assert(!((intrinsic_capability == Property_Capability::write || intrinsic_capability == Property_Capability::read_write) && !Accessor::writable), "property capability requests write from a non-writable accessor");
@@ -55,9 +56,11 @@ struct Property_Descriptor {
template <class Category>
using attribute_type = find_attribute_in_list_t<Category, attribute_types>;
template <class Category>
static constexpr bool has_attribute = !std::same_as<attribute_type<Category>, void>;
static constexpr std::size_t attribute_count = count_attribute_category<Category, Attributes...>();
template <class Category>
constexpr decltype(auto) attribute() const requires has_attribute<Category> {
static constexpr bool has_attribute = attribute_count<Category> != 0;
template <class Category>
constexpr decltype(auto) attribute() const requires (attribute_count<Category> == 1) {
using target = attribute_type<Category>;
return std::get<target>(attributes);
}
@@ -70,6 +73,17 @@ struct Property_Descriptor {
(function(values), ...);
}, attributes);
}
template <class Category, class Function>
constexpr void for_each_attribute(Function&& function) const {
std::apply([&](const auto&... values) {
([&] {
using type = std::remove_cvref_t<decltype(values)>;
if constexpr (std::same_as<attribute_category_of_t<type>, Category>) {
function(values);
}
}(), ...);
}, attributes);
}
template <class Function>
constexpr void for_each_constraint(Function&& function) const {
std::apply([&](const auto&... values) {