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meta: context aware meta_arg_node function (with internal temporary trampoline)

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This commit is contained in:
Michele Caini
2022-10-05 11:44:07 +02:00
parent bc0233e34b
commit 6a8a9c4b31
2 changed files with 17 additions and 12 deletions
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27
src/entt/meta/node.hpp
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@@ -131,15 +131,25 @@ struct meta_type_node {
};
template<typename Type>
meta_type_node resolve() noexcept;
meta_type_node resolve(const meta_context &) noexcept;
template<typename Type>
[[nodiscard]] meta_type_node resolve_TODO() noexcept {
return resolve<Type>(meta_context::from(locator<meta_ctx>::value_or()));
}
template<typename... Args>
[[nodiscard]] auto meta_arg_node(type_list<Args...>, [[maybe_unused]] const std::size_t index) noexcept {
[[nodiscard]] auto meta_arg_node(type_list<Args...>, const meta_context &context, [[maybe_unused]] const std::size_t index) noexcept {
std::size_t pos{};
meta_type_node (*value)() noexcept = nullptr;
((value = (pos++ == index ? &resolve_TODO<std::remove_cv_t<std::remove_reference_t<Args>>> : value)), ...);
meta_type_node (*value)(const meta_context &) noexcept = nullptr;
((value = (pos++ == index ? &resolve<std::remove_cv_t<std::remove_reference_t<Args>>> : value)), ...);
ENTT_ASSERT(value != nullptr, "Out of bounds");
return value();
return value(context);
}
template<typename Args>
[[nodiscard]] auto meta_arg_node_TODO(Args, const std::size_t index) noexcept {
return meta_arg_node(Args{}, meta_context::from(locator<meta_ctx>::value_or()), index);
}
[[nodiscard]] inline const void *try_cast(const meta_type_node &from, const meta_type_node &to, const void *instance) noexcept {
@@ -163,11 +173,6 @@ template<typename... Args>
return it != context.value.end() ? &it->second : nullptr;
}
template<typename Type>
[[nodiscard]] meta_type_node resolve_TODO() noexcept {
return resolve<Type>(meta_context::from(locator<meta_ctx>::value_or()));
}
template<typename Type>
[[nodiscard]] meta_type_node resolve(const meta_context &context) noexcept {
static_assert(std::is_same_v<Type, std::remove_const_t<std::remove_reference_t<Type>>>, "Invalid type");
@@ -219,7 +224,7 @@ template<typename Type>
node.templ = meta_template_node{
meta_template_traits<Type>::args_type::size,
&resolve_TODO<typename meta_template_traits<Type>::class_type>,
+[](const std::size_t index) noexcept { return meta_arg_node(typename meta_template_traits<Type>::args_type{}, index); }};
+[](const std::size_t index) noexcept { return meta_arg_node_TODO(typename meta_template_traits<Type>::args_type{}, index); }};
}
return node;

2
src/entt/meta/utility.hpp
View File

@@ -176,7 +176,7 @@ meta_any meta_dispatch([[maybe_unused]] Type &&value) {
*/
template<typename Type>
[[nodiscard]] static meta_type meta_arg(const std::size_t index) noexcept {
return internal::meta_arg_node(Type{}, index);
return internal::meta_arg_node_TODO(Type{}, index);
}
/**