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reflect class template argument values

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BlackMATov
2024-01-26 01:21:56 +07:00
parent a71069a894
commit 95181bf521
5 changed files with 499 additions and 17 deletions
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217
develop/untests/meta_issues/random_issue_6.cpp Normal file
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@@ -0,0 +1,217 @@
/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/meta.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2021-2024, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#include <meta.hpp/meta_all.hpp>
#include <doctest/doctest.h>
namespace
{
template < auto v0 >
struct v {};
template < typename t0 >
struct t {};
template < auto v1, auto v0 >
struct vv {};
template < auto v0, typename t0 >
struct vt {};
template < typename t0, auto v0 >
struct tv {};
template < typename t1, typename t0 >
struct tt {};
template < auto v2, auto v1, auto v0 >
struct vvv {};
template < auto v1, auto v0, typename t0 >
struct vvt {};
template < auto v1, typename t0, auto v0 >
struct vtv {};
template < auto v0, typename t1, typename t0 >
struct vtt {};
template < typename t0, auto v1, auto v0 >
struct tvv {};
template < typename t1, auto v0, typename t0 >
struct tvt {};
template < typename t1, typename t0, auto v0 >
struct ttv {};
template < typename t2, typename t1, typename t0 >
struct ttt {};
template < auto v2, auto v1, auto v0, typename t0, typename t1 >
struct vvvtt {};
template < typename t2, typename t1, typename t0, auto v0, auto v1 >
struct tttvv {};
}
TEST_CASE("meta/meta_issues/random/6") {
namespace meta = meta_hpp;
{
meta::class_type type = meta::resolve_type<v<42>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>()});
CHECK(type.get_argument_value(0).is<int>());
}
{
meta::class_type type = meta::resolve_type<t<int>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>()});
CHECK_FALSE(type.get_argument_value(0));
}
//
{
meta::class_type type = meta::resolve_type<vv<42, 21u>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>(),
meta::resolve_type<unsigned>()});
CHECK(type.get_argument_value(0).is<int>());
CHECK(type.get_argument_value(1).is<unsigned>());
}
{
meta::class_type type = meta::resolve_type<vt<42, unsigned>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>(),
meta::resolve_type<unsigned>()});
CHECK(type.get_argument_value(0).is<int>());
CHECK_FALSE(type.get_argument_value(1).has_value());
}
{
meta::class_type type = meta::resolve_type<tv<int, 42u>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>(),
meta::resolve_type<unsigned>()});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK(type.get_argument_value(1).is<unsigned>());
}
{
meta::class_type type = meta::resolve_type<tt<int, unsigned>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>(),
meta::resolve_type<unsigned>()});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK_FALSE(type.get_argument_value(1).has_value());
}
//
{
meta::class_type type = meta::resolve_type<vvv<std::int32_t{42}, std::uint32_t{21}, std::int64_t{10}>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<std::int32_t>(),
meta::resolve_type<std::uint32_t>(),
meta::resolve_type<std::int64_t>(),
});
CHECK(type.get_argument_value(0).as<std::int32_t>() == 42);
CHECK(type.get_argument_value(1).as<std::uint32_t>() == 21);
CHECK(type.get_argument_value(2).as<std::int64_t>() == 10);
}
{
meta::class_type type = meta::resolve_type<vvt<std::int32_t{42}, std::uint32_t{21}, float>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<std::int32_t>(),
meta::resolve_type<std::uint32_t>(),
meta::resolve_type<float>(),
});
CHECK(type.get_argument_value(0).as<std::int32_t>() == 42);
CHECK(type.get_argument_value(1).as<std::uint32_t>() == 21);
CHECK_FALSE(type.get_argument_value(2).has_value());
}
{
meta::class_type type = meta::resolve_type<vtv<std::int32_t{42}, float, std::uint32_t{21}>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<std::int32_t>(),
meta::resolve_type<float>(),
meta::resolve_type<std::uint32_t>(),
});
CHECK(type.get_argument_value(0).as<std::int32_t>() == 42);
CHECK_FALSE(type.get_argument_value(1).has_value());
CHECK(type.get_argument_value(2).as<std::uint32_t>() == 21);
}
{
meta::class_type type = meta::resolve_type<vtt<std::int32_t{42}, float, double>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<std::int32_t>(),
meta::resolve_type<float>(),
meta::resolve_type<double>(),
});
CHECK(type.get_argument_value(0).as<std::int32_t>() == 42);
CHECK_FALSE(type.get_argument_value(1).has_value());
CHECK_FALSE(type.get_argument_value(2).has_value());
}
{
meta::class_type type = meta::resolve_type<tvv<float, std::int32_t{42}, std::uint32_t{21}>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<float>(),
meta::resolve_type<std::int32_t>(),
meta::resolve_type<std::uint32_t>(),
});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK(type.get_argument_value(1).as<std::int32_t>() == 42);
CHECK(type.get_argument_value(2).as<std::uint32_t>() == 21);
}
{
meta::class_type type = meta::resolve_type<tvt<float, std::int32_t{42}, double>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<float>(),
meta::resolve_type<std::int32_t>(),
meta::resolve_type<double>(),
});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK(type.get_argument_value(1).as<std::int32_t>() == 42);
CHECK_FALSE(type.get_argument_value(2).has_value());
}
{
meta::class_type type = meta::resolve_type<ttv<float, double, std::int32_t{42}>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<float>(),
meta::resolve_type<double>(),
meta::resolve_type<std::int32_t>(),
});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK_FALSE(type.get_argument_value(1).has_value());
CHECK(type.get_argument_value(2).as<std::int32_t>() == 42);
}
{
meta::class_type type = meta::resolve_type<ttt<int, float, double>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<int>(),
meta::resolve_type<float>(),
meta::resolve_type<double>(),
});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK_FALSE(type.get_argument_value(1).has_value());
CHECK_FALSE(type.get_argument_value(2).has_value());
}
//
{
meta::class_type type = meta::resolve_type<vvvtt<std::int32_t{42}, std::uint32_t{21}, std::uint64_t{10}, float, double>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<std::int32_t>(),
meta::resolve_type<std::uint32_t>(),
meta::resolve_type<std::uint64_t>(),
meta::resolve_type<float>(),
meta::resolve_type<double>(),
});
CHECK(type.get_argument_value(0).as<std::int32_t>() == 42);
CHECK(type.get_argument_value(1).as<std::uint32_t>() == 21);
CHECK(type.get_argument_value(2).as<std::uint64_t>() == 10);
CHECK_FALSE(type.get_argument_value(3).has_value());
CHECK_FALSE(type.get_argument_value(4).has_value());
}
{
meta::class_type type = meta::resolve_type<tttvv<float, double, long double, std::int32_t{42}, std::uint32_t{21}>>();
CHECK(type.get_argument_types() == meta::any_type_list{
meta::resolve_type<float>(),
meta::resolve_type<double>(),
meta::resolve_type<long double>(),
meta::resolve_type<std::int32_t>(),
meta::resolve_type<std::uint32_t>(),
});
CHECK_FALSE(type.get_argument_value(0).has_value());
CHECK_FALSE(type.get_argument_value(1).has_value());
CHECK_FALSE(type.get_argument_value(2).has_value());
CHECK(type.get_argument_value(3).as<std::int32_t>() == 42);
CHECK(type.get_argument_value(4).as<std::uint32_t>() == 21);
}
}

1
headers/meta.hpp/meta_base.hpp
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@@ -204,6 +204,7 @@ namespace meta_hpp
using metadata_map = std::map<std::string, uvalue, std::less<>>;
using typedef_map = std::map<std::string, any_type, std::less<>>;
using uvalue_list = std::vector<uvalue>;
using any_type_list = std::vector<any_type>;
using class_list = std::vector<class_type>;

245
headers/meta.hpp/meta_detail/type_traits/class_traits.hpp
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@@ -27,33 +27,242 @@ namespace meta_hpp::detail
namespace impl
{
template < class_kind Class >
struct class_traits_impl {
static constexpr std::size_t arity{0};
struct class_argument_traits_impl {
using argument_types = type_list<>;
[[nodiscard]] static constexpr class_bitflags make_flags() noexcept {
return {};
}
static constexpr std::tuple argument_values{};
};
template < template < typename... > typename Class, typename... Args >
struct class_traits_impl<Class<Args...>> {
static constexpr std::size_t arity{sizeof...(Args)};
template < typename T >
inline constexpr decltype(std::ignore) type_to_ignore_v = std::ignore;
using argument_types = type_list<Args...>;
//
// typename...
//
[[nodiscard]] static constexpr class_bitflags make_flags() noexcept {
return class_flags::is_template_instantiation;
}
template < //
template < typename... >
typename Class,
typename... Ts >
struct class_argument_traits_impl<Class<Ts...>> {
using argument_types = type_list<Ts...>;
static constexpr std::tuple argument_values = std::make_tuple(type_to_ignore_v<Ts>...);
};
//
// auto, typename...
//
template < //
template < auto, typename... >
typename Class,
auto A,
typename... Zs >
struct class_argument_traits_impl<Class<A, Zs...>> {
using argument_types = type_list<decltype(A), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(A, type_to_ignore_v<Zs>...);
};
//
// auto, auto, typename...
// typename, auto, typename...
//
template < //
template < auto, auto, typename... >
typename Class,
auto A,
auto B,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, Zs...>> {
using argument_types = type_list<decltype(A), decltype(B), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(A, B, type_to_ignore_v<Zs>...);
};
template < //
template < typename, auto, typename... >
typename Class,
typename A,
auto B,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, Zs...>> {
using argument_types = type_list<A, decltype(B), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, B, type_to_ignore_v<Zs>...);
};
//
// auto, auto, auto, typename...
// typename, auto, auto, typename...
// auto, typename, auto, typename...
// typename, typename, auto, typename...
//
template < //
template < auto, auto, auto, typename... >
typename Class,
auto A,
auto B,
auto C,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<decltype(A), decltype(B), decltype(C), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(A, B, C, type_to_ignore_v<Zs>...);
};
template < //
template < typename, auto, auto, typename... >
typename Class,
typename A,
auto B,
auto C,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<A, decltype(B), decltype(C), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, B, C, type_to_ignore_v<Zs>...);
};
template < //
template < auto, typename, auto, typename... >
typename Class,
auto A,
typename B,
auto C,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<decltype(A), B, decltype(C), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(A, std::ignore, C, type_to_ignore_v<Zs>...);
};
template < //
template < typename, typename, auto, typename... >
typename Class,
typename A,
typename B,
auto C,
typename... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<A, B, decltype(C), Zs...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, std::ignore, C, type_to_ignore_v<Zs>...);
};
//
// auto...
//
template < //
template < auto... >
typename Class,
auto... Zs >
struct class_argument_traits_impl<Class<Zs...>> {
using argument_types = type_list<decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(Zs...);
};
//
// typename, auto...
//
template < //
template < typename, auto... >
typename Class,
typename A,
auto... Zs >
struct class_argument_traits_impl<Class<A, Zs...>> {
using argument_types = type_list<A, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, Zs...);
};
//
// auto, typename, auto...
// typename, typename, auto...
//
template < //
template < auto, typename, auto... >
typename Class,
auto A,
typename B,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, Zs...>> {
using argument_types = type_list<decltype(A), B, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(A, std::ignore, Zs...);
};
template < //
template < typename, typename, auto... >
typename Class,
typename A,
typename B,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, Zs...>> {
using argument_types = type_list<A, B, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, std::ignore, Zs...);
};
//
// auto, auto, typename, auto...
// typename, auto, typename, auto...
// auto, typename, typename, auto...
// typename, typename, typename, auto...
//
template < //
template < auto, auto, typename, auto... >
typename Class,
auto A,
auto B,
typename C,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<decltype(A), decltype(B), C, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(A, B, std::ignore, Zs...);
};
template < //
template < typename, auto, typename, auto... >
typename Class,
typename A,
auto B,
typename C,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<A, decltype(B), C, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, B, std::ignore, Zs...);
};
template < //
template < auto, typename, typename, auto... >
typename Class,
auto A,
typename B,
typename C,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<decltype(A), B, C, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(A, std::ignore, std::ignore, Zs...);
};
template < //
template < typename, typename, typename, auto... >
typename Class,
typename A,
typename B,
typename C,
auto... Zs >
struct class_argument_traits_impl<Class<A, B, C, Zs...>> {
using argument_types = type_list<A, B, C, decltype(Zs)...>;
static constexpr std::tuple argument_values = std::make_tuple(std::ignore, std::ignore, std::ignore, Zs...);
};
}
template < class_kind Class >
struct class_traits : impl::class_traits_impl<Class> {
struct class_traits {
static constexpr std::size_t size{sizeof(Class)};
static constexpr std::size_t align{alignof(Class)};
using argument_types = impl::class_argument_traits_impl<Class>::argument_types;
static constexpr std::tuple argument_values = impl::class_argument_traits_impl<Class>::argument_values;
static_assert(type_list_arity_v<argument_types> == std::tuple_size_v<decltype(argument_values)>);
[[nodiscard]] static constexpr class_bitflags make_flags() noexcept {
class_bitflags flags{};
@@ -73,7 +282,11 @@ namespace meta_hpp::detail
flags.set(class_flags::is_polymorphic);
}
return flags | impl::class_traits_impl<Class>::make_flags();
if constexpr ( type_list_arity_v<argument_types> ) {
flags.set(class_flags::is_template_instantiation);
}
return flags;
}
};
}

3
headers/meta.hpp/meta_types.hpp
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@@ -208,7 +208,9 @@ namespace meta_hpp
[[nodiscard]] std::size_t get_arity() const noexcept;
[[nodiscard]] any_type get_argument_type(std::size_t position) const noexcept;
[[nodiscard]] const uvalue& get_argument_value(std::size_t position) const noexcept;
[[nodiscard]] const any_type_list& get_argument_types() const noexcept;
[[nodiscard]] const uvalue_list& get_argument_values() const noexcept;
[[nodiscard]] const class_list& get_base_classes() const noexcept;
[[nodiscard]] const constructor_list& get_constructors() const noexcept;
@@ -492,6 +494,7 @@ namespace meta_hpp::detail
const std::size_t size;
const std::size_t align;
const any_type_list argument_types;
const uvalue_list argument_values;
// NOLINTEND(*-avoid-const-or-ref-data-members)
class_list base_classes;

50
headers/meta.hpp/meta_types/class_type.hpp
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@@ -60,6 +60,45 @@ namespace meta_hpp::detail::class_type_data_impl
});
}
}
template < class_kind Class >
any_type_list make_argument_types() {
using ct = class_traits<Class>;
using ct_argument_types = typename ct::argument_types;
return []<std::size_t... Is>(std::index_sequence<Is...>) {
any_type_list argument_types;
argument_types.reserve(type_list_arity_v<ct_argument_types>);
[[maybe_unused]] const auto make_argument_type = []<std::size_t I>(index_constant<I>) {
return resolve_type<type_list_at_t<I, ct_argument_types>>();
};
(argument_types.emplace_back(make_argument_type(index_constant<Is>{})), ...);
return argument_types;
}(std::make_index_sequence<type_list_arity_v<ct_argument_types>>());
}
template < class_kind Class >
uvalue_list make_argument_values() {
using ct = class_traits<Class>;
using ct_argument_values = decltype(ct::argument_values);
return []<std::size_t... Is>(std::index_sequence<Is...>) {
uvalue_list argument_values;
argument_values.reserve(std::tuple_size_v<ct_argument_values>);
[[maybe_unused]] const auto make_argument_value = []<std::size_t I>(index_constant<I>) {
return overloaded{
[](decltype(std::ignore)) { return uvalue{}; },
[](auto&& value) { return uvalue{META_HPP_FWD(value)}; },
}(std::get<I>(ct::argument_values));
};
(argument_values.emplace_back(make_argument_value(index_constant<Is>{})), ...);
return argument_values;
}(std::make_index_sequence<std::tuple_size_v<ct_argument_values>>());
}
}
namespace meta_hpp::detail
@@ -70,7 +109,8 @@ namespace meta_hpp::detail
, flags{class_traits<Class>::make_flags()}
, size{class_traits<Class>::size}
, align{class_traits<Class>::align}
, argument_types{resolve_types(typename class_traits<Class>::argument_types{})} {
, argument_types{class_type_data_impl::make_argument_types<Class>()}
, argument_values{class_type_data_impl::make_argument_values<Class>()} {
class_type_data_impl::new_base_info_t new_base_info;
class_type_data_impl::fill_upcast_info<Class>(new_base_info);
base_classes.swap(new_base_info.base_classes);
@@ -112,10 +152,18 @@ namespace meta_hpp
return position < data_->argument_types.size() ? data_->argument_types[position] : any_type{};
}
inline const uvalue& class_type::get_argument_value(std::size_t position) const noexcept {
return position < data_->argument_values.size() ? data_->argument_values[position] : uvalue::empty_value;
}
inline const any_type_list& class_type::get_argument_types() const noexcept {
return data_->argument_types;
}
inline const uvalue_list& class_type::get_argument_values() const noexcept {
return data_->argument_values;
}
inline const class_list& class_type::get_base_classes() const noexcept {
return data_->base_classes;
}