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meta: more concepts, less sfinae

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skypjack
2026-01-30 18:31:08 +01:00
parent 3cc3a03c40
commit 392e522b62
1 changed files with 9 additions and 6 deletions
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15
src/entt/meta/container.hpp
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@@ -28,29 +28,32 @@ namespace entt {
/*! @cond ENTT_INTERNAL */
namespace internal {
template<typename Type, typename = void>
template<typename Type>
struct sequence_container_extent: integral_constant<meta_dynamic_extent> {};
template<typename Type>
struct sequence_container_extent<Type, std::enable_if_t<is_complete_v<std::tuple_size<Type>>>>: integral_constant<std::tuple_size_v<Type>> {};
requires is_complete_v<std::tuple_size<Type>>
struct sequence_container_extent<Type>: integral_constant<std::tuple_size_v<Type>> {};
template<typename Type>
inline constexpr std::size_t sequence_container_extent_v = sequence_container_extent<Type>::value;
template<typename, typename = void>
template<typename>
struct key_only_associative_container: std::true_type {};
template<typename Type>
struct key_only_associative_container<Type, std::void_t<typename Type::mapped_type>>: std::false_type {};
requires requires { typename Type::mapped_type; }
struct key_only_associative_container<Type>: std::false_type {};
template<typename Type>
inline constexpr bool key_only_associative_container_v = key_only_associative_container<Type>::value;
template<typename, typename = void>
template<typename>
struct reserve_aware_container: std::false_type {};
template<typename Type>
struct reserve_aware_container<Type, std::void_t<decltype(&Type::reserve)>>: std::true_type {};
requires requires { typename Type::reserve; }
struct reserve_aware_container<Type>: std::true_type {};
template<typename Type>
inline constexpr bool reserve_aware_container_v = reserve_aware_container<Type>::value;