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Start migrating some C++17 traits work to Concepts.

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This commit is contained in:
ADAM David Alan Martin
2023-10-25 22:23:17 -04:00
parent a62335960e
commit ae5151c913
3 changed files with 27 additions and 32 deletions
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15
Reflection/tuplizeAggregate.h
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@ -17,21 +17,18 @@ namespace Alepha::Hydrogen::Reflection
{
inline namespace exports {}
template< typename T, typename= void >
struct has_salient_members_constant : std::false_type {};
template< typename T >
struct has_salient_members_constant< T, std::void_t< decltype( T::salient_members ) > >
: std::true_type {};
template< typename T >
constexpr bool has_salient_members_constant_v= has_salient_members_constant< T >::value;
concept SalientMembers=
requires( const T &t )
{
{ T::salient_members } -> ConvertibleTo< std::size_t >;
};
template< typename T >
constexpr std::size_t
compute_salient_members_count_impl()
{
if constexpr( has_salient_members_constant_v< T > ) return T::salient_members;
if constexpr( SalientMembers< T > ) return T::salient_members;
else return aggregate_member_count_v< std::decay_t< T > >;
}