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std::experimental::reflect::ObjectSequence

From cppreference.com
 
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
 
Extensions for reflection
Concepts
Meta-object operations
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Callable
Variable and Callable
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ParenthesizedExpression
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FunctionalConversion
Variable and Function
 
Defined in header <experimental/reflect>
template< class T >
concept ObjectSequence = Object<T> && /* see below */;
(reflection TS)

The ObjectSequence concept is satisfied by meta-object sequence types.

A meta-object sequence type is a meta-object type that is obtained from a meta-object operation that generates a sequence, e.g. get_data_members. Each element of a meta-object sequence type is a meta-object type.

[edit] Example

#include<type_traits>
#include<tuple>
#include<cmath>
#include<experimental/reflect>
 
namespace reflect = std::experimental::reflect;
 
template<reflect::Typed... Ms>
using tuple_from_seq_t = std::tuple<reflect::get_reflected_type_t<
    reflect::get_type_t<Ms>>...>;
 
template<reflect::Record T>
using collect_tuple = reflect::unpack_sequence_t<
    tuple_from_seq_t,
    reflect::get_data_members<T>>;
 
int main()
{
    static_assert(reflect::ObjectSequence<
                      reflect::get_data_members<reflexpr(std::div_t)>>, "");
    static_assert(std::is_same<collect_tuple<reflexpr(std::div_t)>,
                               std::tuple<int, int>>::value, "");
}

[edit] See also