std::meta::parent_of - cppreference.com

consteval std::meta::info parent_of( std::meta::info r );

Determines the smallest class, enumeration, function, or namespace scope that contains the declaration of what r represents. Returns a reflection of that class/enum/function/namespace.

If r represents a non-static data member or unnamed bit-field of an anonymous union, the result represents that union.

If r represents a direct base class relationship (i.e. an element of std::meta::bases_of(rc, ctx)), the result represents the derived class in the relationship.

Parameters

Return value

A reflection of the entity whose scope contains the declaration of what r represents.

Exceptions

Throws std::meta::exception unless std::meta::has_parent(r) is true.

Example

#include <meta>

struct I {};

struct F : I
{
    union { int o; };

    enum N { A };
};

constexpr auto ctx = std::meta::access_context::current();
static_assert(std::meta::parent_of(^^F) == ^^::);
static_assert(std::meta::parent_of(std::meta::bases_of(^^F, ctx)[0]) == ^^F);
static_assert(std::meta::is_union_type(std::meta::parent_of(^^F::o)));
static_assert(std::meta::parent_of(^^F::N) == ^^F);
static_assert(std::meta::parent_of(^^F::A) == ^^F::N);

int main() {}

See also