consteval std::string_view display_string_of( std::meta::info r );

consteval std::u8string_view u8display_string_of( std::meta::info r );

Returns an implementation-defined string. Implementations are encouraged to produce text that is helpful in identifying what r represents.

Parameters

Return value

An implementation-defined string. Where possible, the string should be suitable for identifying the represented construct.

Notes

The result V is null-terminated: V.data()[V.size()] is guaranteed to be '\0'. Each element in V is a potentially non-unique object with static storage duration that is usable in constant expressions; a pointer to such an element is not suitable for use as a template argument for a non-type template parameter of pointer type.

Example

#include <initializer_list>
#include <iostream>
#include <meta>
#include <vector>

struct S { int m; };
enum class E { e };
void foo() noexcept;

int main()
{
    template for
    (
        static constexpr auto reflections =
        {
            ^^S, ^^S::m, ^^E, ^^E::e, ^^foo, ^^std, ^^std::vector<int>
        };
        constexpr auto reflection : reflections
    )
        std::cout << display_string_of(reflection) << '\n';
}

S
S::m
E
E::e
void foo()
std
std::vector<int>

See also