30#ifndef _GLIBCXX_EXPERIMENTAL_UTILITY
31#define _GLIBCXX_EXPERIMENTAL_UTILITY 1
33#if __cplusplus >= 201402L
35#include <bits/uses_allocator.h>
39_GLIBCXX_BEGIN_NAMESPACE_VERSION
41namespace experimental {
42inline namespace fundamentals_v2 {
44 using erased_type = std::__erased_type;
48_GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.