1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11
10// <experimental/type_traits>
11//
12// struct nonesuch
13
14#include <experimental/type_traits>
15#include <string>
16
17#include "test_macros.h"
18
19namespace ex = std::experimental;
20
21struct such {};
22void foo(const such &) {}
23void foo(const ex::nonesuch &) {}
24
25int main(int, char**) {
26 foo({}); // nonesuch is not an aggregate
27
28 return 0;
29}
30

source code of libcxx/test/std/experimental/utilities/meta/meta.detect/nonesuch.pass.cpp