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, c++14, c++17, c++20
10// UNSUPPORTED: no-threads
11
12// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
13
14// <thread>
15
16// template<class charT>
17// struct formatter<thread::id, charT>;
18
19// template<class FormatContext>
20// typename FormatContext::iterator
21// format(const T& r, FormatContext& ctx) const;
22
23// Note this tests the basics of this function. It's tested in more detail in
24// the format functions test.
25
26#include <cassert>
27#include <concepts>
28#include <iterator>
29#include <thread>
30
31#include "test_format_context.h"
32#include "test_macros.h"
33#include "make_string.h"
34
35#define SV(S) MAKE_STRING_VIEW(CharT, S)
36
37template <class StringViewT>
38void test_format(StringViewT expected, std::thread::id arg) {
39 using CharT = typename StringViewT::value_type;
40 using String = std::basic_string<CharT>;
41 using OutIt = std::back_insert_iterator<String>;
42 using FormatCtxT = std::basic_format_context<OutIt, CharT>;
43
44 const std::formatter<std::thread::id, CharT> formatter;
45
46 String result;
47 OutIt out = std::back_inserter(result);
48 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg));
49 formatter.format(arg, format_ctx);
50 assert(result == expected);
51}
52
53template <class CharT>
54void test_fmt() {
55#if !defined(__APPLE__) && !defined(__FreeBSD__)
56 test_format(SV("0"), std::thread::id());
57#else
58 test_format(SV("0x0"), std::thread::id());
59#endif
60}
61
62void test() {
63 test_fmt<char>();
64#ifndef TEST_HAS_NO_WIDE_CHARACTERS
65 test_fmt<wchar_t>();
66#endif
67}
68
69int main(int, char**) {
70 test();
71
72 return 0;
73}
74

source code of libcxx/test/std/thread/thread.threads/thread.thread.class/thread.thread.id/format.pass.cpp