libcxx/test/std/thread/thread.threads/thread.thread.class/thread.thread.id/format.functions.format.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   3 // See https://llvm.org/LICENSE.txt for license information.
   4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   5 //
   6 //===----------------------------------------------------------------------===//
   7
   8 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
   9 // UNSUPPORTED: no-threads
  10
  11 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
  12
  13 // TODO FMT This test should not require std::to_chars(floating-point)
  14 // XFAIL: availability-fp_to_chars-missing
  15
  16 // <thread>
  17
  18 // template<class charT>
  19 // struct formatter<thread::id, charT>;
  20
  21 // template<class... Args>
  22 //   string format(format_string<Args...> fmt, Args&&... args);
  23 // template<class... Args>
  24 //   wstring format(wformat_string<Args...> fmt, Args&&... args);
  25
  26 #include <format>
  27 #include <cassert>
  28
  29 #include "assert_macros.h"
  30 #include "concat_macros.h"
  31 #include "format.functions.tests.h"
  32 #include "test_format_string.h"
  33 #include "test_macros.h"
  34
  35 auto test = []<class CharT, class... Args>(
  36                 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) {
  37   std::basic_string<CharT> out = std::format(fmt, std::forward<Args>(args)...);
  38   TEST_REQUIRE(out == expected,
  39                TEST_WRITE_CONCATENATED(
  40                    "\nFormat string   ", fmt, "\nExpected output ", expected, "\nActual output   ", out, '\n'));
  41 };
  42
  43 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, Args&&...) {
  44   // After P2216 most exceptions thrown by std::format become ill-formed.
  45   // Therefore this tests does nothing.
  46 };
  47
  48 int main(int, char**) {
  49   format_tests<char>(test, test_exception);
  50
  51 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  52   format_tests<wchar_t>(test, test_exception);
  53 #endif
  54
  55   return 0;
  56 }