libcxx/test/std/utilities/format/format.functions/format.locale.pass.cpp

   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
  10 // UNSUPPORTED: no-localization
  11 // UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
  12
  13 // XFAIL: availability-fp_to_chars-missing
  14
  15 // <format>
  16
  17 // template<class... Args>
  18 //   string format(const locale& loc, format-string<Args...> fmt, const Args&... args);
  19 // template<class... Args>
  20 //   wstring format(const locale& loc, wformat-string<Args...> fmt, const Args&... args);
  21
  22 #include <format>
  23 #include <cassert>
  24 #include <iostream>
  25 #include <vector>
  26
  27 #include "test_macros.h"
  28 #include "format_tests.h"
  29 #include "string_literal.h"
  30 #include "test_format_string.h"
  31 #include "assert_macros.h"
  32 #include "concat_macros.h"
  33
  34 auto test =
  35     []<class CharT, class... Args>(
  36         std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) constexpr {
  37       std::basic_string<CharT> out = std::format(std::locale(), fmt, std::forward<Args>(args)...);
  38       TEST_REQUIRE(
  39           out == expected,
  40           TEST_WRITE_CONCATENATED(
  41               "\nFormat string   ", fmt.get(), "\nExpected output ", expected, "\nActual output   ", out, '\n'));
  42     };
  43
  44 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, Args&&...) {
  45   // After P2216 most exceptions thrown by std::format become ill-formed.
  46   // Therefore this tests does nothing.
  47   // A basic ill-formed test is done in format.locale.verify.cpp
  48   // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument.
  49 };
  50
  51 int main(int, char**) {
  52   format_tests<char, execution_modus::full>(test, test_exception);
  53
  54 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  55   format_tests_char_to_wchar_t(test);
  56   format_tests<wchar_t, execution_modus::full>(test, test_exception);
  57 #endif
  58
  59   return 0;
  60 }