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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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-localization11// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME12 13// TODO FMT This test should not require std::to_chars(floating-point)14// XFAIL: availability-fp_to_chars-missing15 16// TODO FMT Investigate Windows issues.17// XFAIL: msvc18 19// REQUIRES: locale.fr_FR.UTF-820// REQUIRES: locale.ja_JP.UTF-821 22// <chrono>23 24// template<class charT> struct formatter<chrono::weekday_index, charT>;25 26#include <chrono>27#include <format>28 29#include <cassert>30#include <concepts>31#include <locale>32#include <iostream>33#include <type_traits>34 35#include "formatter_tests.h"36#include "make_string.h"37#include "platform_support.h" // locale name macros38#include "test_macros.h"39 40template <class CharT>41static void test_no_chrono_specs() {42  using namespace std::literals::chrono_literals;43 44  // Valid weekday valid index45  check(SV("Sun[1]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(0), 1});46 47  // Invalid weekday valid index48  check(SV("8 is not a valid weekday[1]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(8), 1});49  check(SV("255 is not a valid weekday[1]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(255), 1});50 51  // Valid weekday invalid index52  check(SV("Sun[0 is not a valid index]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(0), 0});53  check(SV("Sun[6 is not a valid index]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(0), 6});54  check(SV("Sun[255 is not a valid index]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(0), 255});55 56  // Invalid weekday invalid index57  check(SV("8 is not a valid weekday[0 is not a valid index]"),58        SV("{}"),59        std::chrono::weekday_indexed{std::chrono::weekday(8), 0});60  check(SV("127 is not a valid weekday[6 is not a valid index]"),61        SV("{}"),62        std::chrono::weekday_indexed{std::chrono::weekday(127), 6});63  check(SV("255 is not a valid weekday[255 is not a valid index]"),64        SV("{}"),65        std::chrono::weekday_indexed{std::chrono::weekday(255), 255});66}67 68template <class CharT>69static void test_valid_values() {70  constexpr std::basic_string_view<CharT> fmt =71      SV("{:%%u='%u'%t%%Ou='%Ou'%t%%w='%w'%t%%Ow='%Ow'%t%%a='%a'%t%%A='%A'%n}");72  constexpr std::basic_string_view<CharT> lfmt =73      SV("{:L%%u='%u'%t%%Ou='%Ou'%t%%w='%w'%t%%Ow='%Ow'%t%%a='%a'%t%%A='%A'%n}");74 75  const std::locale loc(LOCALE_ja_JP_UTF_8);76  std::locale::global(std::locale(LOCALE_fr_FR_UTF_8));77 78  // Non localized output using C-locale79  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='Sun'\t%A='Sunday'\n"),80        fmt,81        std::chrono::weekday_indexed{std::chrono::weekday(0), 0});82  check(SV("%u='1'\t%Ou='1'\t%w='1'\t%Ow='1'\t%a='Mon'\t%A='Monday'\n"),83        fmt,84        std::chrono::weekday_indexed{std::chrono::weekday(1), 1});85  check(SV("%u='2'\t%Ou='2'\t%w='2'\t%Ow='2'\t%a='Tue'\t%A='Tuesday'\n"),86        fmt,87        std::chrono::weekday_indexed{std::chrono::weekday(2), 2});88  check(SV("%u='3'\t%Ou='3'\t%w='3'\t%Ow='3'\t%a='Wed'\t%A='Wednesday'\n"),89        fmt,90        std::chrono::weekday_indexed{std::chrono::weekday(3), 3});91  check(SV("%u='4'\t%Ou='4'\t%w='4'\t%Ow='4'\t%a='Thu'\t%A='Thursday'\n"),92        fmt,93        std::chrono::weekday_indexed{std::chrono::weekday(4), 4});94  check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\t%a='Fri'\t%A='Friday'\n"),95        fmt,96        std::chrono::weekday_indexed{std::chrono::weekday(5), 5});97  check(SV("%u='6'\t%Ou='6'\t%w='6'\t%Ow='6'\t%a='Sat'\t%A='Saturday'\n"),98        fmt,99        std::chrono::weekday_indexed{std::chrono::weekday(6), 6});100  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='Sun'\t%A='Sunday'\n"),101        fmt,102        std::chrono::weekday_indexed{std::chrono::weekday(7), 7});103 104  // Use the global locale (fr_FR)105#if defined(__APPLE__)106  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='Dim'\t%A='Dimanche'\n"),107        lfmt,108        std::chrono::weekday_indexed{std::chrono::weekday(0), 0});109  check(SV("%u='1'\t%Ou='1'\t%w='1'\t%Ow='1'\t%a='Lun'\t%A='Lundi'\n"),110        lfmt,111        std::chrono::weekday_indexed{std::chrono::weekday(1), 1});112  check(SV("%u='2'\t%Ou='2'\t%w='2'\t%Ow='2'\t%a='Mar'\t%A='Mardi'\n"),113        lfmt,114        std::chrono::weekday_indexed{std::chrono::weekday(2), 2});115  check(SV("%u='3'\t%Ou='3'\t%w='3'\t%Ow='3'\t%a='Mer'\t%A='Mercredi'\n"),116        lfmt,117        std::chrono::weekday_indexed{std::chrono::weekday(3), 3});118  check(SV("%u='4'\t%Ou='4'\t%w='4'\t%Ow='4'\t%a='Jeu'\t%A='Jeudi'\n"),119        lfmt,120        std::chrono::weekday_indexed{std::chrono::weekday(4), 4});121  check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\t%a='Ven'\t%A='Vendredi'\n"),122        lfmt,123        std::chrono::weekday_indexed{std::chrono::weekday(5), 5});124  check(SV("%u='6'\t%Ou='6'\t%w='6'\t%Ow='6'\t%a='Sam'\t%A='Samedi'\n"),125        lfmt,126        std::chrono::weekday_indexed{std::chrono::weekday(6), 6});127  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='Dim'\t%A='Dimanche'\n"),128        lfmt,129        std::chrono::weekday_indexed{std::chrono::weekday(7), 7});130#else  // defined(__APPLE__)131  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='dim.'\t%A='dimanche'\n"),132        lfmt,133        std::chrono::weekday_indexed{std::chrono::weekday(0), 0});134  check(SV("%u='1'\t%Ou='1'\t%w='1'\t%Ow='1'\t%a='lun.'\t%A='lundi'\n"),135        lfmt,136        std::chrono::weekday_indexed{std::chrono::weekday(1), 1});137  check(SV("%u='2'\t%Ou='2'\t%w='2'\t%Ow='2'\t%a='mar.'\t%A='mardi'\n"),138        lfmt,139        std::chrono::weekday_indexed{std::chrono::weekday(2), 2});140  check(SV("%u='3'\t%Ou='3'\t%w='3'\t%Ow='3'\t%a='mer.'\t%A='mercredi'\n"),141        lfmt,142        std::chrono::weekday_indexed{std::chrono::weekday(3), 3});143  check(SV("%u='4'\t%Ou='4'\t%w='4'\t%Ow='4'\t%a='jeu.'\t%A='jeudi'\n"),144        lfmt,145        std::chrono::weekday_indexed{std::chrono::weekday(4), 4});146  check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\t%a='ven.'\t%A='vendredi'\n"),147        lfmt,148        std::chrono::weekday_indexed{std::chrono::weekday(5), 5});149  check(SV("%u='6'\t%Ou='6'\t%w='6'\t%Ow='6'\t%a='sam.'\t%A='samedi'\n"),150        lfmt,151        std::chrono::weekday_indexed{std::chrono::weekday(6), 6});152  check(SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='dim.'\t%A='dimanche'\n"),153        lfmt,154        std::chrono::weekday_indexed{std::chrono::weekday(7), 7});155#endif // defined(__APPLE__)156 157  // Use supplied locale (ja_JP).158  // This locale has a different alternate, but not on all platforms159#if defined(_WIN32) || defined(__APPLE__) || defined(_AIX) || defined(__FreeBSD__)160  check(loc,161        SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='日'\t%A='日曜日'\n"),162        lfmt,163        std::chrono::weekday_indexed{std::chrono::weekday(0), 0});164  check(loc,165        SV("%u='1'\t%Ou='1'\t%w='1'\t%Ow='1'\t%a='月'\t%A='月曜日'\n"),166        lfmt,167        std::chrono::weekday_indexed{std::chrono::weekday(1), 1});168  check(loc,169        SV("%u='2'\t%Ou='2'\t%w='2'\t%Ow='2'\t%a='火'\t%A='火曜日'\n"),170        lfmt,171        std::chrono::weekday_indexed{std::chrono::weekday(2), 2});172  check(loc,173        SV("%u='3'\t%Ou='3'\t%w='3'\t%Ow='3'\t%a='水'\t%A='水曜日'\n"),174        lfmt,175        std::chrono::weekday_indexed{std::chrono::weekday(3), 3});176  check(loc,177        SV("%u='4'\t%Ou='4'\t%w='4'\t%Ow='4'\t%a='木'\t%A='木曜日'\n"),178        lfmt,179        std::chrono::weekday_indexed{std::chrono::weekday(4), 4});180  check(loc,181        SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\t%a='金'\t%A='金曜日'\n"),182        lfmt,183        std::chrono::weekday_indexed{std::chrono::weekday(5), 5});184  check(loc,185        SV("%u='6'\t%Ou='6'\t%w='6'\t%Ow='6'\t%a='土'\t%A='土曜日'\n"),186        lfmt,187        std::chrono::weekday_indexed{std::chrono::weekday(6), 6});188  check(loc,189        SV("%u='7'\t%Ou='7'\t%w='0'\t%Ow='0'\t%a='日'\t%A='日曜日'\n"),190        lfmt,191        std::chrono::weekday_indexed{std::chrono::weekday(7), 7});192#else  // defined(_WIN32) || defined(__APPLE__) || defined(_AIX) || defined(__FreeBSD__)193  check(loc,194        SV("%u='7'\t%Ou='七'\t%w='0'\t%Ow='〇'\t%a='日'\t%A='日曜日'\n"),195        lfmt,196        std::chrono::weekday_indexed{std::chrono::weekday(0), 0});197  check(loc,198        SV("%u='1'\t%Ou='一'\t%w='1'\t%Ow='一'\t%a='月'\t%A='月曜日'\n"),199        lfmt,200        std::chrono::weekday_indexed{std::chrono::weekday(1), 1});201  check(loc,202        SV("%u='2'\t%Ou='二'\t%w='2'\t%Ow='二'\t%a='火'\t%A='火曜日'\n"),203        lfmt,204        std::chrono::weekday_indexed{std::chrono::weekday(2), 2});205  check(loc,206        SV("%u='3'\t%Ou='三'\t%w='3'\t%Ow='三'\t%a='水'\t%A='水曜日'\n"),207        lfmt,208        std::chrono::weekday_indexed{std::chrono::weekday(3), 3});209  check(loc,210        SV("%u='4'\t%Ou='四'\t%w='4'\t%Ow='四'\t%a='木'\t%A='木曜日'\n"),211        lfmt,212        std::chrono::weekday_indexed{std::chrono::weekday(4), 4});213  check(loc,214        SV("%u='5'\t%Ou='五'\t%w='5'\t%Ow='五'\t%a='金'\t%A='金曜日'\n"),215        lfmt,216        std::chrono::weekday_indexed{std::chrono::weekday(5), 5});217  check(loc,218        SV("%u='6'\t%Ou='六'\t%w='6'\t%Ow='六'\t%a='土'\t%A='土曜日'\n"),219        lfmt,220        std::chrono::weekday_indexed{std::chrono::weekday(6), 6});221  check(loc,222        SV("%u='7'\t%Ou='七'\t%w='0'\t%Ow='〇'\t%a='日'\t%A='日曜日'\n"),223        lfmt,224        std::chrono::weekday_indexed{std::chrono::weekday(7), 7});225#endif // defined(_WIN32) || defined(__APPLE__) || defined(_AIX) || defined(__FreeBSD__)226 227  std::locale::global(std::locale::classic());228}229 230template <class CharT>231static void test_invalid_values() {232  // Test that %a and %A throw an exception.233  check_exception("Formatting a weekday name needs a valid weekday",234                  SV("{:%a}"),235                  std::chrono::weekday_indexed{std::chrono::weekday(8), 1});236  check_exception("Formatting a weekday name needs a valid weekday",237                  SV("{:%a}"),238                  std::chrono::weekday_indexed{std::chrono::weekday(255), 1});239  check_exception("Formatting a weekday name needs a valid weekday",240                  SV("{:%A}"),241                  std::chrono::weekday_indexed{std::chrono::weekday(8), 1});242  check_exception("Formatting a weekday name needs a valid weekday",243                  SV("{:%A}"),244                  std::chrono::weekday_indexed{std::chrono::weekday(255), 1});245 246  const std::locale loc(LOCALE_ja_JP_UTF_8);247  std::locale::global(std::locale(LOCALE_fr_FR_UTF_8));248 249  { // Invalid weekday, can't test %a and %A250    constexpr std::basic_string_view<CharT> fmt  = SV("{:%%u='%u'%t%%Ou='%Ou'%t%%w='%w'%t%%Ow='%Ow'%n}");251    constexpr std::basic_string_view<CharT> lfmt = SV("{:L%%u='%u'%t%%Ou='%Ou'%t%%w='%w'%t%%Ow='%Ow'%n}");252#if defined(__APPLE__) || defined(__FreeBSD__)253    // Non localized output using C-locale254    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});255    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});256    check(SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),257          fmt,258          std::chrono::weekday_indexed{std::chrono::weekday(255), 0});259    check(SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),260          fmt,261          std::chrono::weekday_indexed{std::chrono::weekday(255), 1});262 263    // Use the global locale (fr_FR)264    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});265    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});266    check(SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),267          lfmt,268          std::chrono::weekday_indexed{std::chrono::weekday(255), 0});269    check(SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),270          lfmt,271          std::chrono::weekday_indexed{std::chrono::weekday(255), 1});272 273    // Use supplied locale (ja_JP). This locale has a different alternate.274    check(275        loc, SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});276    check(277        loc, SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});278    check(loc,279          SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),280          lfmt,281          std::chrono::weekday_indexed{std::chrono::weekday(255), 0});282    check(loc,283          SV("%u='255'\t%Ou='255'\t%w='255'\t%Ow='255'\n"),284          lfmt,285          std::chrono::weekday_indexed{std::chrono::weekday(255), 1});286#elif defined(_WIN32) //  defined(__APPLE__) || defined(__FreeBSD__)287    // Non localized output using C-locale288    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});289    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});290    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});291    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});292 293    // Use the global locale (fr_FR)294    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});295    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});296    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});297    check(SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});298 299    // Use supplied locale (ja_JP). This locale has a different alternate.300    check(loc, SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});301    check(loc, SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});302    check(loc, SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});303    check(loc, SV("%u=''\t%Ou=''\t%w=''\t%Ow=''\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});304#elif defined(_AIX)   //  defined(__APPLE__) || defined(__FreeBSD__)305    // Non localized output using C-locale306    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});307    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});308    check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});309    check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});310 311    // Use the global locale (fr_FR)312    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});313    check(SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});314    check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});315    check(SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});316 317    // Use supplied locale (ja_JP). This locale has a different alternate.318    check(319        loc, SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});320    check(321        loc, SV("%u='8'\t%Ou='8'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});322    check(loc,323          SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"),324          lfmt,325          std::chrono::weekday_indexed{std::chrono::weekday(255), 0});326    check(loc,327          SV("%u='5'\t%Ou='5'\t%w='5'\t%Ow='5'\n"),328          lfmt,329          std::chrono::weekday_indexed{std::chrono::weekday(255), 1});330#else                 // defined(__APPLE__) || defined(__FreeBSD__)331    // Non localized output using C-locale332    check(SV("%u='1'\t%Ou='1'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});333    check(SV("%u='1'\t%Ou='1'\t%w='8'\t%Ow='8'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});334    check(335        SV("%u='3'\t%Ou='3'\t%w='255'\t%Ow='255'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});336    check(337        SV("%u='3'\t%Ou='3'\t%w='255'\t%Ow='255'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});338 339    // Use the global locale (fr_FR)340    check(SV("%u='1'\t%Ou='1'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 0});341    check(SV("%u='1'\t%Ou='1'\t%w='8'\t%Ow='8'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(8), 1});342    check(343        SV("%u='3'\t%Ou='3'\t%w='255'\t%Ow='255'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 0});344    check(345        SV("%u='3'\t%Ou='3'\t%w='255'\t%Ow='255'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(255), 1});346 347    // Use supplied locale (ja_JP). This locale has a different alternate.348    check(loc,349          SV("%u='1'\t%Ou='一'\t%w='8'\t%Ow='八'\n"),350          lfmt,351          std::chrono::weekday_indexed{std::chrono::weekday(8), 0});352    check(loc,353          SV("%u='1'\t%Ou='一'\t%w='8'\t%Ow='八'\n"),354          lfmt,355          std::chrono::weekday_indexed{std::chrono::weekday(8), 1});356    check(loc,357          SV("%u='3'\t%Ou='三'\t%w='255'\t%Ow='255'\n"),358          lfmt,359          std::chrono::weekday_indexed{std::chrono::weekday(255), 0});360    check(loc,361          SV("%u='3'\t%Ou='三'\t%w='255'\t%Ow='255'\n"),362          lfmt,363          std::chrono::weekday_indexed{std::chrono::weekday(255), 1});364#endif                // defined(__APPLE__) || defined(__FreeBSD__)365  }366 367  { // Valid weekday, tests %a and %A368    constexpr std::basic_string_view<CharT> fmt  = SV("{:%%a='%a'%t%%A='%A'%n}");369    constexpr std::basic_string_view<CharT> lfmt = SV("{:L%%a='%a'%t%%A='%A'%n}");370 371    // Non localized output using C-locale372    check(SV("%a='Sun'\t%A='Sunday'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 0});373    check(SV("%a='Sun'\t%A='Sunday'\n"), fmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 6});374 375    // Use the global locale (fr_FR)376#if defined(__APPLE__)377    check(SV("%a='Dim'\t%A='Dimanche'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 0});378    check(SV("%a='Dim'\t%A='Dimanche'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 6});379#else  // defined(__APPLE__)380    check(SV("%a='dim.'\t%A='dimanche'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 0});381    check(SV("%a='dim.'\t%A='dimanche'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 6});382#endif // defined(__APPLE__)383 384    // Use supplied locale (ja_JP)385    check(loc, SV("%a='日'\t%A='日曜日'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 0});386    check(loc, SV("%a='日'\t%A='日曜日'\n"), lfmt, std::chrono::weekday_indexed{std::chrono::weekday(0), 6});387  }388 389  std::locale::global(std::locale::classic());390}391 392template <class CharT>393static void test() {394  test_no_chrono_specs<CharT>();395  test_valid_values<CharT>();396  test_invalid_values<CharT>();397  check_invalid_types<CharT>({SV("a"), SV("A"), SV("t"), SV("u"), SV("w"), SV("Ou"), SV("Ow")},398                             std::chrono::weekday_indexed{std::chrono::weekday(0), 1});399 400  check_exception("The format specifier expects a '%' or a '}'",401                  SV("{:A"),402                  std::chrono::weekday_indexed{std::chrono::weekday(0), 1});403  check_exception(404      "The chrono specifiers contain a '{'", SV("{:%%{"), std::chrono::weekday_indexed{std::chrono::weekday(0), 1});405  check_exception("End of input while parsing a conversion specifier",406                  SV("{:%"),407                  std::chrono::weekday_indexed{std::chrono::weekday(0), 1});408  check_exception("End of input while parsing the modifier E",409                  SV("{:%E"),410                  std::chrono::weekday_indexed{std::chrono::weekday(0), 1});411  check_exception("End of input while parsing the modifier O",412                  SV("{:%O"),413                  std::chrono::weekday_indexed{std::chrono::weekday(0), 1});414 415  // Precision not allowed416  check_exception("The format specifier expects a '%' or a '}'",417                  SV("{:.3}"),418                  std::chrono::weekday_indexed{std::chrono::weekday(0), 1});419}420 421int main(int, char**) {422  test<char>();423 424#ifndef TEST_HAS_NO_WIDE_CHARACTERS425  test<wchar_t>();426#endif427 428  return 0;429}430