libcxx/test/std/time/time.syn/formatter.weekday_index.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 // TODO FMT This test should not require std::to_chars(floating-point)
  14 // XFAIL: availability-fp_to_chars-missing
  15
  16 // TODO FMT Investigate Windows issues.
  17 // XFAIL: msvc
  18
  19 // REQUIRES: locale.fr_FR.UTF-8
  20 // REQUIRES: locale.ja_JP.UTF-8
  21
  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 macros
  38 #include "test_macros.h"
  39
  40 template <class CharT>
  41 static void test_no_chrono_specs() {
  42   using namespace std::literals::chrono_literals;
  43
  44   // Valid weekday valid index
  45   check(SV("Sun[1]"), SV("{}"), std::chrono::weekday_indexed{std::chrono::weekday(0), 1});
  46
  47   // Invalid weekday valid index
  48   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 index
  52   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 index
  57   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
  68 template <class CharT>
  69 static 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-locale
  79   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 platforms
 159 #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
 230 template <class CharT>
 231 static 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 %A
 250     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-locale
 254     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-locale
 288     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-locale
 306     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-locale
 332     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 %A
 368     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-locale
 372     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
 392 template <class CharT>
 393 static 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 allowed
 416   check_exception("The format specifier expects a '%' or a '}'",
 417                   SV("{:.3}"),
 418                   std::chrono::weekday_indexed{std::chrono::weekday(0), 1});
 419 }
 420
 421 int main(int, char**) {
 422   test<char>();
 423
 424 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
 425   test<wchar_t>();
 426 #endif
 427
 428   return 0;
 429 }