1 // Formatting library for C++ - formatting library tests
2 //
3 // Copyright (c) 2012 - present, Victor Zverovich
4 // All rights reserved.
5 //
6 // For the license information refer to format.h.
7
8 #include "fmt/xchar.h"
9
10 #include <algorithm>
11 #include <complex>
12 #include <cwchar>
13 #include <vector>
14
15 #include "fmt/chrono.h"
16 #include "fmt/color.h"
17 #include "fmt/ostream.h"
18 #include "fmt/ranges.h"
19 #include "fmt/std.h"
20 #include "gtest-extra.h" // Contains
21 #include "util.h" // get_locale
22
23 using fmt::detail::max_value;
24 using testing::Contains;
25
26 #if defined(__MINGW32__) && !defined(_UCRT)
27 // Only C89 conversion specifiers when using MSVCRT instead of UCRT
28 # define FMT_HAS_C99_STRFTIME 0
29 #else
30 # define FMT_HAS_C99_STRFTIME 1
31 #endif
32
33 struct non_string {};
34
35 template <typename T> class is_string_test : public testing::Test {};
36
37 using string_char_types = testing::Types<char, wchar_t, char16_t, char32_t>;
38 TYPED_TEST_SUITE(is_string_test, string_char_types);
39
40 template <typename Char>
41 struct derived_from_string_view : fmt::basic_string_view<Char> {};
42
TYPED_TEST(is_string_test,is_string)43 TYPED_TEST(is_string_test, is_string) {
44 EXPECT_TRUE(fmt::detail::is_string<TypeParam*>::value);
45 EXPECT_TRUE(fmt::detail::is_string<const TypeParam*>::value);
46 EXPECT_TRUE(fmt::detail::is_string<TypeParam[2]>::value);
47 EXPECT_TRUE(fmt::detail::is_string<const TypeParam[2]>::value);
48 EXPECT_TRUE(fmt::detail::is_string<std::basic_string<TypeParam>>::value);
49 EXPECT_TRUE(fmt::detail::is_string<fmt::basic_string_view<TypeParam>>::value);
50 EXPECT_TRUE(
51 fmt::detail::is_string<derived_from_string_view<TypeParam>>::value);
52 using fmt_string_view = fmt::detail::std_string_view<TypeParam>;
53 EXPECT_TRUE(std::is_empty<fmt_string_view>::value !=
54 fmt::detail::is_string<fmt_string_view>::value);
55 EXPECT_FALSE(fmt::detail::is_string<non_string>::value);
56 }
57
58 // std::is_constructible is broken in MSVC until version 2015.
59 #if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1900
60 struct explicitly_convertible_to_wstring_view {
operator fmt::wstring_viewexplicitly_convertible_to_wstring_view61 explicit operator fmt::wstring_view() const { return L"foo"; }
62 };
63
TEST(xchar_test,format_explicitly_convertible_to_wstring_view)64 TEST(xchar_test, format_explicitly_convertible_to_wstring_view) {
65 // Types explicitly convertible to wstring_view are not formattable by
66 // default because it may introduce ODR violations.
67 static_assert(
68 !fmt::is_formattable<explicitly_convertible_to_wstring_view>::value, "");
69 }
70 #endif
71
TEST(xchar_test,format)72 TEST(xchar_test, format) {
73 EXPECT_EQ(L"42", fmt::format(L"{}", 42));
74 EXPECT_EQ(L"4.2", fmt::format(L"{}", 4.2));
75 EXPECT_EQ(L"abc", fmt::format(L"{}", L"abc"));
76 EXPECT_EQ(L"z", fmt::format(L"{}", L'z'));
77 EXPECT_THROW(fmt::format(fmt::runtime(L"{:*\x343E}"), 42), fmt::format_error);
78 EXPECT_EQ(L"true", fmt::format(L"{}", true));
79 EXPECT_EQ(L"a", fmt::format(L"{0}", 'a'));
80 EXPECT_EQ(L"a", fmt::format(L"{0}", L'a'));
81 EXPECT_EQ(L"Cyrillic letter \x42e",
82 fmt::format(L"Cyrillic letter {}", L'\x42e'));
83 EXPECT_EQ(L"abc1", fmt::format(L"{}c{}", L"ab", 1));
84 }
85
TEST(xchar_test,is_formattable)86 TEST(xchar_test, is_formattable) {
87 static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
88 }
89
TEST(xchar_test,compile_time_string)90 TEST(xchar_test, compile_time_string) {
91 EXPECT_EQ(fmt::format(fmt::wformat_string<int>(L"{}"), 42), L"42");
92 #if defined(FMT_USE_STRING_VIEW) && FMT_CPLUSPLUS >= 201703L
93 EXPECT_EQ(fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42), L"42");
94 #endif
95 }
96
97 #if FMT_CPLUSPLUS > 201103L
98 struct custom_char {
99 int value;
100 custom_char() = default;
101
102 template <typename T>
custom_charcustom_char103 constexpr custom_char(T val) : value(static_cast<int>(val)) {}
104
operator charcustom_char105 constexpr operator char() const {
106 return value <= 0xff ? static_cast<char>(value) : '\0';
107 }
operator <custom_char108 constexpr bool operator<(custom_char c) const { return value < c.value; }
109 };
110
111 namespace std {
112
113 template <> struct char_traits<custom_char> {
114 using char_type = custom_char;
115 using int_type = int;
116 using off_type = streamoff;
117 using pos_type = streampos;
118 using state_type = mbstate_t;
119
assignstd::char_traits120 static constexpr void assign(char_type& r, const char_type& a) { r = a; }
eqstd::char_traits121 static constexpr bool eq(char_type a, char_type b) { return a == b; }
ltstd::char_traits122 static constexpr bool lt(char_type a, char_type b) { return a < b; }
comparestd::char_traits123 static FMT_CONSTEXPR int compare(const char_type* s1, const char_type* s2,
124 size_t count) {
125 for (; count; count--, s1++, s2++) {
126 if (lt(*s1, *s2)) return -1;
127 if (lt(*s2, *s1)) return 1;
128 }
129 return 0;
130 }
lengthstd::char_traits131 static FMT_CONSTEXPR size_t length(const char_type* s) {
132 size_t count = 0;
133 while (!eq(*s++, custom_char(0))) count++;
134 return count;
135 }
136 static const char_type* find(const char_type*, size_t, const char_type&);
movestd::char_traits137 static FMT_CONSTEXPR char_type* move(char_type* dest, const char_type* src,
138 size_t count) {
139 if (count == 0) return dest;
140 char_type* ret = dest;
141 if (src < dest) {
142 dest += count;
143 src += count;
144 for (; count; count--) assign(*--dest, *--src);
145 } else if (src > dest)
146 copy(dest, src, count);
147 return ret;
148 }
copystd::char_traits149 static FMT_CONSTEXPR char_type* copy(char_type* dest, const char_type* src,
150 size_t count) {
151 char_type* ret = dest;
152 for (; count; count--) assign(*dest++, *src++);
153 return ret;
154 }
assignstd::char_traits155 static FMT_CONSTEXPR char_type* assign(char_type* dest, std::size_t count,
156 char_type a) {
157 char_type* ret = dest;
158 for (; count; count--) assign(*dest++, a);
159 return ret;
160 }
161 static int_type not_eof(int_type);
162 static char_type to_char_type(int_type);
163 static int_type to_int_type(char_type);
164 static bool eq_int_type(int_type, int_type);
165 static int_type eof();
166 };
167
168 } // namespace std
169
to_ascii(custom_char c)170 auto to_ascii(custom_char c) -> char { return c; }
171
172 FMT_BEGIN_NAMESPACE
173 template <> struct is_char<custom_char> : std::true_type {};
174 FMT_END_NAMESPACE
175
TEST(xchar_test,format_custom_char)176 TEST(xchar_test, format_custom_char) {
177 const custom_char format[] = {'{', '}', 0};
178 auto result = fmt::format(format, custom_char('x'));
179 EXPECT_EQ(result.size(), 1);
180 EXPECT_EQ(result[0], custom_char('x'));
181 }
182 #endif
183
184 // Convert a char8_t string to std::string. Otherwise GTest will insist on
185 // inserting `char8_t` NTBS into a `char` stream which is disabled by P1423.
from_u8str(const S & str)186 template <typename S> std::string from_u8str(const S& str) {
187 return std::string(str.begin(), str.end());
188 }
189
TEST(xchar_test,format_to)190 TEST(xchar_test, format_to) {
191 auto buf = std::vector<wchar_t>();
192 fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');
193 EXPECT_STREQ(buf.data(), L"42");
194 }
195
TEST(xchar_test,vformat_to)196 TEST(xchar_test, vformat_to) {
197 auto args = fmt::make_wformat_args(42);
198 auto w = std::wstring();
199 fmt::vformat_to(std::back_inserter(w), L"{}", args);
200 EXPECT_EQ(L"42", w);
201 }
202
203 namespace test {
204 struct struct_as_wstring_view {};
format_as(struct_as_wstring_view)205 auto format_as(struct_as_wstring_view) -> fmt::wstring_view { return L"foo"; }
206 } // namespace test
207
TEST(xchar_test,format_as)208 TEST(xchar_test, format_as) {
209 EXPECT_EQ(fmt::format(L"{}", test::struct_as_wstring_view()), L"foo");
210 }
211
TEST(format_test,wide_format_to_n)212 TEST(format_test, wide_format_to_n) {
213 wchar_t buffer[4];
214 buffer[3] = L'x';
215 auto result = fmt::format_to_n(buffer, 3, L"{}", 12345);
216 EXPECT_EQ(5u, result.size);
217 EXPECT_EQ(buffer + 3, result.out);
218 EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4));
219 buffer[0] = L'x';
220 buffer[1] = L'x';
221 buffer[2] = L'x';
222 result = fmt::format_to_n(buffer, 3, L"{}", L'A');
223 EXPECT_EQ(1u, result.size);
224 EXPECT_EQ(buffer + 1, result.out);
225 EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4));
226 result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C');
227 EXPECT_EQ(3u, result.size);
228 EXPECT_EQ(buffer + 3, result.out);
229 EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4));
230 }
231
232 #if FMT_USE_USER_DEFINED_LITERALS
TEST(xchar_test,named_arg_udl)233 TEST(xchar_test, named_arg_udl) {
234 using namespace fmt::literals;
235 auto udl_a =
236 fmt::format(L"{first}{second}{first}{third}", L"first"_a = L"abra",
237 L"second"_a = L"cad", L"third"_a = 99);
238 EXPECT_EQ(
239 fmt::format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"),
240 fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)),
241 udl_a);
242 }
243 #endif // FMT_USE_USER_DEFINED_LITERALS
244
TEST(xchar_test,print)245 TEST(xchar_test, print) {
246 // Check that the wide print overload compiles.
247 if (fmt::detail::const_check(false)) {
248 fmt::print(L"test");
249 fmt::println(L"test");
250 }
251 }
252
TEST(xchar_test,join)253 TEST(xchar_test, join) {
254 int v[3] = {1, 2, 3};
255 EXPECT_EQ(fmt::format(L"({})", fmt::join(v, v + 3, L", ")), L"(1, 2, 3)");
256 auto t = std::tuple<wchar_t, int, float>('a', 1, 2.0f);
257 EXPECT_EQ(fmt::format(L"({})", fmt::join(t, L", ")), L"(a, 1, 2)");
258 }
259
260 enum streamable_enum {};
261
operator <<(std::wostream & os,streamable_enum)262 std::wostream& operator<<(std::wostream& os, streamable_enum) {
263 return os << L"streamable_enum";
264 }
265
266 namespace fmt {
267 template <>
268 struct formatter<streamable_enum, wchar_t> : basic_ostream_formatter<wchar_t> {
269 };
270 } // namespace fmt
271
272 enum unstreamable_enum {};
format_as(unstreamable_enum e)273 auto format_as(unstreamable_enum e) -> int { return e; }
274
TEST(xchar_test,enum)275 TEST(xchar_test, enum) {
276 EXPECT_EQ(L"streamable_enum", fmt::format(L"{}", streamable_enum()));
277 EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));
278 }
279
280 struct streamable_and_unformattable {};
281
operator <<(std::wostream & os,streamable_and_unformattable)282 auto operator<<(std::wostream& os, streamable_and_unformattable)
283 -> std::wostream& {
284 return os << L"foo";
285 }
286
TEST(xchar_test,streamed)287 TEST(xchar_test, streamed) {
288 EXPECT_FALSE(fmt::is_formattable<streamable_and_unformattable>());
289 EXPECT_EQ(fmt::format(L"{}", fmt::streamed(streamable_and_unformattable())),
290 L"foo");
291 }
292
TEST(xchar_test,sign_not_truncated)293 TEST(xchar_test, sign_not_truncated) {
294 wchar_t format_str[] = {
295 L'{', L':',
296 '+' | static_cast<wchar_t>(1 << fmt::detail::num_bits<char>()), L'}', 0};
297 EXPECT_THROW(fmt::format(fmt::runtime(format_str), 42), fmt::format_error);
298 }
299
TEST(xchar_test,chrono)300 TEST(xchar_test, chrono) {
301 auto tm = std::tm();
302 tm.tm_year = 116;
303 tm.tm_mon = 3;
304 tm.tm_mday = 25;
305 tm.tm_hour = 11;
306 tm.tm_min = 22;
307 tm.tm_sec = 33;
308 EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
309 "The date is 2016-04-25 11:22:33.");
310 EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds(42)));
311 EXPECT_EQ(fmt::format(L"{:%F}", tm), L"2016-04-25");
312 EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");
313 }
314
system_wcsftime(const std::wstring & format,const std::tm * timeptr,std::locale * locptr=nullptr)315 std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,
316 std::locale* locptr = nullptr) {
317 auto loc = locptr ? *locptr : std::locale::classic();
318 auto& facet = std::use_facet<std::time_put<wchar_t>>(loc);
319 std::wostringstream os;
320 os.imbue(loc);
321 facet.put(os, os, L' ', timeptr, format.c_str(),
322 format.c_str() + format.size());
323 #ifdef _WIN32
324 // Workaround a bug in older versions of Universal CRT.
325 auto str = os.str();
326 if (str == L"-0000") str = L"+0000";
327 return str;
328 #else
329 return os.str();
330 #endif
331 }
332
TEST(chrono_test_wchar,time_point)333 TEST(chrono_test_wchar, time_point) {
334 auto t1 = std::chrono::time_point_cast<std::chrono::seconds>(
335 std::chrono::system_clock::now());
336
337 std::vector<std::wstring> spec_list = {
338 L"%%", L"%n", L"%t", L"%Y", L"%EY", L"%y", L"%Oy", L"%Ey", L"%C",
339 L"%EC", L"%G", L"%g", L"%b", L"%h", L"%B", L"%m", L"%Om", L"%U",
340 L"%OU", L"%W", L"%OW", L"%V", L"%OV", L"%j", L"%d", L"%Od", L"%e",
341 L"%Oe", L"%a", L"%A", L"%w", L"%Ow", L"%u", L"%Ou", L"%H", L"%OH",
342 L"%I", L"%OI", L"%M", L"%OM", L"%S", L"%OS", L"%x", L"%Ex", L"%X",
343 L"%EX", L"%D", L"%F", L"%R", L"%T", L"%p"};
344 #ifndef _WIN32
345 // Disabled on Windows, because these formats is not consistent among
346 // platforms.
347 spec_list.insert(spec_list.end(), {L"%c", L"%Ec", L"%r"});
348 #elif !FMT_HAS_C99_STRFTIME
349 // Only C89 conversion specifiers when using MSVCRT instead of UCRT
350 spec_list = {L"%%", L"%Y", L"%y", L"%b", L"%B", L"%m", L"%U",
351 L"%W", L"%j", L"%d", L"%a", L"%A", L"%w", L"%H",
352 L"%I", L"%M", L"%S", L"%x", L"%X", L"%p"};
353 #endif
354 spec_list.push_back(L"%Y-%m-%d %H:%M:%S");
355
356 for (const auto& spec : spec_list) {
357 auto t = std::chrono::system_clock::to_time_t(t1);
358 auto tm = *std::gmtime(&t);
359
360 auto sys_output = system_wcsftime(spec, &tm);
361
362 auto fmt_spec = fmt::format(L"{{:{}}}", spec);
363 EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), t1));
364 EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));
365 }
366
367 // Timezone formatters tests makes sense for localtime.
368 #if FMT_HAS_C99_STRFTIME
369 spec_list = {L"%z", L"%Z"};
370 #else
371 spec_list = {L"%Z"};
372 #endif
373 for (const auto& spec : spec_list) {
374 auto t = std::chrono::system_clock::to_time_t(t1);
375 auto tm = *std::localtime(&t);
376
377 auto sys_output = system_wcsftime(spec, &tm);
378
379 auto fmt_spec = fmt::format(L"{{:{}}}", spec);
380 EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));
381
382 if (spec == L"%z") {
383 sys_output.insert(sys_output.end() - 2, 1, L':');
384 EXPECT_EQ(sys_output, fmt::format(L"{:%Ez}", tm));
385 EXPECT_EQ(sys_output, fmt::format(L"{:%Oz}", tm));
386 }
387 }
388
389 // Separate tests for UTC, since std::time_put can use local time and ignoring
390 // the timezone in std::tm (if it presents on platform).
391 if (fmt::detail::has_member_data_tm_zone<std::tm>::value) {
392 auto t = std::chrono::system_clock::to_time_t(t1);
393 auto tm = *std::gmtime(&t);
394
395 std::vector<std::wstring> tz_names = {L"GMT", L"UTC"};
396 EXPECT_THAT(tz_names, Contains(fmt::format(L"{:%Z}", t1)));
397 EXPECT_THAT(tz_names, Contains(fmt::format(L"{:%Z}", tm)));
398 }
399
400 if (fmt::detail::has_member_data_tm_gmtoff<std::tm>::value) {
401 auto t = std::chrono::system_clock::to_time_t(t1);
402 auto tm = *std::gmtime(&t);
403
404 EXPECT_EQ(L"+0000", fmt::format(L"{:%z}", t1));
405 EXPECT_EQ(L"+0000", fmt::format(L"{:%z}", tm));
406
407 EXPECT_EQ(L"+00:00", fmt::format(L"{:%Ez}", t1));
408 EXPECT_EQ(L"+00:00", fmt::format(L"{:%Ez}", tm));
409
410 EXPECT_EQ(L"+00:00", fmt::format(L"{:%Oz}", t1));
411 EXPECT_EQ(L"+00:00", fmt::format(L"{:%Oz}", tm));
412 }
413 }
414
TEST(xchar_test,color)415 TEST(xchar_test, color) {
416 EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),
417 L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");
418 }
419
TEST(xchar_test,ostream)420 TEST(xchar_test, ostream) {
421 #if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 409
422 {
423 std::wostringstream wos;
424 fmt::print(wos, L"Don't {}!", L"panic");
425 EXPECT_EQ(wos.str(), L"Don't panic!");
426 }
427
428 {
429 std::wostringstream wos;
430 fmt::println(wos, L"Don't {}!", L"panic");
431 EXPECT_EQ(wos.str(), L"Don't panic!\n");
432 }
433 #endif
434 }
435
TEST(xchar_test,format_map)436 TEST(xchar_test, format_map) {
437 auto m = std::map<std::wstring, int>{{L"one", 1}, {L"t\"wo", 2}};
438 EXPECT_EQ(fmt::format(L"{}", m), L"{\"one\": 1, \"t\\\"wo\": 2}");
439 }
440
TEST(xchar_test,escape_string)441 TEST(xchar_test, escape_string) {
442 using vec = std::vector<std::wstring>;
443 EXPECT_EQ(fmt::format(L"{}", vec{L"\n\r\t\"\\"}), L"[\"\\n\\r\\t\\\"\\\\\"]");
444 EXPECT_EQ(fmt::format(L"{}", vec{L"понедельник"}), L"[\"понедельник\"]");
445 }
446
TEST(xchar_test,to_wstring)447 TEST(xchar_test, to_wstring) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }
448
449 #ifndef FMT_STATIC_THOUSANDS_SEPARATOR
450
451 template <typename Char> struct numpunct : std::numpunct<Char> {
452 protected:
do_decimal_pointnumpunct453 Char do_decimal_point() const override { return '?'; }
do_groupingnumpunct454 std::string do_grouping() const override { return "\03"; }
do_thousands_sepnumpunct455 Char do_thousands_sep() const override { return '~'; }
456 };
457
458 template <typename Char> struct no_grouping : std::numpunct<Char> {
459 protected:
do_decimal_pointno_grouping460 Char do_decimal_point() const override { return '.'; }
do_groupingno_grouping461 std::string do_grouping() const override { return ""; }
do_thousands_sepno_grouping462 Char do_thousands_sep() const override { return ','; }
463 };
464
465 template <typename Char> struct special_grouping : std::numpunct<Char> {
466 protected:
do_decimal_pointspecial_grouping467 Char do_decimal_point() const override { return '.'; }
do_groupingspecial_grouping468 std::string do_grouping() const override { return "\03\02"; }
do_thousands_sepspecial_grouping469 Char do_thousands_sep() const override { return ','; }
470 };
471
472 template <typename Char> struct small_grouping : std::numpunct<Char> {
473 protected:
do_decimal_pointsmall_grouping474 Char do_decimal_point() const override { return '.'; }
do_groupingsmall_grouping475 std::string do_grouping() const override { return "\01"; }
do_thousands_sepsmall_grouping476 Char do_thousands_sep() const override { return ','; }
477 };
478
TEST(locale_test,localized_double)479 TEST(locale_test, localized_double) {
480 auto loc = std::locale(std::locale(), new numpunct<char>());
481 EXPECT_EQ(fmt::format(loc, "{:L}", 1.23), "1?23");
482 EXPECT_EQ(fmt::format(loc, "{:Lf}", 1.23), "1?230000");
483 EXPECT_EQ(fmt::format(loc, "{:L}", 1234.5), "1~234?5");
484 EXPECT_EQ(fmt::format(loc, "{:L}", 12000.0), "12~000");
485 EXPECT_EQ(fmt::format(loc, "{:8L}", 1230.0), " 1~230");
486 EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 0.1), " 0?100000");
487 EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 1.0), " 1?000000");
488 EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 1e3), " 1~000?000000");
489 }
490
TEST(locale_test,format)491 TEST(locale_test, format) {
492 auto loc = std::locale(std::locale(), new numpunct<char>());
493 EXPECT_EQ("1234567", fmt::format(std::locale(), "{:L}", 1234567));
494 EXPECT_EQ("1~234~567", fmt::format(loc, "{:L}", 1234567));
495 EXPECT_EQ("-1~234~567", fmt::format(loc, "{:L}", -1234567));
496 EXPECT_EQ("-256", fmt::format(loc, "{:L}", -256));
497 auto n = 1234567;
498 EXPECT_EQ("1~234~567", fmt::vformat(loc, "{:L}", fmt::make_format_args(n)));
499 auto s = std::string();
500 fmt::format_to(std::back_inserter(s), loc, "{:L}", 1234567);
501 EXPECT_EQ("1~234~567", s);
502
503 auto no_grouping_loc = std::locale(std::locale(), new no_grouping<char>());
504 EXPECT_EQ("1234567", fmt::format(no_grouping_loc, "{:L}", 1234567));
505
506 auto special_grouping_loc =
507 std::locale(std::locale(), new special_grouping<char>());
508 EXPECT_EQ("1,23,45,678", fmt::format(special_grouping_loc, "{:L}", 12345678));
509 EXPECT_EQ("12,345", fmt::format(special_grouping_loc, "{:L}", 12345));
510
511 auto small_grouping_loc =
512 std::locale(std::locale(), new small_grouping<char>());
513 EXPECT_EQ("4,2,9,4,9,6,7,2,9,5",
514 fmt::format(small_grouping_loc, "{:L}", max_value<uint32_t>()));
515 }
516
TEST(locale_test,format_detault_align)517 TEST(locale_test, format_detault_align) {
518 auto loc = std::locale({}, new special_grouping<char>());
519 EXPECT_EQ(" 12,345", fmt::format(loc, "{:8L}", 12345));
520 }
521
TEST(locale_test,format_plus)522 TEST(locale_test, format_plus) {
523 auto loc = std::locale({}, new special_grouping<char>());
524 EXPECT_EQ("+100", fmt::format(loc, "{:+L}", 100));
525 }
526
TEST(locale_test,wformat)527 TEST(locale_test, wformat) {
528 auto loc = std::locale(std::locale(), new numpunct<wchar_t>());
529 EXPECT_EQ(L"1234567", fmt::format(std::locale(), L"{:L}", 1234567));
530 EXPECT_EQ(L"1~234~567", fmt::format(loc, L"{:L}", 1234567));
531 int n = 1234567;
532 EXPECT_EQ(L"1~234~567",
533 fmt::vformat(loc, L"{:L}", fmt::make_wformat_args(n)));
534 EXPECT_EQ(L"1234567", fmt::format(std::locale("C"), L"{:L}", 1234567));
535
536 auto no_grouping_loc = std::locale(std::locale(), new no_grouping<wchar_t>());
537 EXPECT_EQ(L"1234567", fmt::format(no_grouping_loc, L"{:L}", 1234567));
538
539 auto special_grouping_loc =
540 std::locale(std::locale(), new special_grouping<wchar_t>());
541 EXPECT_EQ(L"1,23,45,678",
542 fmt::format(special_grouping_loc, L"{:L}", 12345678));
543
544 auto small_grouping_loc =
545 std::locale(std::locale(), new small_grouping<wchar_t>());
546 EXPECT_EQ(L"4,2,9,4,9,6,7,2,9,5",
547 fmt::format(small_grouping_loc, L"{:L}", max_value<uint32_t>()));
548 }
549
TEST(locale_test,int_formatter)550 TEST(locale_test, int_formatter) {
551 auto loc = std::locale(std::locale(), new special_grouping<char>());
552 auto f = fmt::formatter<int>();
553 auto parse_ctx = fmt::format_parse_context("L");
554 f.parse(parse_ctx);
555 auto buf = fmt::memory_buffer();
556 fmt::basic_format_context<fmt::appender, char> format_ctx(
557 fmt::appender(buf), {}, fmt::detail::locale_ref(loc));
558 f.format(12345, format_ctx);
559 EXPECT_EQ(fmt::to_string(buf), "12,345");
560 }
561
562 FMT_BEGIN_NAMESPACE
563 template <class charT> struct formatter<std::complex<double>, charT> {
564 private:
565 detail::dynamic_format_specs<char> specs_;
566
567 public:
parseformatter568 FMT_CONSTEXPR typename basic_format_parse_context<charT>::iterator parse(
569 basic_format_parse_context<charT>& ctx) {
570 auto end = parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
571 detail::type::float_type);
572 detail::parse_float_type_spec(specs_);
573 return end;
574 }
575
576 template <class FormatContext>
formatformatter577 typename FormatContext::iterator format(const std::complex<double>& c,
578 FormatContext& ctx) {
579 detail::handle_dynamic_spec<detail::precision_checker>(
580 specs_.precision, specs_.precision_ref, ctx);
581 auto specs = std::string();
582 if (specs_.precision > 0) specs = fmt::format(".{}", specs_.precision);
583 if (specs_.type == presentation_type::fixed_lower) specs += 'f';
584 auto real = fmt::format(ctx.locale().template get<std::locale>(),
585 fmt::runtime("{:" + specs + "}"), c.real());
586 auto imag = fmt::format(ctx.locale().template get<std::locale>(),
587 fmt::runtime("{:" + specs + "}"), c.imag());
588 auto fill_align_width = std::string();
589 if (specs_.width > 0) fill_align_width = fmt::format(">{}", specs_.width);
590 return fmt::format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
591 c.real() != 0 ? fmt::format("({}+{}i)", real, imag)
592 : fmt::format("{}i", imag));
593 }
594 };
595 FMT_END_NAMESPACE
596
TEST(locale_test,complex)597 TEST(locale_test, complex) {
598 std::string s = fmt::format("{}", std::complex<double>(1, 2));
599 EXPECT_EQ(s, "(1+2i)");
600 EXPECT_EQ(fmt::format("{:.2f}", std::complex<double>(1, 2)), "(1.00+2.00i)");
601 EXPECT_EQ(fmt::format("{:8}", std::complex<double>(1, 2)), " (1+2i)");
602 }
603
TEST(locale_test,chrono_weekday)604 TEST(locale_test, chrono_weekday) {
605 auto loc = get_locale("es_ES.UTF-8", "Spanish_Spain.1252");
606 auto loc_old = std::locale::global(loc);
607 auto sat = fmt::weekday(6);
608 EXPECT_EQ(fmt::format(L"{}", sat), L"Sat");
609 if (loc != std::locale::classic()) {
610 // L'\xE1' is 'á'.
611 auto saturdays = std::vector<std::wstring>{L"s\xE1""b", L"s\xE1."};
612 EXPECT_THAT(saturdays, Contains(fmt::format(loc, L"{:L}", sat)));
613 }
614 std::locale::global(loc_old);
615 }
616
TEST(locale_test,sign)617 TEST(locale_test, sign) {
618 EXPECT_EQ(fmt::format(std::locale(), L"{:L}", -50), L"-50");
619 }
620
TEST(std_test_xchar,optional)621 TEST(std_test_xchar, optional) {
622 # ifdef __cpp_lib_optional
623 EXPECT_EQ(fmt::format(L"{}", std::optional{L'C'}), L"optional(\'C\')");
624 EXPECT_EQ(fmt::format(L"{}", std::optional{std::wstring{L"wide string"}}),
625 L"optional(\"wide string\")");
626 # endif
627 }
628
629 #endif // FMT_STATIC_THOUSANDS_SEPARATOR
630