576 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++2010// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME11 12// This version runs the test when the platform has Unicode support.13// UNSUPPORTED: libcpp-has-no-unicode14 15// TODO FMT This test should not require std::to_chars(floating-point)16// XFAIL: availability-fp_to_chars-missing17 18// <format>19 20// This test the debug string type for the formatter specializations for char21// and string types. This tests Unicode strings.22 23#include <format>24 25#include <cassert>26#include <concepts>27#include <cstdint>28#include <iterator>29#include <list>30#include <vector>31 32#include "test_macros.h"33#include "make_string.h"34#include "test_format_string.h"35#include "assert_macros.h"36#include "concat_macros.h"37 38#ifndef TEST_HAS_NO_LOCALIZATION39# include <iostream>40#endif41 42#define SV(S) MAKE_STRING_VIEW(CharT, S)43 44auto test_format = []<class CharT, class... Args>(45 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) {46 {47 std::basic_string<CharT> out = std::format(fmt, std::forward<Args>(args)...);48 TEST_REQUIRE(out == expected,49 TEST_WRITE_CONCATENATED(50 "\nFormat string ", fmt.get(), "\nExpected output ", expected, "\nActual output ", out, '\n'));51 }52#ifndef TEST_HAS_NO_LOCALIZATION53 {54 std::basic_string<CharT> out = std::format(std::locale(), fmt, std::forward<Args>(args)...);55 assert(out == expected);56 }57#endif // TEST_HAS_NO_LOCALIZATION58};59 60auto test_format_to =61 []<class CharT, class... Args>(62 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) {63 {64 std::basic_string<CharT> out(expected.size(), CharT(' '));65 auto it = std::format_to(out.begin(), fmt, std::forward<Args>(args)...);66 assert(it == out.end());67 assert(out == expected);68 }69#ifndef TEST_HAS_NO_LOCALIZATION70 {71 std::basic_string<CharT> out(expected.size(), CharT(' '));72 auto it = std::format_to(out.begin(), std::locale(), fmt, std::forward<Args>(args)...);73 assert(it == out.end());74 assert(out == expected);75 }76#endif // TEST_HAS_NO_LOCALIZATION77 {78 std::list<CharT> out;79 std::format_to(std::back_inserter(out), fmt, std::forward<Args>(args)...);80 assert(std::equal(out.begin(), out.end(), expected.begin(), expected.end()));81 }82 {83 std::vector<CharT> out;84 std::format_to(std::back_inserter(out), fmt, std::forward<Args>(args)...);85 assert(std::equal(out.begin(), out.end(), expected.begin(), expected.end()));86 }87 {88 assert(expected.size() < 4096 && "Update the size of the buffer.");89 CharT out[4096];90 CharT* it = std::format_to(out, fmt, std::forward<Args>(args)...);91 assert(std::distance(out, it) == int(expected.size()));92 // Convert to std::string since output contains '\0' for boolean tests.93 assert(std::basic_string<CharT>(out, it) == expected);94 }95 };96 97auto test_formatted_size =98 []<class CharT, class... Args>(99 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) {100 {101 std::size_t size = std::formatted_size(fmt, std::forward<Args>(args)...);102 assert(size == expected.size());103 }104#ifndef TEST_HAS_NO_LOCALIZATION105 {106 std::size_t size = std::formatted_size(std::locale(), fmt, std::forward<Args>(args)...);107 assert(size == expected.size());108 }109#endif // TEST_HAS_NO_LOCALIZATION110 };111 112auto test_format_to_n =113 []<class CharT, class... Args>(114 std::basic_string_view<CharT> expected, test_format_string<CharT, Args...> fmt, Args&&... args) {115 {116 std::size_t n = expected.size();117 std::basic_string<CharT> out(n, CharT(' '));118 std::format_to_n_result result = std::format_to_n(out.begin(), n, fmt, std::forward<Args>(args)...);119 assert(result.size == static_cast<std::ptrdiff_t>(expected.size()));120 assert(result.out == out.end());121 assert(out == expected);122 }123#ifndef TEST_HAS_NO_LOCALIZATION124 {125 std::size_t n = expected.size();126 std::basic_string<CharT> out(n, CharT(' '));127 std::format_to_n_result result =128 std::format_to_n(out.begin(), n, std::locale(), fmt, std::forward<Args>(args)...);129 assert(result.size == static_cast<std::ptrdiff_t>(expected.size()));130 assert(result.out == out.end());131 assert(out == expected);132 }133#endif // TEST_HAS_NO_LOCALIZATION134 {135 std::ptrdiff_t n = 0;136 std::basic_string<CharT> out;137 std::format_to_n_result result = std::format_to_n(out.begin(), n, fmt, std::forward<Args>(args)...);138 assert(result.size == static_cast<std::ptrdiff_t>(expected.size()));139 assert(result.out == out.end());140 assert(out.empty());141 }142 {143 std::ptrdiff_t n = expected.size() / 2;144 std::basic_string<CharT> out(n, CharT(' '));145 std::format_to_n_result result = std::format_to_n(out.begin(), n, fmt, std::forward<Args>(args)...);146 assert(result.size == static_cast<std::ptrdiff_t>(expected.size()));147 assert(result.out == out.end());148 assert(out == expected.substr(0, n));149 }150 };151 152template <class CharT>153void test_char() {154 // *** P2286 examples ***155 test_format(SV("['\\'', '\"']"), SV("[{:?}, {:?}]"), CharT('\''), CharT('"'));156 157 // *** Special cases ***158 test_format(SV("'\\t'"), SV("{:?}"), CharT('\t'));159 test_format(SV("'\\n'"), SV("{:?}"), CharT('\n'));160 test_format(SV("'\\r'"), SV("{:?}"), CharT('\r'));161 test_format(SV("'\\\\'"), SV("{:?}"), CharT('\\'));162 163 test_format(SV("'\\\''"), SV("{:?}"), CharT('\''));164 test_format(SV("'\"'"), SV("{:?}"), CharT('"')); // only special for string165 166 test_format(SV("' '"), SV("{:?}"), CharT(' '));167 168 // *** Printable ***169 test_format(SV("'a'"), SV("{:?}"), CharT('a'));170 test_format(SV("'b'"), SV("{:?}"), CharT('b'));171 test_format(SV("'c'"), SV("{:?}"), CharT('c'));172 173 // *** Non-printable ***174 175 // Control176 test_format(SV("'\\u{0}'"), SV("{:?}"), CharT('\0'));177 test_format(SV("'\\u{1f}'"), SV("{:?}"), CharT('\x1f'));178 179 // Ill-formed180 if constexpr (sizeof(CharT) == 1)181 test_format(SV("'\\x{80}'"), SV("{:?}"), CharT('\x80'));182 183#ifndef TEST_HAS_NO_WIDE_CHARACTERS184 if constexpr (sizeof(CharT) > 1) {185 using V = std::basic_string_view<CharT>;186 187 // Unicode fitting in a 16-bit wchar_t188 189 // *** Non-printable ***190 191 // Space_Separator192 test_format(V{L"'\\u{a0}'"}, L"{:?}", L'\xa0'); // NO-BREAK SPACE193 test_format(V{L"'\\u{3000}'"}, L"{:?}", L'\x3000'); // IDEOGRAPHIC SPACE194 195 // Line_Separator196 test_format(V{L"'\\u{2028}'"}, L"{:?}", L'\x2028'); // LINE SEPARATOR197 198 // Paragraph_Separator199 test_format(V{L"'\\u{2029}'"}, L"{:?}", L'\x2029'); // PARAGRAPH SEPARATOR200 201 // Format202 test_format(V{L"'\\u{ad}'"}, L"{:?}", L'\xad'); // SOFT HYPHEN203 test_format(V{L"'\\u{600}'"}, L"{:?}", L'\x600'); // ARABIC NUMBER SIGN204 test_format(V{L"'\\u{feff}'"}, L"{:?}", L'\xfeff'); // ZERO WIDTH NO-BREAK SPACE205 206 // Incomplete surrogate pair in UTF-16207 test_format(V{L"'\\x{d800}'"}, L"{:?}", L'\xd800'); // <surrogate-D800>208 test_format(V{L"'\\x{dfff}'"}, L"{:?}", L'\xdfff'); // <surrogate-DFFF>209 210 // Private_Use211 test_format(V{L"'\\u{e000}'"}, L"{:?}", L'\xe000'); // <private-use-E000>212 test_format(V{L"'\\u{f8ff}'"}, L"{:?}", L'\xf8ff'); // <private-use-F8FF>213 214 // Unassigned215 test_format(V{L"'\\u{378}'"}, L"{:?}", L'\x378'); // <reserved-0378>216 test_format(V{L"'\\u{1774}'"}, L"{:?}", L'\x1774'); // <reserved-1774>217 test_format(V{L"'\\u{ffff}'"}, L"{:?}", L'\xffff'); // <noncharacter-FFFF>218 219 // Grapheme Extended220 test_format(V{L"'\\u{300}'"}, L"{:?}", L'\x300'); // COMBINING GRAVE ACCENT221 test_format(V{L"'\\u{fe20}'"}, L"{:?}", L'\xfe20'); // VARIATION SELECTOR-1222 }223# ifndef TEST_SHORT_WCHAR224 if constexpr (sizeof(CharT) > 2) {225 static_assert(sizeof(CharT) == 4, "add support for unexpected size");226 // Unicode fitting in a 32-bit wchar_t227 228 constexpr wchar_t x = 0x1ffff;229 constexpr std::uint32_t y = 0x1ffff;230 static_assert(x == y);231 232 using V = std::basic_string_view<CharT>;233 234 // *** Non-printable ***235 // Format236 test_format(V{L"'\\u{110bd}'"}, L"{:?}", L'\x110bd'); // KAITHI NUMBER SIGN237 test_format(V{L"'\\u{e007f}'"}, L"{:?}", L'\xe007f'); // CANCEL TAG238 239 // Private_Use240 test_format(V{L"'\\u{f0000}'"}, L"{:?}", L'\xf0000'); // <private-use-F0000>241 test_format(V{L"'\\u{ffffd}'"}, L"{:?}", L'\xffffd'); // <private-use-FFFFD>242 243 test_format(V{L"'\\u{100000}'"}, L"{:?}", L'\x100000'); // <private-use-100000>244 test_format(V{L"'\\u{10fffd}'"}, L"{:?}", L'\x10fffd'); // <private-use-10FFFD>245 246 // Unassigned247 test_format(V{L"'\\u{1000c}'"}, L"{:?}", L'\x1000c'); // <reserved-1000c>248 test_format(V{L"'\\u{fffff}'"}, L"{:?}", L'\xfffff'); // <noncharacter-FFFFF>249 test_format(V{L"'\\u{10fffe}'"}, L"{:?}", L'\x10fffe'); // <noncharacter-10FFFE>250 251 // Grapheme Extended252 test_format(V{L"'\\u{101fd}'"}, L"{:?}", L'\x101fd'); // COMBINING OLD PERMIC LETTER AN253 test_format(V{L"'\\u{e0100}'"}, L"{:?}", L'\xe0100'); // VARIATION SELECTOR-17254 255 // Ill-formed256 test_format(V{L"'\\x{110000}'"}, L"{:?}", L'\x110000');257 test_format(V{L"'\\x{ffffffff}'"}, L"{:?}", L'\xffffffff');258 }259# endif // TEST_SHORT_WCHAR260#endif // TEST_HAS_NO_WIDE_CHARACTERS261}262 263template <class CharT>264void test_string() {265 // *** P2286 examples ***266 test_format(SV("[h\tllo]"), SV("[{}]"), SV("h\tllo"));267 test_format(SV(R"(["h\tllo"])"), SV("[{:?}]"), SV("h\tllo"));268 test_format(SV(R"(["Спасибо, Виктор ♥!"])"), SV("[{:?}]"), SV("Спасибо, Виктор ♥!"));269 270 test_format(SV(R"(["\u{0} \n \t \u{2} \u{1b}"])"), SV("[{:?}]"), SV("\0 \n \t \x02 \x1b"));271 272 if constexpr (sizeof(CharT) == 1) {273 // Ill-formend UTF-8274 test_format(SV(R"(["\x{c3}"])"), SV("[{:?}]"), "\xc3");275 test_format(SV(R"(["\x{c3}("])"), SV("[{:?}]"), "\xc3\x28");276 277 /* U+0000..U+0007F 1 code unit range, encoded in 2 code units. */278 test_format(SV(R"(["\x{c0}\x{80}"])"), SV("[{:?}]"), "\xc0\x80"); // U+0000279 test_format(SV(R"(["\x{c1}\x{bf}"])"), SV("[{:?}]"), "\xc1\xbf"); // U+007F280 test_format(SV(R"(["\u{80}"])"), SV("[{:?}]"), "\xc2\x80"); // U+0080 first valid (General_Category=Control)281 282 /* U+0000..U+07FFF 1 and 2 code unit range, encoded in 3 code units. */283 test_format(SV(R"(["\x{e0}\x{80}\x{80}"])"), SV("[{:?}]"), "\xe0\x80\x80"); // U+0000284 test_format(SV(R"(["\x{e0}\x{81}\x{bf}"])"), SV("[{:?}]"), "\xe0\x81\xbf"); // U+007F285 test_format(SV(R"(["\x{e0}\x{82}\x{80}"])"), SV("[{:?}]"), "\xe0\x82\x80"); // U+0080286 test_format(SV(R"(["\x{e0}\x{9f}\x{bf}"])"), SV("[{:?}]"), "\xe0\x9f\xbf"); // U+07FF287 test_format(SV("[\"\u0800\"]"), SV("[{:?}]"), "\xe0\xa0\x80"); // U+0800 first valid288 289#if 0290 // This code point is in the Hangul Jamo Extended-B block and at the time of writing291 // it's unassigned. When it comes defined, this branch might become true.292 test_format(SV("[\"\ud7ff\"]"), SV("[{:?}]"), "\xed\x9f\xbf"); // U+D7FF last valid293#else294 /* U+D800..D+DFFFF surrogate range */295 test_format(SV(R"(["\u{d7ff}"])"), SV("[{:?}]"), "\xed\x9f\xbf"); // U+D7FF last valid296#endif297 test_format(SV(R"(["\x{ed}\x{a0}\x{80}"])"), SV("[{:?}]"), "\xed\xa0\x80"); // U+D800298 test_format(SV(R"(["\x{ed}\x{af}\x{bf}"])"), SV("[{:?}]"), "\xed\xaf\xbf"); // U+DBFF299 test_format(SV(R"(["\x{ed}\x{bf}\x{80}"])"), SV("[{:?}]"), "\xed\xbf\x80"); // U+DC00300 test_format(SV(R"(["\x{ed}\x{bf}\x{bf}"])"), SV("[{:?}]"), "\xed\xbf\xbf"); // U+DFFF301 test_format(SV(R"(["\u{e000}"])"), SV("[{:?}]"), "\xee\x80\x80"); // U+E000 first valid302 // (in the Private Use Area block)303 304 /* U+0000..U+FFFF 1, 2, and 3 code unit range */305 test_format(SV(R"(["\x{f0}\x{80}\x{80}\x{80}"])"), SV("[{:?}]"), "\xf0\x80\x80\x80"); // U+0000306 test_format(SV(R"(["\x{f0}\x{80}\x{81}\x{bf}"])"), SV("[{:?}]"), "\xf0\x80\x81\xbf"); // U+007F307 test_format(SV(R"(["\x{f0}\x{80}\x{82}\x{80}"])"), SV("[{:?}]"), "\xf0\x80\x82\x80"); // U+0080308 test_format(SV(R"(["\x{f0}\x{80}\x{9f}\x{bf}"])"), SV("[{:?}]"), "\xf0\x80\x9f\xbf"); // U+07FF309 test_format(SV(R"(["\x{f0}\x{80}\x{a0}\x{80}"])"), SV("[{:?}]"), "\xf0\x80\xa0\x80"); // U+0800310 test_format(SV(R"(["\x{f0}\x{8f}\x{bf}\x{bf}"])"), SV("[{:?}]"), "\xf0\x8f\xbf\xbf"); // U+FFFF311 test_format(SV("[\"\U00010000\"]"), SV("[{:?}]"), "\xf0\x90\x80\x80"); // U+10000 first valid312 313 /* U+10FFFF..U+1FFFFF invalid range */314 test_format(SV(R"(["\u{10ffff}"])"), SV("[{:?}]"), "\xf4\x8f\xbf\xbf"); // U+10FFFF last valid315 // (in Supplementary Private Use Area-B)316 test_format(SV(R"(["\x{f4}\x{90}\x{80}\x{80}"])"), SV("[{:?}]"), "\xf4\x90\x80\x80"); // U+110000317 test_format(SV(R"(["\x{f4}\x{bf}\x{bf}\x{bf}"])"), SV("[{:?}]"), "\xf4\xbf\xbf\xbf"); // U+11FFFF318 } else {319 // Valid UTF-16 and UTF-32320 test_format(SV("[\"\u00c3\"]"), SV("[{:?}]"), L"\xc3"); // LATIN CAPITAL LETTER A WITH TILDE321 test_format(SV("[\"\u00c3(\"]"), SV("[{:?}]"), L"\xc3\x28");322 }323 324 // LWG-3965325 test_format(SV(R"(["🤷🏻\u{200d}♂️"])"), SV("[{:?}]"), SV("🤷🏻♂️"));326 327 // *** Special cases ***328 test_format(SV(R"("\t\n\r\\'\" ")"), SV("{:?}"), SV("\t\n\r\\'\" "));329 330 // *** Printable ***331 test_format(SV(R"("abcdefg")"), SV("{:?}"), SV("abcdefg"));332 333 // *** Non-printable ***334 335 // Control336 test_format(SV(R"("\u{0}\u{1f}")"), SV("{:?}"), SV("\0\x1f"));337 338 // Ill-formed339 if constexpr (sizeof(CharT) == 1)340 test_format(SV(R"("\x{80}")"), SV("{:?}"), "\x80");341 342 // *** P2713R1 examples ***343 test_format(SV(R"(["\u{301}"])"), SV("[{:?}]"), SV("\u0301"));344 test_format(SV(R"(["\\\u{301}"])"), SV("[{:?}]"), SV("\\\u0301"));345 test_format(SV(R"(["ẹ́"])"), SV("[{:?}]"), SV("e\u0301\u0323"));346 347#ifndef TEST_HAS_NO_WIDE_CHARACTERS348 if constexpr (sizeof(CharT) > 1) {349 using V = std::basic_string_view<CharT>;350 351 // Unicode fitting in a 16-bit wchar_t352 353 // *** Non-printable ***354 355 // Space_Separator356 test_format(V{LR"("\u{a0}\u{3000}")"}, L"{:?}", L"\xa0\x3000");357 358 // Line_Separator359 test_format(V{LR"("\u{2028}")"}, L"{:?}", L"\x2028"); // LINE SEPARATOR360 361 // Paragraph_Separator362 test_format(V{LR"("\u{2029}")"}, L"{:?}", L"\x2029"); // PARAGRAPH SEPARATOR363 364 // Format365 test_format(V{LR"("\u{ad}\u{600}\u{feff}")"}, L"{:?}", L"\xad\x600\xfeff");366 367 // Incomplete surrogate pair in UTF-16368 test_format(V{LR"("\x{d800}")"}, L"{:?}", L"\xd800");369 370 // Private_Use371 test_format(V{LR"("\u{e000}\u{f8ff}")"}, L"{:?}", L"\xe000\xf8ff");372 373 // Unassigned374 test_format(V{LR"("\u{378}\u{1774}\u{ffff}")"}, L"{:?}", L"\x378\x1774\xffff");375 376 // Grapheme Extended377 test_format(V{LR"("\u{300}\u{fe20}")"}, L"{:?}", L"\x300\xfe20");378 }379# ifndef TEST_SHORT_WCHAR380 if constexpr (sizeof(CharT) > 2) {381 static_assert(sizeof(CharT) == 4, "add support for unexpected size");382 // Unicode fitting in a 32-bit wchar_t383 384 constexpr wchar_t x = 0x1ffff;385 constexpr std::uint32_t y = 0x1ffff;386 static_assert(x == y);387 388 using V = std::basic_string_view<CharT>;389 390 // *** Non-printable ***391 // Format392 test_format(V{LR"("\u{110bd}\u{e007f}")"}, L"{:?}", L"\x110bd\xe007f");393 394 // Private_Use395 test_format(V{LR"("\u{f0000}\u{ffffd}\u{100000}\u{10fffd}")"}, L"{:?}", L"\xf0000\xffffd\x100000\x10fffd");396 397 // Unassigned398 test_format(V{LR"("\u{1000c}\u{fffff}\u{10fffe}")"}, L"{:?}", L"\x1000c\xfffff\x10fffe");399 400 // Grapheme Extended401 test_format(V{LR"("\u{101fd}\u{e0100}")"}, L"{:?}", L"\x101fd\xe0100");402 403 // Ill-formed404 test_format(V{LR"("\x{110000}\x{ffffffff}")"}, L"{:?}", L"\x110000\xffffffff");405 }406# endif // TEST_SHORT_WCHAR407#endif // TEST_HAS_NO_WIDE_CHARACTERS408}409 410template <class CharT, class TestFunction>411void test_format_functions(TestFunction check) {412 // *** align-fill & width ***413 check(SV(R"(***"hellö")"), SV("{:*>10?}"), SV("hellö")); // ö is LATIN SMALL LETTER O WITH DIAERESIS414 check(SV(R"(*"hellö"**)"), SV("{:*^10?}"), SV("hellö"));415 check(SV(R"("hellö"***)"), SV("{:*<10?}"), SV("hellö"));416 417 check(SV(R"(***"hellö")"), SV("{:*>10?}"), SV("hello\u0308"));418 check(SV(R"(*"hellö"**)"), SV("{:*^10?}"), SV("hello\u0308"));419 check(SV(R"("hellö"***)"), SV("{:*<10?}"), SV("hello\u0308"));420 421 check(SV(R"(***"hello 🤷🏻\u{200d}♂️")"), SV("{:*>22?}"), SV("hello 🤷🏻♂️"));422 check(SV(R"(*"hello 🤷🏻\u{200d}♂️"**)"), SV("{:*^22?}"), SV("hello 🤷🏻♂️"));423 check(SV(R"("hello 🤷🏻\u{200d}♂️"***)"), SV("{:*<22?}"), SV("hello 🤷🏻♂️"));424 425 // *** width ***426 check(SV(R"("hellö" )"), SV("{:10?}"), SV("hellö"));427 check(SV(R"("hellö" )"), SV("{:10?}"), SV("hello\u0308"));428 check(SV(R"("hello 🤷🏻\u{200d}♂️" )"), SV("{:22?}"), SV("hello 🤷🏻♂️"));429 430 // *** precision ***431 check(SV(R"("hell)"), SV("{:.5?}"), SV("hellö"));432 check(SV(R"("hellö)"), SV("{:.6?}"), SV("hellö"));433 check(SV(R"("hellö")"), SV("{:.7?}"), SV("hellö"));434 435 check(SV(R"("hello )"), SV("{:.7?}"), SV("hello 🤷🏻♂️"));436 check(SV(R"("hello )"), SV("{:.8?}"), SV("hello 🤷🏻♂️")); // shrug is two columns437 check(SV(R"("hello 🤷🏻)"), SV("{:.9?}"), SV("hello 🤷🏻♂️"));438 check(SV(R"("hello 🤷🏻\)"), SV("{:.10?}"), SV("hello 🤷🏻♂️"));439 check(SV(R"("hello 🤷🏻\u{200d})"), SV("{:.17?}"), SV("hello 🤷🏻♂️"));440 check(SV(R"("hello 🤷🏻\u{200d}♂️)"), SV("{:.18?}"), SV("hello 🤷🏻♂️"));441 check(SV(R"("hello 🤷🏻\u{200d}♂️")"), SV("{:.19?}"), SV("hello 🤷🏻♂️"));442 443 // *** width & precision ***444 check(SV(R"("hell#########################)"), SV("{:#<30.5?}"), SV("hellö"));445 check(SV(R"("hellö########################)"), SV("{:#<30.6?}"), SV("hellö"));446 check(SV(R"("hellö"#######################)"), SV("{:#<30.7?}"), SV("hellö"));447 448 check(SV(R"("hello #######################)"), SV("{:#<30.7?}"), SV("hello 🤷🏻♂️"));449 check(SV(R"("hello #######################)"), SV("{:#<30.8?}"), SV("hello 🤷🏻♂️"));450 check(SV(R"("hello 🤷🏻#####################)"), SV("{:#<30.9?}"), SV("hello 🤷🏻♂️"));451 check(SV(R"("hello 🤷🏻\####################)"), SV("{:#<30.10?}"), SV("hello 🤷🏻♂️"));452 check(SV(R"("hello 🤷🏻\u{200d}#############)"), SV("{:#<30.17?}"), SV("hello 🤷🏻♂️"));453 check(SV(R"("hello 🤷🏻\u{200d}♂️############)"), SV("{:#<30.18?}"), SV("hello 🤷🏻♂️"));454 check(SV(R"("hello 🤷🏻\u{200d}♂️"###########)"), SV("{:#<30.19?}"), SV("hello 🤷🏻♂️"));455}456 457template <class CharT>458void test() {459 test_char<CharT>();460 test_string<CharT>();461 462 test_format_functions<CharT>(test_format);463 test_format_functions<CharT>(test_format_to);464 test_format_functions<CharT>(test_formatted_size);465 test_format_functions<CharT>(test_format_to_n);466}467 468static void test_ill_formed_utf8() {469 using namespace std::literals;470 471 // Too few code units472 test_format(R"("\x{df}")"sv, "{:?}", "\xdf");473 test_format(R"("\x{ef}")"sv, "{:?}", "\xef");474 test_format(R"("\x{ef}\x{bf}")"sv, "{:?}", "\xef\xbf");475 test_format(R"("\x{f7}")"sv, "{:?}", "\xf7");476 test_format(R"("\x{f7}\x{bf}")"sv, "{:?}", "\xf7\xbf");477 test_format(R"("\x{f7}\x{bf}\x{bf}")"sv, "{:?}", "\xf7\xbf\xbf");478 479 // Invalid continuation byte480 test_format(R"("\x{df}a")"sv,481 "{:?}",482 "\xdf"483 "a");484 test_format(R"("\x{ef}a")"sv,485 "{:?}",486 "\xef"487 "a");488 test_format(R"("\x{ef}\x{bf}a")"sv,489 "{:?}",490 "\xef\xbf"491 "a");492 test_format(R"("\x{f7}a")"sv,493 "{:?}",494 "\xf7"495 "a");496 test_format(R"("\x{f7}\x{bf}a")"sv,497 "{:?}",498 "\xf7\xbf"499 "a");500 test_format(R"("\x{f7}\x{bf}\x{bf}a")"sv,501 "{:?}",502 "\xf7\xbf\xbf"503 "a");504 505 test_format(R"("a\x{f1}\x{80}\x{80}\x{e1}\x{80}\x{c2}b")"sv,506 "{:?}",507 "a"508 "\xf1\x80\x80\xe1\x80\xc2"509 "b");510 511 // Code unit out of range512 test_format(R"("\u{10ffff}")"sv, "{:?}", "\xf4\x8f\xbf\xbf"); // last valid code point513 test_format(R"("\x{f4}\x{90}\x{80}\x{80}")"sv, "{:?}", "\xf4\x90\x80\x80"); // first invalid code point514 test_format(R"("\x{f5}\x{b1}\x{b2}\x{b3}")"sv, "{:?}", "\xf5\xb1\xb2\xb3");515 test_format(R"("\x{f7}\x{bf}\x{bf}\x{bf}")"sv, "{:?}", "\xf7\xbf\xbf\xbf"); // largest encoded code point516}517 518#ifndef TEST_HAS_NO_WIDE_CHARACTERS519# ifdef TEST_SHORT_WCHAR520static void test_ill_formed_utf16() {521 using namespace std::literals;522 523 // Too few code units524 test_format(LR"("\x{d800}")"sv, L"{:?}", L"\xd800");525 test_format(LR"("\x{dbff}")"sv, L"{:?}", L"\xdbff");526 527 // Start with low surrogate pair528 test_format(LR"("\x{dc00}a")"sv,529 L"{:?}",530 L"\xdc00"531 "a");532 test_format(LR"("\x{dfff}a")"sv,533 L"{:?}",534 L"\xdfff"535 "a");536 537 // Only high surrogate pair538 test_format(LR"("\x{d800}a")"sv,539 L"{:?}",540 L"\xd800"541 "a");542 test_format(LR"("\x{dbff}a")"sv,543 L"{:?}",544 L"\xdbff"545 "a");546}547# else // TEST_SHORT_WCHAR548static void test_ill_formed_utf32() {549 using namespace std::literals;550 551 test_format(LR"("\u{10ffff}")"sv, L"{:?}", L"\x10ffff"); // last valid code point552 test_format(LR"("\x{110000}")"sv, L"{:?}", L"\x110000"); // first invalid code point553 test_format(LR"("\x{ffffffff}")"sv, L"{:?}", L"\xffffffff"); // largest encoded code point554}555 556# endif // TEST_SHORT_WCHAR557#endif // TEST_HAS_NO_WIDE_CHARACTERS558 559int main(int, char**) {560 test<char>();561#ifndef TEST_HAS_NO_WIDE_CHARACTERS562 test<wchar_t>();563#endif564 565 test_ill_formed_utf8();566#ifndef TEST_HAS_NO_WIDE_CHARACTERS567# ifdef TEST_SHORT_WCHAR568 test_ill_formed_utf16();569# else // TEST_SHORT_WCHAR570 test_ill_formed_utf32();571# endif // TEST_SHORT_WCHAR572#endif // TEST_HAS_NO_WIDE_CHARACTERS573 574 return 0;575}576