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| author | Mitja Felicijan <mitja.felicijan@gmail.com> | 2026-01-21 22:52:54 +0100 |
|---|---|---|
| committer | Mitja Felicijan <mitja.felicijan@gmail.com> | 2026-01-21 22:52:54 +0100 |
| commit | dcacc00e3750300617ba6e16eb346713f91a783a (patch) | |
| tree | 38e2d4fb5ed9d119711d4295c6eda4b014af73fd /examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4 | |
| parent | 58dac10aeb8f5a041c46bddbeaf4c7966a99b998 (diff) | |
| download | crep-dcacc00e3750300617ba6e16eb346713f91a783a.tar.gz | |
Remove testing data
Diffstat (limited to 'examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4')
| -rw-r--r-- | examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4 | 951 |
1 files changed, 0 insertions, 951 deletions
diff --git a/examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4 b/examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4 deleted file mode 100644 index 43087b2..0000000 --- a/examples/redis-unstable/deps/jemalloc/m4/ax_cxx_compile_stdcxx.m4 +++ /dev/null | |||
| @@ -1,951 +0,0 @@ | |||
| 1 | # =========================================================================== | ||
| 2 | # https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html | ||
| 3 | # =========================================================================== | ||
| 4 | # | ||
| 5 | # SYNOPSIS | ||
| 6 | # | ||
| 7 | # AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional]) | ||
| 8 | # | ||
| 9 | # DESCRIPTION | ||
| 10 | # | ||
| 11 | # Check for baseline language coverage in the compiler for the specified | ||
| 12 | # version of the C++ standard. If necessary, add switches to CXX and | ||
| 13 | # CXXCPP to enable support. VERSION may be '11' (for the C++11 standard) | ||
| 14 | # or '14' (for the C++14 standard). | ||
| 15 | # | ||
| 16 | # The second argument, if specified, indicates whether you insist on an | ||
| 17 | # extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g. | ||
| 18 | # -std=c++11). If neither is specified, you get whatever works, with | ||
| 19 | # preference for an extended mode. | ||
| 20 | # | ||
| 21 | # The third argument, if specified 'mandatory' or if left unspecified, | ||
| 22 | # indicates that baseline support for the specified C++ standard is | ||
| 23 | # required and that the macro should error out if no mode with that | ||
| 24 | # support is found. If specified 'optional', then configuration proceeds | ||
| 25 | # regardless, after defining HAVE_CXX${VERSION} if and only if a | ||
| 26 | # supporting mode is found. | ||
| 27 | # | ||
| 28 | # LICENSE | ||
| 29 | # | ||
| 30 | # Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com> | ||
| 31 | # Copyright (c) 2012 Zack Weinberg <zackw@panix.com> | ||
| 32 | # Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu> | ||
| 33 | # Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com> | ||
| 34 | # Copyright (c) 2015 Paul Norman <penorman@mac.com> | ||
| 35 | # Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu> | ||
| 36 | # Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com> | ||
| 37 | # Copyright (c) 2019 Enji Cooper <yaneurabeya@gmail.com> | ||
| 38 | # | ||
| 39 | # Copying and distribution of this file, with or without modification, are | ||
| 40 | # permitted in any medium without royalty provided the copyright notice | ||
| 41 | # and this notice are preserved. This file is offered as-is, without any | ||
| 42 | # warranty. | ||
| 43 | |||
| 44 | #serial 11 | ||
| 45 | |||
| 46 | dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro | ||
| 47 | dnl (serial version number 13). | ||
| 48 | |||
| 49 | AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl | ||
| 50 | m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"], | ||
| 51 | [$1], [14], [ax_cxx_compile_alternatives="14 1y"], | ||
| 52 | [$1], [17], [ax_cxx_compile_alternatives="17 1z"], | ||
| 53 | [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl | ||
| 54 | m4_if([$2], [], [], | ||
| 55 | [$2], [ext], [], | ||
| 56 | [$2], [noext], [], | ||
| 57 | [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl | ||
| 58 | m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true], | ||
| 59 | [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true], | ||
| 60 | [$3], [optional], [ax_cxx_compile_cxx$1_required=false], | ||
| 61 | [m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])]) | ||
| 62 | AC_LANG_PUSH([C++])dnl | ||
| 63 | ac_success=no | ||
| 64 | |||
| 65 | m4_if([$2], [noext], [], [dnl | ||
| 66 | if test x$ac_success = xno; then | ||
| 67 | for alternative in ${ax_cxx_compile_alternatives}; do | ||
| 68 | switch="-std=gnu++${alternative}" | ||
| 69 | cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch]) | ||
| 70 | AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch, | ||
| 71 | $cachevar, | ||
| 72 | [ac_save_CXX="$CXX" | ||
| 73 | CXX="$CXX $switch" | ||
| 74 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], | ||
| 75 | [eval $cachevar=yes], | ||
| 76 | [eval $cachevar=no]) | ||
| 77 | CXX="$ac_save_CXX"]) | ||
| 78 | if eval test x\$$cachevar = xyes; then | ||
| 79 | CXX="$CXX $switch" | ||
| 80 | if test -n "$CXXCPP" ; then | ||
| 81 | CXXCPP="$CXXCPP $switch" | ||
| 82 | fi | ||
| 83 | ac_success=yes | ||
| 84 | break | ||
| 85 | fi | ||
| 86 | done | ||
| 87 | fi]) | ||
| 88 | |||
| 89 | m4_if([$2], [ext], [], [dnl | ||
| 90 | if test x$ac_success = xno; then | ||
| 91 | dnl HP's aCC needs +std=c++11 according to: | ||
| 92 | dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf | ||
| 93 | dnl Cray's crayCC needs "-h std=c++11" | ||
| 94 | for alternative in ${ax_cxx_compile_alternatives}; do | ||
| 95 | for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do | ||
| 96 | cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch]) | ||
| 97 | AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch, | ||
| 98 | $cachevar, | ||
| 99 | [ac_save_CXX="$CXX" | ||
| 100 | CXX="$CXX $switch" | ||
| 101 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], | ||
| 102 | [eval $cachevar=yes], | ||
| 103 | [eval $cachevar=no]) | ||
| 104 | CXX="$ac_save_CXX"]) | ||
| 105 | if eval test x\$$cachevar = xyes; then | ||
| 106 | CXX="$CXX $switch" | ||
| 107 | if test -n "$CXXCPP" ; then | ||
| 108 | CXXCPP="$CXXCPP $switch" | ||
| 109 | fi | ||
| 110 | ac_success=yes | ||
| 111 | break | ||
| 112 | fi | ||
| 113 | done | ||
| 114 | if test x$ac_success = xyes; then | ||
| 115 | break | ||
| 116 | fi | ||
| 117 | done | ||
| 118 | fi]) | ||
| 119 | AC_LANG_POP([C++]) | ||
| 120 | if test x$ax_cxx_compile_cxx$1_required = xtrue; then | ||
| 121 | if test x$ac_success = xno; then | ||
| 122 | AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.]) | ||
| 123 | fi | ||
| 124 | fi | ||
| 125 | if test x$ac_success = xno; then | ||
| 126 | HAVE_CXX$1=0 | ||
| 127 | AC_MSG_NOTICE([No compiler with C++$1 support was found]) | ||
| 128 | else | ||
| 129 | HAVE_CXX$1=1 | ||
| 130 | AC_DEFINE(HAVE_CXX$1,1, | ||
| 131 | [define if the compiler supports basic C++$1 syntax]) | ||
| 132 | fi | ||
| 133 | AC_SUBST(HAVE_CXX$1) | ||
| 134 | ]) | ||
| 135 | |||
| 136 | |||
| 137 | dnl Test body for checking C++11 support | ||
| 138 | |||
| 139 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11], | ||
| 140 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_11 | ||
| 141 | ) | ||
| 142 | |||
| 143 | |||
| 144 | dnl Test body for checking C++14 support | ||
| 145 | |||
| 146 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14], | ||
| 147 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_11 | ||
| 148 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_14 | ||
| 149 | ) | ||
| 150 | |||
| 151 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17], | ||
| 152 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_11 | ||
| 153 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_14 | ||
| 154 | _AX_CXX_COMPILE_STDCXX_testbody_new_in_17 | ||
| 155 | ) | ||
| 156 | |||
| 157 | dnl Tests for new features in C++11 | ||
| 158 | |||
| 159 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[ | ||
| 160 | |||
| 161 | // If the compiler admits that it is not ready for C++11, why torture it? | ||
| 162 | // Hopefully, this will speed up the test. | ||
| 163 | |||
| 164 | #ifndef __cplusplus | ||
| 165 | |||
| 166 | #error "This is not a C++ compiler" | ||
| 167 | |||
| 168 | #elif __cplusplus < 201103L | ||
| 169 | |||
| 170 | #error "This is not a C++11 compiler" | ||
| 171 | |||
| 172 | #else | ||
| 173 | |||
| 174 | namespace cxx11 | ||
| 175 | { | ||
| 176 | |||
| 177 | namespace test_static_assert | ||
| 178 | { | ||
| 179 | |||
| 180 | template <typename T> | ||
| 181 | struct check | ||
| 182 | { | ||
| 183 | static_assert(sizeof(int) <= sizeof(T), "not big enough"); | ||
| 184 | }; | ||
| 185 | |||
| 186 | } | ||
| 187 | |||
| 188 | namespace test_final_override | ||
| 189 | { | ||
| 190 | |||
| 191 | struct Base | ||
| 192 | { | ||
| 193 | virtual ~Base() {} | ||
| 194 | virtual void f() {} | ||
| 195 | }; | ||
| 196 | |||
| 197 | struct Derived : public Base | ||
| 198 | { | ||
| 199 | virtual ~Derived() override {} | ||
| 200 | virtual void f() override {} | ||
| 201 | }; | ||
| 202 | |||
| 203 | } | ||
| 204 | |||
| 205 | namespace test_double_right_angle_brackets | ||
| 206 | { | ||
| 207 | |||
| 208 | template < typename T > | ||
| 209 | struct check {}; | ||
| 210 | |||
| 211 | typedef check<void> single_type; | ||
| 212 | typedef check<check<void>> double_type; | ||
| 213 | typedef check<check<check<void>>> triple_type; | ||
| 214 | typedef check<check<check<check<void>>>> quadruple_type; | ||
| 215 | |||
| 216 | } | ||
| 217 | |||
| 218 | namespace test_decltype | ||
| 219 | { | ||
| 220 | |||
| 221 | int | ||
| 222 | f() | ||
| 223 | { | ||
| 224 | int a = 1; | ||
| 225 | decltype(a) b = 2; | ||
| 226 | return a + b; | ||
| 227 | } | ||
| 228 | |||
| 229 | } | ||
| 230 | |||
| 231 | namespace test_type_deduction | ||
| 232 | { | ||
| 233 | |||
| 234 | template < typename T1, typename T2 > | ||
| 235 | struct is_same | ||
| 236 | { | ||
| 237 | static const bool value = false; | ||
| 238 | }; | ||
| 239 | |||
| 240 | template < typename T > | ||
| 241 | struct is_same<T, T> | ||
| 242 | { | ||
| 243 | static const bool value = true; | ||
| 244 | }; | ||
| 245 | |||
| 246 | template < typename T1, typename T2 > | ||
| 247 | auto | ||
| 248 | add(T1 a1, T2 a2) -> decltype(a1 + a2) | ||
| 249 | { | ||
| 250 | return a1 + a2; | ||
| 251 | } | ||
| 252 | |||
| 253 | int | ||
| 254 | test(const int c, volatile int v) | ||
| 255 | { | ||
| 256 | static_assert(is_same<int, decltype(0)>::value == true, ""); | ||
| 257 | static_assert(is_same<int, decltype(c)>::value == false, ""); | ||
| 258 | static_assert(is_same<int, decltype(v)>::value == false, ""); | ||
| 259 | auto ac = c; | ||
| 260 | auto av = v; | ||
| 261 | auto sumi = ac + av + 'x'; | ||
| 262 | auto sumf = ac + av + 1.0; | ||
| 263 | static_assert(is_same<int, decltype(ac)>::value == true, ""); | ||
| 264 | static_assert(is_same<int, decltype(av)>::value == true, ""); | ||
| 265 | static_assert(is_same<int, decltype(sumi)>::value == true, ""); | ||
| 266 | static_assert(is_same<int, decltype(sumf)>::value == false, ""); | ||
| 267 | static_assert(is_same<int, decltype(add(c, v))>::value == true, ""); | ||
| 268 | return (sumf > 0.0) ? sumi : add(c, v); | ||
| 269 | } | ||
| 270 | |||
| 271 | } | ||
| 272 | |||
| 273 | namespace test_noexcept | ||
| 274 | { | ||
| 275 | |||
| 276 | int f() { return 0; } | ||
| 277 | int g() noexcept { return 0; } | ||
| 278 | |||
| 279 | static_assert(noexcept(f()) == false, ""); | ||
| 280 | static_assert(noexcept(g()) == true, ""); | ||
| 281 | |||
| 282 | } | ||
| 283 | |||
| 284 | namespace test_constexpr | ||
| 285 | { | ||
| 286 | |||
| 287 | template < typename CharT > | ||
| 288 | unsigned long constexpr | ||
| 289 | strlen_c_r(const CharT *const s, const unsigned long acc) noexcept | ||
| 290 | { | ||
| 291 | return *s ? strlen_c_r(s + 1, acc + 1) : acc; | ||
| 292 | } | ||
| 293 | |||
| 294 | template < typename CharT > | ||
| 295 | unsigned long constexpr | ||
| 296 | strlen_c(const CharT *const s) noexcept | ||
| 297 | { | ||
| 298 | return strlen_c_r(s, 0UL); | ||
| 299 | } | ||
| 300 | |||
| 301 | static_assert(strlen_c("") == 0UL, ""); | ||
| 302 | static_assert(strlen_c("1") == 1UL, ""); | ||
| 303 | static_assert(strlen_c("example") == 7UL, ""); | ||
| 304 | static_assert(strlen_c("another\0example") == 7UL, ""); | ||
| 305 | |||
| 306 | } | ||
| 307 | |||
| 308 | namespace test_rvalue_references | ||
| 309 | { | ||
| 310 | |||
| 311 | template < int N > | ||
| 312 | struct answer | ||
| 313 | { | ||
| 314 | static constexpr int value = N; | ||
| 315 | }; | ||
| 316 | |||
| 317 | answer<1> f(int&) { return answer<1>(); } | ||
| 318 | answer<2> f(const int&) { return answer<2>(); } | ||
| 319 | answer<3> f(int&&) { return answer<3>(); } | ||
| 320 | |||
| 321 | void | ||
| 322 | test() | ||
| 323 | { | ||
| 324 | int i = 0; | ||
| 325 | const int c = 0; | ||
| 326 | static_assert(decltype(f(i))::value == 1, ""); | ||
| 327 | static_assert(decltype(f(c))::value == 2, ""); | ||
| 328 | static_assert(decltype(f(0))::value == 3, ""); | ||
| 329 | } | ||
| 330 | |||
| 331 | } | ||
| 332 | |||
| 333 | namespace test_uniform_initialization | ||
| 334 | { | ||
| 335 | |||
| 336 | struct test | ||
| 337 | { | ||
| 338 | static const int zero {}; | ||
| 339 | static const int one {1}; | ||
| 340 | }; | ||
| 341 | |||
| 342 | static_assert(test::zero == 0, ""); | ||
| 343 | static_assert(test::one == 1, ""); | ||
| 344 | |||
| 345 | } | ||
| 346 | |||
| 347 | namespace test_lambdas | ||
| 348 | { | ||
| 349 | |||
| 350 | void | ||
| 351 | test1() | ||
| 352 | { | ||
| 353 | auto lambda1 = [](){}; | ||
| 354 | auto lambda2 = lambda1; | ||
| 355 | lambda1(); | ||
| 356 | lambda2(); | ||
| 357 | } | ||
| 358 | |||
| 359 | int | ||
| 360 | test2() | ||
| 361 | { | ||
| 362 | auto a = [](int i, int j){ return i + j; }(1, 2); | ||
| 363 | auto b = []() -> int { return '0'; }(); | ||
| 364 | auto c = [=](){ return a + b; }(); | ||
| 365 | auto d = [&](){ return c; }(); | ||
| 366 | auto e = [a, &b](int x) mutable { | ||
| 367 | const auto identity = [](int y){ return y; }; | ||
| 368 | for (auto i = 0; i < a; ++i) | ||
| 369 | a += b--; | ||
| 370 | return x + identity(a + b); | ||
| 371 | }(0); | ||
| 372 | return a + b + c + d + e; | ||
| 373 | } | ||
| 374 | |||
| 375 | int | ||
| 376 | test3() | ||
| 377 | { | ||
| 378 | const auto nullary = [](){ return 0; }; | ||
| 379 | const auto unary = [](int x){ return x; }; | ||
| 380 | using nullary_t = decltype(nullary); | ||
| 381 | using unary_t = decltype(unary); | ||
| 382 | const auto higher1st = [](nullary_t f){ return f(); }; | ||
| 383 | const auto higher2nd = [unary](nullary_t f1){ | ||
| 384 | return [unary, f1](unary_t f2){ return f2(unary(f1())); }; | ||
| 385 | }; | ||
| 386 | return higher1st(nullary) + higher2nd(nullary)(unary); | ||
| 387 | } | ||
| 388 | |||
| 389 | } | ||
| 390 | |||
| 391 | namespace test_variadic_templates | ||
| 392 | { | ||
| 393 | |||
| 394 | template <int...> | ||
| 395 | struct sum; | ||
| 396 | |||
| 397 | template <int N0, int... N1toN> | ||
| 398 | struct sum<N0, N1toN...> | ||
| 399 | { | ||
| 400 | static constexpr auto value = N0 + sum<N1toN...>::value; | ||
| 401 | }; | ||
| 402 | |||
| 403 | template <> | ||
| 404 | struct sum<> | ||
| 405 | { | ||
| 406 | static constexpr auto value = 0; | ||
| 407 | }; | ||
| 408 | |||
| 409 | static_assert(sum<>::value == 0, ""); | ||
| 410 | static_assert(sum<1>::value == 1, ""); | ||
| 411 | static_assert(sum<23>::value == 23, ""); | ||
| 412 | static_assert(sum<1, 2>::value == 3, ""); | ||
| 413 | static_assert(sum<5, 5, 11>::value == 21, ""); | ||
| 414 | static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, ""); | ||
| 415 | |||
| 416 | } | ||
| 417 | |||
| 418 | // http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae | ||
| 419 | // Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function | ||
| 420 | // because of this. | ||
| 421 | namespace test_template_alias_sfinae | ||
| 422 | { | ||
| 423 | |||
| 424 | struct foo {}; | ||
| 425 | |||
| 426 | template<typename T> | ||
| 427 | using member = typename T::member_type; | ||
| 428 | |||
| 429 | template<typename T> | ||
| 430 | void func(...) {} | ||
| 431 | |||
| 432 | template<typename T> | ||
| 433 | void func(member<T>*) {} | ||
| 434 | |||
| 435 | void test(); | ||
| 436 | |||
| 437 | void test() { func<foo>(0); } | ||
| 438 | |||
| 439 | } | ||
| 440 | |||
| 441 | } // namespace cxx11 | ||
| 442 | |||
| 443 | #endif // __cplusplus >= 201103L | ||
| 444 | |||
| 445 | ]]) | ||
| 446 | |||
| 447 | |||
| 448 | dnl Tests for new features in C++14 | ||
| 449 | |||
| 450 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[ | ||
| 451 | |||
| 452 | // If the compiler admits that it is not ready for C++14, why torture it? | ||
| 453 | // Hopefully, this will speed up the test. | ||
| 454 | |||
| 455 | #ifndef __cplusplus | ||
| 456 | |||
| 457 | #error "This is not a C++ compiler" | ||
| 458 | |||
| 459 | #elif __cplusplus < 201402L | ||
| 460 | |||
| 461 | #error "This is not a C++14 compiler" | ||
| 462 | |||
| 463 | #else | ||
| 464 | |||
| 465 | namespace cxx14 | ||
| 466 | { | ||
| 467 | |||
| 468 | namespace test_polymorphic_lambdas | ||
| 469 | { | ||
| 470 | |||
| 471 | int | ||
| 472 | test() | ||
| 473 | { | ||
| 474 | const auto lambda = [](auto&&... args){ | ||
| 475 | const auto istiny = [](auto x){ | ||
| 476 | return (sizeof(x) == 1UL) ? 1 : 0; | ||
| 477 | }; | ||
| 478 | const int aretiny[] = { istiny(args)... }; | ||
| 479 | return aretiny[0]; | ||
| 480 | }; | ||
| 481 | return lambda(1, 1L, 1.0f, '1'); | ||
| 482 | } | ||
| 483 | |||
| 484 | } | ||
| 485 | |||
| 486 | namespace test_binary_literals | ||
| 487 | { | ||
| 488 | |||
| 489 | constexpr auto ivii = 0b0000000000101010; | ||
| 490 | static_assert(ivii == 42, "wrong value"); | ||
| 491 | |||
| 492 | } | ||
| 493 | |||
| 494 | namespace test_generalized_constexpr | ||
| 495 | { | ||
| 496 | |||
| 497 | template < typename CharT > | ||
| 498 | constexpr unsigned long | ||
| 499 | strlen_c(const CharT *const s) noexcept | ||
| 500 | { | ||
| 501 | auto length = 0UL; | ||
| 502 | for (auto p = s; *p; ++p) | ||
| 503 | ++length; | ||
| 504 | return length; | ||
| 505 | } | ||
| 506 | |||
| 507 | static_assert(strlen_c("") == 0UL, ""); | ||
| 508 | static_assert(strlen_c("x") == 1UL, ""); | ||
| 509 | static_assert(strlen_c("test") == 4UL, ""); | ||
| 510 | static_assert(strlen_c("another\0test") == 7UL, ""); | ||
| 511 | |||
| 512 | } | ||
| 513 | |||
| 514 | namespace test_lambda_init_capture | ||
| 515 | { | ||
| 516 | |||
| 517 | int | ||
| 518 | test() | ||
| 519 | { | ||
| 520 | auto x = 0; | ||
| 521 | const auto lambda1 = [a = x](int b){ return a + b; }; | ||
| 522 | const auto lambda2 = [a = lambda1(x)](){ return a; }; | ||
| 523 | return lambda2(); | ||
| 524 | } | ||
| 525 | |||
| 526 | } | ||
| 527 | |||
| 528 | namespace test_digit_separators | ||
| 529 | { | ||
| 530 | |||
| 531 | constexpr auto ten_million = 100'000'000; | ||
| 532 | static_assert(ten_million == 100000000, ""); | ||
| 533 | |||
| 534 | } | ||
| 535 | |||
| 536 | namespace test_return_type_deduction | ||
| 537 | { | ||
| 538 | |||
| 539 | auto f(int& x) { return x; } | ||
| 540 | decltype(auto) g(int& x) { return x; } | ||
| 541 | |||
| 542 | template < typename T1, typename T2 > | ||
| 543 | struct is_same | ||
| 544 | { | ||
| 545 | static constexpr auto value = false; | ||
| 546 | }; | ||
| 547 | |||
| 548 | template < typename T > | ||
| 549 | struct is_same<T, T> | ||
| 550 | { | ||
| 551 | static constexpr auto value = true; | ||
| 552 | }; | ||
| 553 | |||
| 554 | int | ||
| 555 | test() | ||
| 556 | { | ||
| 557 | auto x = 0; | ||
| 558 | static_assert(is_same<int, decltype(f(x))>::value, ""); | ||
| 559 | static_assert(is_same<int&, decltype(g(x))>::value, ""); | ||
| 560 | return x; | ||
| 561 | } | ||
| 562 | |||
| 563 | } | ||
| 564 | |||
| 565 | } // namespace cxx14 | ||
| 566 | |||
| 567 | #endif // __cplusplus >= 201402L | ||
| 568 | |||
| 569 | ]]) | ||
| 570 | |||
| 571 | |||
| 572 | dnl Tests for new features in C++17 | ||
| 573 | |||
| 574 | m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[ | ||
| 575 | |||
| 576 | // If the compiler admits that it is not ready for C++17, why torture it? | ||
| 577 | // Hopefully, this will speed up the test. | ||
| 578 | |||
| 579 | #ifndef __cplusplus | ||
| 580 | |||
| 581 | #error "This is not a C++ compiler" | ||
| 582 | |||
| 583 | #elif __cplusplus < 201703L | ||
| 584 | |||
| 585 | #error "This is not a C++17 compiler" | ||
| 586 | |||
| 587 | #else | ||
| 588 | |||
| 589 | #include <initializer_list> | ||
| 590 | #include <utility> | ||
| 591 | #include <type_traits> | ||
| 592 | |||
| 593 | namespace cxx17 | ||
| 594 | { | ||
| 595 | |||
| 596 | namespace test_constexpr_lambdas | ||
| 597 | { | ||
| 598 | |||
| 599 | constexpr int foo = [](){return 42;}(); | ||
| 600 | |||
| 601 | } | ||
| 602 | |||
| 603 | namespace test::nested_namespace::definitions | ||
| 604 | { | ||
| 605 | |||
| 606 | } | ||
| 607 | |||
| 608 | namespace test_fold_expression | ||
| 609 | { | ||
| 610 | |||
| 611 | template<typename... Args> | ||
| 612 | int multiply(Args... args) | ||
| 613 | { | ||
| 614 | return (args * ... * 1); | ||
| 615 | } | ||
| 616 | |||
| 617 | template<typename... Args> | ||
| 618 | bool all(Args... args) | ||
| 619 | { | ||
| 620 | return (args && ...); | ||
| 621 | } | ||
| 622 | |||
| 623 | } | ||
| 624 | |||
| 625 | namespace test_extended_static_assert | ||
| 626 | { | ||
| 627 | |||
| 628 | static_assert (true); | ||
| 629 | |||
| 630 | } | ||
| 631 | |||
| 632 | namespace test_auto_brace_init_list | ||
| 633 | { | ||
| 634 | |||
| 635 | auto foo = {5}; | ||
| 636 | auto bar {5}; | ||
| 637 | |||
| 638 | static_assert(std::is_same<std::initializer_list<int>, decltype(foo)>::value); | ||
| 639 | static_assert(std::is_same<int, decltype(bar)>::value); | ||
| 640 | } | ||
| 641 | |||
| 642 | namespace test_typename_in_template_template_parameter | ||
| 643 | { | ||
| 644 | |||
| 645 | template<template<typename> typename X> struct D; | ||
| 646 | |||
| 647 | } | ||
| 648 | |||
| 649 | namespace test_fallthrough_nodiscard_maybe_unused_attributes | ||
| 650 | { | ||
| 651 | |||
| 652 | int f1() | ||
| 653 | { | ||
| 654 | return 42; | ||
| 655 | } | ||
| 656 | |||
| 657 | [[nodiscard]] int f2() | ||
| 658 | { | ||
| 659 | [[maybe_unused]] auto unused = f1(); | ||
| 660 | |||
| 661 | switch (f1()) | ||
| 662 | { | ||
| 663 | case 17: | ||
| 664 | f1(); | ||
| 665 | [[fallthrough]]; | ||
| 666 | case 42: | ||
| 667 | f1(); | ||
| 668 | } | ||
| 669 | return f1(); | ||
| 670 | } | ||
| 671 | |||
| 672 | } | ||
| 673 | |||
| 674 | namespace test_extended_aggregate_initialization | ||
| 675 | { | ||
| 676 | |||
| 677 | struct base1 | ||
| 678 | { | ||
| 679 | int b1, b2 = 42; | ||
| 680 | }; | ||
| 681 | |||
| 682 | struct base2 | ||
| 683 | { | ||
| 684 | base2() { | ||
| 685 | b3 = 42; | ||
| 686 | } | ||
| 687 | int b3; | ||
| 688 | }; | ||
| 689 | |||
| 690 | struct derived : base1, base2 | ||
| 691 | { | ||
| 692 | int d; | ||
| 693 | }; | ||
| 694 | |||
| 695 | derived d1 {{1, 2}, {}, 4}; // full initialization | ||
| 696 | derived d2 {{}, {}, 4}; // value-initialized bases | ||
| 697 | |||
| 698 | } | ||
| 699 | |||
| 700 | namespace test_general_range_based_for_loop | ||
| 701 | { | ||
| 702 | |||
| 703 | struct iter | ||
| 704 | { | ||
| 705 | int i; | ||
| 706 | |||
| 707 | int& operator* () | ||
| 708 | { | ||
| 709 | return i; | ||
| 710 | } | ||
| 711 | |||
| 712 | const int& operator* () const | ||
| 713 | { | ||
| 714 | return i; | ||
| 715 | } | ||
| 716 | |||
| 717 | iter& operator++() | ||
| 718 | { | ||
| 719 | ++i; | ||
| 720 | return *this; | ||
| 721 | } | ||
| 722 | }; | ||
| 723 | |||
| 724 | struct sentinel | ||
| 725 | { | ||
| 726 | int i; | ||
| 727 | }; | ||
| 728 | |||
| 729 | bool operator== (const iter& i, const sentinel& s) | ||
| 730 | { | ||
| 731 | return i.i == s.i; | ||
| 732 | } | ||
| 733 | |||
| 734 | bool operator!= (const iter& i, const sentinel& s) | ||
| 735 | { | ||
| 736 | return !(i == s); | ||
| 737 | } | ||
| 738 | |||
| 739 | struct range | ||
| 740 | { | ||
| 741 | iter begin() const | ||
| 742 | { | ||
| 743 | return {0}; | ||
| 744 | } | ||
| 745 | |||
| 746 | sentinel end() const | ||
| 747 | { | ||
| 748 | return {5}; | ||
| 749 | } | ||
| 750 | }; | ||
| 751 | |||
| 752 | void f() | ||
| 753 | { | ||
| 754 | range r {}; | ||
| 755 | |||
| 756 | for (auto i : r) | ||
| 757 | { | ||
| 758 | [[maybe_unused]] auto v = i; | ||
| 759 | } | ||
| 760 | } | ||
| 761 | |||
| 762 | } | ||
| 763 | |||
| 764 | namespace test_lambda_capture_asterisk_this_by_value | ||
| 765 | { | ||
| 766 | |||
| 767 | struct t | ||
| 768 | { | ||
| 769 | int i; | ||
| 770 | int foo() | ||
| 771 | { | ||
| 772 | return [*this]() | ||
| 773 | { | ||
| 774 | return i; | ||
| 775 | }(); | ||
| 776 | } | ||
| 777 | }; | ||
| 778 | |||
| 779 | } | ||
| 780 | |||
| 781 | namespace test_enum_class_construction | ||
| 782 | { | ||
| 783 | |||
| 784 | enum class byte : unsigned char | ||
| 785 | {}; | ||
| 786 | |||
| 787 | byte foo {42}; | ||
| 788 | |||
| 789 | } | ||
| 790 | |||
| 791 | namespace test_constexpr_if | ||
| 792 | { | ||
| 793 | |||
| 794 | template <bool cond> | ||
| 795 | int f () | ||
| 796 | { | ||
| 797 | if constexpr(cond) | ||
| 798 | { | ||
| 799 | return 13; | ||
| 800 | } | ||
| 801 | else | ||
| 802 | { | ||
| 803 | return 42; | ||
| 804 | } | ||
| 805 | } | ||
| 806 | |||
| 807 | } | ||
| 808 | |||
| 809 | namespace test_selection_statement_with_initializer | ||
| 810 | { | ||
| 811 | |||
| 812 | int f() | ||
| 813 | { | ||
| 814 | return 13; | ||
| 815 | } | ||
| 816 | |||
| 817 | int f2() | ||
| 818 | { | ||
| 819 | if (auto i = f(); i > 0) | ||
| 820 | { | ||
| 821 | return 3; | ||
| 822 | } | ||
| 823 | |||
| 824 | switch (auto i = f(); i + 4) | ||
| 825 | { | ||
| 826 | case 17: | ||
| 827 | return 2; | ||
| 828 | |||
| 829 | default: | ||
| 830 | return 1; | ||
| 831 | } | ||
| 832 | } | ||
| 833 | |||
| 834 | } | ||
| 835 | |||
| 836 | namespace test_template_argument_deduction_for_class_templates | ||
| 837 | { | ||
| 838 | |||
| 839 | template <typename T1, typename T2> | ||
| 840 | struct pair | ||
| 841 | { | ||
| 842 | pair (T1 p1, T2 p2) | ||
| 843 | : m1 {p1}, | ||
| 844 | m2 {p2} | ||
| 845 | {} | ||
| 846 | |||
| 847 | T1 m1; | ||
| 848 | T2 m2; | ||
| 849 | }; | ||
| 850 | |||
| 851 | void f() | ||
| 852 | { | ||
| 853 | [[maybe_unused]] auto p = pair{13, 42u}; | ||
| 854 | } | ||
| 855 | |||
| 856 | } | ||
| 857 | |||
| 858 | namespace test_non_type_auto_template_parameters | ||
| 859 | { | ||
| 860 | |||
| 861 | template <auto n> | ||
| 862 | struct B | ||
| 863 | {}; | ||
| 864 | |||
| 865 | B<5> b1; | ||
| 866 | B<'a'> b2; | ||
| 867 | |||
| 868 | } | ||
| 869 | |||
| 870 | namespace test_structured_bindings | ||
| 871 | { | ||
| 872 | |||
| 873 | int arr[2] = { 1, 2 }; | ||
| 874 | std::pair<int, int> pr = { 1, 2 }; | ||
| 875 | |||
| 876 | auto f1() -> int(&)[2] | ||
| 877 | { | ||
| 878 | return arr; | ||
| 879 | } | ||
| 880 | |||
| 881 | auto f2() -> std::pair<int, int>& | ||
| 882 | { | ||
| 883 | return pr; | ||
| 884 | } | ||
| 885 | |||
| 886 | struct S | ||
| 887 | { | ||
| 888 | int x1 : 2; | ||
| 889 | volatile double y1; | ||
| 890 | }; | ||
| 891 | |||
| 892 | S f3() | ||
| 893 | { | ||
| 894 | return {}; | ||
| 895 | } | ||
| 896 | |||
| 897 | auto [ x1, y1 ] = f1(); | ||
| 898 | auto& [ xr1, yr1 ] = f1(); | ||
| 899 | auto [ x2, y2 ] = f2(); | ||
| 900 | auto& [ xr2, yr2 ] = f2(); | ||
| 901 | const auto [ x3, y3 ] = f3(); | ||
| 902 | |||
| 903 | } | ||
| 904 | |||
| 905 | namespace test_exception_spec_type_system | ||
| 906 | { | ||
| 907 | |||
| 908 | struct Good {}; | ||
| 909 | struct Bad {}; | ||
| 910 | |||
| 911 | void g1() noexcept; | ||
| 912 | void g2(); | ||
| 913 | |||
| 914 | template<typename T> | ||
| 915 | Bad | ||
| 916 | f(T*, T*); | ||
| 917 | |||
| 918 | template<typename T1, typename T2> | ||
| 919 | Good | ||
| 920 | f(T1*, T2*); | ||
| 921 | |||
| 922 | static_assert (std::is_same_v<Good, decltype(f(g1, g2))>); | ||
| 923 | |||
| 924 | } | ||
| 925 | |||
| 926 | namespace test_inline_variables | ||
| 927 | { | ||
| 928 | |||
| 929 | template<class T> void f(T) | ||
| 930 | {} | ||
| 931 | |||
| 932 | template<class T> inline T g(T) | ||
| 933 | { | ||
| 934 | return T{}; | ||
| 935 | } | ||
| 936 | |||
| 937 | template<> inline void f<>(int) | ||
| 938 | {} | ||
| 939 | |||
| 940 | template<> int g<>(int) | ||
| 941 | { | ||
| 942 | return 5; | ||
| 943 | } | ||
| 944 | |||
| 945 | } | ||
| 946 | |||
| 947 | } // namespace cxx17 | ||
| 948 | |||
| 949 | #endif // __cplusplus < 201703L | ||
| 950 | |||
| 951 | ]]) | ||
