libstdc++-v3/testsuite/20_util/result_of/sfinae_friendly_1.cc

   1 // { dg-do compile { target c++11 } }
   2 // { dg-additional-options "-Wno-volatile" { target c++2a } }
   3
   4 // Copyright (C) 2012-2020 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <memory>
  22 #include <cstddef>
  23 #include <type_traits>
  24
  25 // Uncomment the following define once gcc has fixed bug 52748
  26 // (incomplete types in function call expressions):
  27 #define HAS_52748_FIXED
  28
  29 // Helper types:
  30 struct has_type_impl
  31 {
  32   template<typename T, typename = typename T::type>
  33   static std::true_type test(int);
  34
  35   template<typename>
  36   static std::false_type test(...);
  37 };
  38
  39 template<typename T>
  40 struct has_type : public decltype(has_type_impl::test<T>(0))
  41 {};
  42
  43 template<typename T, typename Res>
  44 struct is_expected_type : public std::is_same<typename T::type, Res>
  45 {};
  46
  47 template<typename P1, typename P2>
  48 struct and_ : public std::conditional<P1::value, P2, std::false_type>::type
  49 {};
  50
  51 template<typename T, typename Res>
  52 struct is_type : public and_<has_type<T>, is_expected_type<T, Res>>
  53 {};
  54
  55 // Types under inspection:
  56
  57 typedef bool (&PF1)();
  58 typedef short (*PF2)(long);
  59
  60 struct S {
  61   operator PF2() const;
  62   double operator()(char, int&);
  63   void calc(long) const;
  64 };
  65
  66 typedef void (S::*PMS)(long) const;
  67 typedef void (S::*PMSnonconst)(long);
  68
  69 typedef int S::* PMI;
  70
  71 struct B {
  72   int i;
  73   void f1() const;
  74   bool f2(int) const volatile;
  75 };
  76
  77 struct D : B {};
  78
  79 typedef void (B::*base_func_void)() const;
  80 typedef bool (B::*base_func_bool_int)(int) const volatile;
  81
  82 struct ident_functor {
  83   template<typename T>
  84   T operator()(T&& x);
  85 };
  86
  87 template<typename Ret = void>
  88 struct variable_functor {
  89   template<typename... T>
  90   Ret operator()(T&&...);
  91 };
  92
  93 struct ident_functor_noref {
  94   template<typename T>
  95   typename std::remove_reference<T>::type operator()(T&& x);
  96 };
  97
  98 enum class ScEn;
  99
 100 enum UnScEn : int;
 101
 102 union U {
 103   int i;
 104   double d;
 105 };
 106
 107 union U2 {
 108   int i;
 109   bool b;
 110   void operator()() const;
 111   int operator()(double) const;
 112   bool operator()(double);
 113   U operator()(int, int);
 114 };
 115
 116 struct Ukn;
 117
 118 typedef Ukn (S::*PMSIncomplete)(long) const;
 119 typedef Ukn (S::*PMSIncompletenonconst)(long);
 120 typedef Ukn (*FuncIncomplete)(long);
 121
 122 struct Abstract {
 123   virtual ~Abstract() = 0;
 124 };
 125
 126 struct Private {
 127 private:
 128   void operator()();
 129   int operator()(int);
 130 public:
 131   bool operator()(std::nullptr_t);
 132 };
 133
 134 union PrivateUnion {
 135   double d;
 136 private:
 137   void operator()();
 138   int operator()(int);
 139 public:
 140   bool operator()(std::nullptr_t);
 141 };
 142
 143 template<typename T>
 144 struct ImplicitTo {
 145   operator T();
 146 };
 147
 148 template<typename>
 149 struct never { static const bool value = false; };
 150
 151 template<typename T>
 152 struct BrokenTrait {
 153   static_assert(never<T>::value, "Error!");
 154   typedef T type;
 155 };
 156
 157 template<typename T>
 158 struct BadSmartPtr : T {
 159   T& operator*() const noexcept(typename BrokenTrait<T>::type());
 160 };
 161
 162 template<typename Ret>
 163 using FuncEllipses = Ret(...);
 164
 165 static_assert(is_type<std::result_of<S(int)>, short>::value, "Error!");
 166 static_assert(is_type<std::result_of<S&(unsigned char, int&)>,
 167               double>::value, "Error!");
 168 static_assert(is_type<std::result_of<PF1()>, bool>::value, "Error!");
 169 static_assert(is_type<std::result_of<PF1&()>, bool>::value, "Error!");
 170 static_assert(is_type<std::result_of<PMS(std::unique_ptr<S>, int)>,
 171               void>::value, "Error!");
 172 static_assert(is_type<std::result_of<PMS(std::unique_ptr<S>&, unsigned&)>,
 173               void>::value, "Error!");
 174 static_assert(is_type<std::result_of<PMS&(std::unique_ptr<S>, int)>,
 175               void>::value, "Error!");
 176 static_assert(is_type<std::result_of<PMS&(std::unique_ptr<S>&, unsigned&)>,
 177               void>::value, "Error!");
 178
 179 static_assert(is_type<std::result_of<ident_functor(int)>,
 180               int>::value, "Error!");
 181 static_assert(is_type<std::result_of<ident_functor(const int)>,
 182               int>::value, "Error!");
 183 static_assert(is_type<std::result_of<ident_functor(const int&&)>,
 184               int>::value, "Error!");
 185 static_assert(is_type<std::result_of<ident_functor(int&&)>,
 186               int>::value, "Error!");
 187 static_assert(is_type<std::result_of<ident_functor(int&)>,
 188               int&>::value, "Error!");
 189
 190 static_assert(is_type<std::result_of<ident_functor(const B)>,
 191               B>::value, "Error!");
 192 static_assert(is_type<std::result_of<ident_functor(const B&&)>,
 193               const B>::value, "Error!");
 194 static_assert(is_type<std::result_of<ident_functor(B&&)>, B>::value, "Error!");
 195 static_assert(is_type<std::result_of<ident_functor(B&)>, B&>::value, "Error!");
 196
 197 static_assert(is_type<std::result_of<int B::*(B&)>, int&>::value, "Error!");
 198
 199 // This is expected as of CWG 616 P/R:
 200 static_assert(is_type<std::result_of<int B::*(B)>, int&&>::value, "Error!");
 201
 202 static_assert(is_type<std::result_of<volatile int B::*(const B&&)>,
 203               const volatile int&&>::value, "Error!");
 204 static_assert(is_type<std::result_of<const int B::*(volatile B&&)>,
 205               const volatile int&&>::value, "Error!");
 206
 207 static_assert(is_type<std::result_of<int B::*(const B&)>,
 208               const int&>::value, "Error!");
 209 static_assert(is_type<std::result_of<volatile int B::*(const B&)>,
 210               const volatile int&>::value, "Error!");
 211 static_assert(is_type<std::result_of<const int B::*(volatile B&)>,
 212               const volatile int&>::value, "Error!");
 213
 214 static_assert(is_type<std::result_of<int B::*(B*)>, int&>::value, "Error!");
 215 static_assert(is_type<std::result_of<int B::*(B*&)>, int&>(), "Error!");
 216 static_assert(is_type<std::result_of<int B::*(const B*)>,
 217               const int&>::value, "Error!");
 218 static_assert(is_type<std::result_of<int B::*(const B*&)>,
 219               const int&>::value, "Error!");
 220 static_assert(is_type<std::result_of<volatile int B::*(const B*)>,
 221               const volatile int&>::value, "Error!");
 222 static_assert(is_type<std::result_of<const int B::*(volatile B*)>,
 223               const volatile int&>::value, "Error!");
 224
 225 static_assert(is_type<std::result_of<base_func_void(const B&)>,
 226               void>::value, "Error!");
 227 static_assert(is_type<std::result_of<base_func_void(const B*)>,
 228               void>::value, "Error!");
 229 static_assert(is_type<std::result_of<base_func_void(B&)>,
 230               void>::value, "Error!");
 231 static_assert(is_type<std::result_of<base_func_void(B*)>,
 232               void>::value, "Error!");
 233
 234 static_assert(!has_type<std::result_of<base_func_void(volatile B&)>>::value,
 235               "Error!");
 236 static_assert(!has_type<std::result_of<base_func_void(volatile B*)>>::value,
 237               "Error!");
 238
 239 static_assert(is_type<std::result_of<base_func_bool_int(B&, long)>,
 240               bool>::value, "Error!");
 241 static_assert(is_type<std::result_of<base_func_bool_int(B*, long)>,
 242               bool>::value, "Error!");
 243 static_assert(is_type<std::result_of<base_func_bool_int(volatile B&, long)>,
 244               bool>::value, "Error!");
 245 static_assert(is_type<std::result_of<base_func_bool_int(volatile B*, long)>,
 246               bool>::value, "Error!");
 247
 248 static_assert(!has_type<std::result_of<int()>>(), "Error!");
 249 static_assert(!has_type<std::result_of<void()>>(), "Error!");
 250 static_assert(!has_type<std::result_of<int(int)>>(), "Error!");
 251 static_assert(!has_type<std::result_of<void(int)>>(), "Error!");
 252 static_assert(!has_type<std::result_of<PF1(int)>>(), "Error!");
 253 static_assert(is_type<std::result_of<PF2(long)>, short>(), "Error!");
 254 static_assert(!has_type<std::result_of<PF2()>>(), "Error!");
 255 static_assert(!has_type<std::result_of<PF2(B)>>(), "Error!");
 256 static_assert(!has_type<std::result_of<PF2(ScEn)>>(), "Error!");
 257 static_assert(is_type<std::result_of<PF2(UnScEn)>, short>(), "Error!");
 258 static_assert(!has_type<std::result_of<PF2(long, int)>>(), "Error!");
 259 static_assert(is_type<std::result_of<PMS(std::unique_ptr<S>, int)>, void>(),
 260               "Error!");
 261 static_assert(!has_type<std::result_of<PMS(int)>>(), "Error!");
 262 static_assert(!has_type<std::result_of<PMS(int, std::unique_ptr<S>)>>(), "Error!");
 263
 264 // Argument number mismatch:
 265 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>)>>(), "Error!");
 266 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>&)>>(), "Error!");
 267 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>, int, bool)>>(),
 268               "Error!");
 269 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>&, int, bool)>>(),
 270               "Error!");
 271 static_assert(!has_type<std::result_of<PMS(S)>>(), "Error!");
 272 static_assert(!has_type<std::result_of<PMS(S&)>>(), "Error!");
 273 static_assert(!has_type<std::result_of<PMS(S, int, bool)>>(), "Error!");
 274 static_assert(!has_type<std::result_of<PMS(S&, int, bool)>>(), "Error!");
 275
 276 // Non-convertible arguments:
 277 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>, S)>>(),
 278               "Error!");
 279 static_assert(!has_type<std::result_of<PMS(std::unique_ptr<S>&, S)>>(),
 280               "Error!");
 281 static_assert(!has_type<std::result_of<PMS(S, S)>>(), "Error!");
 282 static_assert(!has_type<std::result_of<PMS(S&, S)>>(), "Error!");
 283
 284 // cv-violations:
 285 static_assert(!has_type<std::result_of<PMSnonconst(const S&, long)>>(),
 286               "Error!");
 287 static_assert(!has_type<std::result_of<PMSnonconst(const S&&, long)>>(),
 288               "Error!");
 289 static_assert(!has_type<std::result_of<PMSnonconst(const S*, long)>>(),
 290               "Error!");
 291 static_assert(!has_type<std::result_of<PMSnonconst(const S*&, long)>>(),
 292               "Error!");
 293
 294 static_assert(is_type<std::result_of<PMI(S*)>, int&>(), "Error!");
 295 static_assert(is_type<std::result_of<PMI(S&)>, int&>(), "Error!");
 296 static_assert(is_type<std::result_of<PMI(S&&)>, int&&>(), "Error!");
 297 static_assert(is_type<std::result_of<PMI(S)>, int&&>(), "Error!");
 298
 299 static_assert(!has_type<std::result_of<PMI()>>(), "Error!");
 300
 301 static_assert(!has_type<std::result_of<PMI(S*, int)>>(), "Error!");
 302 static_assert(!has_type<std::result_of<PMI(S&, int)>>(), "Error!");
 303 static_assert(!has_type<std::result_of<PMI(S*, int, S, bool)>>(), "Error!");
 304 static_assert(!has_type<std::result_of<PMI(S&, int, S, bool)>>(), "Error!");
 305
 306 static_assert(!has_type<std::result_of<PMI(B*)>>(), "Error!");
 307 static_assert(!has_type<std::result_of<PMI(B&)>>(), "Error!");
 308
 309 static_assert(is_type<std::result_of<int U::*(U)>, int&&>(), "Error!");
 310 static_assert(is_type<std::result_of<int U::*(U&)>, int&>(), "Error!");
 311 static_assert(is_type<std::result_of<int U::*(const U&)>, const int&>(),
 312               "Error!");
 313 static_assert(is_type<std::result_of
 314               <volatile int U::*(const U&)>, const volatile int&>(), "Error!");
 315 static_assert(is_type<std::result_of
 316               <const int U::*(volatile U&)>, const volatile int&>(), "Error!");
 317
 318 static_assert(is_type<std::result_of<int Ukn::*(Ukn*)>, int&>(), "Error!");
 319 static_assert(is_type<std::result_of<int Ukn::*(Ukn&)>, int&>(), "Error!");
 320 static_assert(is_type<std::result_of<int Ukn::*(Ukn&&)>, int&&>(), "Error!");
 321 static_assert(is_type<std::result_of<int Ukn::*(const Ukn*)>, const int&>(),
 322               "Error!");
 323 static_assert(is_type<std::result_of<int Ukn::*(const Ukn&)>, const int&>(),
 324               "Error!");
 325 static_assert(is_type<std::result_of<int Ukn::*(const Ukn&&)>, const int&&>(),
 326               "Error!");
 327
 328 typedef void (Ukn::* PUfnMF)();
 329 typedef void (Ukn::* PUfnConstMF)() const;
 330
 331 static_assert(is_type<std::result_of<PUfnMF(Ukn*)>, void>(), "Error!");
 332 static_assert(is_type<std::result_of<PUfnMF(Ukn&)>, void>(), "Error!");
 333 static_assert(is_type<std::result_of<PUfnMF(Ukn&&)>, void>(), "Error!");
 334 static_assert(is_type<std::result_of<PUfnConstMF(Ukn*)>, void>(), "Error!");
 335 static_assert(is_type<std::result_of<PUfnConstMF(Ukn&)>, void>(), "Error!");
 336 static_assert(is_type<std::result_of<PUfnConstMF(Ukn&&)>, void>(), "Error!");
 337 static_assert(is_type<std::result_of<PUfnConstMF(const Ukn*)>, void>(),
 338               "Error!");
 339 static_assert(is_type<std::result_of<PUfnConstMF(const Ukn&)>, void>(),
 340               "Error!");
 341 static_assert(is_type<std::result_of<PUfnConstMF(const Ukn&&)>, void>(),
 342               "Error!");
 343
 344 static_assert(!has_type<std::result_of<S()>>(), "Error!");
 345 static_assert(!has_type<std::result_of<S(int, S)>>(), "Error!");
 346 static_assert(!has_type<std::result_of<S(S)>>(), "Error!");
 347 static_assert(!has_type<std::result_of
 348               <S(double, bool, std::nullptr_t, Ukn&)>>(), "Error!");
 349
 350 static_assert(is_type<std::result_of<U2()>, void>(), "Error!");
 351 static_assert(is_type<std::result_of<const U2&()>, void>(), "Error!");
 352 static_assert(is_type<std::result_of<U2&()>, void>(), "Error!");
 353 static_assert(is_type<std::result_of<U2(double)>, bool>(), "Error!");
 354 static_assert(is_type<std::result_of<const U2&(double)>, int>(), "Error!");
 355 static_assert(is_type<std::result_of<U2&(double)>, bool>(), "Error!");
 356 static_assert(is_type<std::result_of<U2(int)>, bool>(), "Error!");
 357 static_assert(is_type<std::result_of<U2&(int)>, bool>(), "Error!");
 358 static_assert(is_type<std::result_of<const U2&(int)>, int>(), "Error!");
 359 static_assert(is_type<std::result_of<U2(int, int)>, U>(), "Error!");
 360 static_assert(is_type<std::result_of<U2&(int, int)>, U>(), "Error!");
 361
 362 static_assert(!has_type<std::result_of<const U2&(int, int)>>(), "Error!");
 363 static_assert(!has_type<std::result_of<U2(int, int, int)>>(), "Error!");
 364 static_assert(!has_type<std::result_of<U2&(int, int, int)>>(), "Error!");
 365 static_assert(!has_type<std::result_of<const U2&(int, int, int)>>(), "Error!");
 366
 367 static_assert(is_type<std::result_of<ident_functor(int)>, int>(), "Error!");
 368 static_assert(is_type<std::result_of<ident_functor(const volatile int)>,
 369               int>(), "Error!");
 370 static_assert(is_type<std::result_of<ident_functor(int&)>, int&>(), "Error!");
 371 static_assert(is_type<std::result_of<ident_functor(const volatile int&)>,
 372               const volatile int&>(), "Error!");
 373 static_assert(is_type<std::result_of<ident_functor(int&&)>, int>(), "Error!");
 374 static_assert(is_type<std::result_of<ident_functor(const volatile int&&)>,
 375               int>(), "Error!");
 376 static_assert(is_type<std::result_of<ident_functor(Abstract&)>, Abstract&>(),
 377               "Error!");
 378 static_assert(is_type<std::result_of<ident_functor(const volatile Abstract&)>,
 379               const volatile Abstract&>(), "Error!");
 380
 381 static_assert(!has_type<std::result_of<ident_functor(int(&&)[1])>>(), "Error!");
 382 static_assert(!has_type<std::result_of<ident_functor(Abstract&&)>>(), "Error!");
 383 static_assert(!has_type<std::result_of<ident_functor(const int(&&)[1])>>(),
 384               "Error!");
 385 static_assert(!has_type<std::result_of<ident_functor(const Abstract&&)>>(),
 386               "Error!");
 387 static_assert(!has_type<std::result_of<ident_functor_noref(int(&)[1])>>(),
 388               "Error!");
 389 static_assert(!has_type<std::result_of<ident_functor_noref
 390               (const int(&)[1])>>(), "Error!");
 391 static_assert(!has_type<std::result_of<ident_functor_noref(Abstract&)>>(),
 392               "Error!");
 393 static_assert(!has_type<std::result_of
 394               <ident_functor_noref(const Abstract&)>>(), "Error!");
 395 static_assert(!has_type<std::result_of<ident_functor_noref(void(&)())>>(),
 396               "Error!");
 397 static_assert(!has_type<std::result_of<ident_functor_noref(void(&&)())>>(),
 398               "Error!");
 399
 400 static_assert(!has_type<std::result_of<ident_functor()>>(), "Error!");
 401 static_assert(!has_type<std::result_of<ident_functor(int, int)>>(), "Error!");
 402 static_assert(!has_type<std::result_of<const ident_functor&(int)>>(), "Error!");
 403 static_assert(!has_type<std::result_of<const ident_functor&&(int)>>(),
 404               "Error!");
 405
 406 // Border-line case:
 407 static_assert(!has_type<std::result_of<int S::*(Ukn*)>>(), "Error!");
 408 static_assert(!has_type<std::result_of<void (S::*(Ukn*))()>>(), "Error!");
 409
 410 // We want to allow this, it seems to be required by the order described
 411 // in [func.require] p1:
 412 static_assert(is_type<std::result_of<int S::*(BadSmartPtr<S>&)>, int&>(),
 413               "Error!");
 414
 415 static_assert(is_type<std::result_of<Private(std::nullptr_t)>, bool>(),
 416               "Error!");
 417 static_assert(is_type<std::result_of<Private&(std::nullptr_t)>, bool>(),
 418               "Error!");
 419 static_assert(is_type<std::result_of<Private&&(std::nullptr_t)>, bool>(),
 420               "Error!");
 421 static_assert(is_type<std::result_of<Private(ImplicitTo<std::nullptr_t>)>,
 422               bool>(), "Error!");
 423 static_assert(is_type<std::result_of<Private&(ImplicitTo<std::nullptr_t>)>,
 424               bool>(), "Error!");
 425 static_assert(is_type<std::result_of<Private&&(ImplicitTo<std::nullptr_t>)>,
 426               bool>(), "Error!");
 427
 428 static_assert(!has_type<std::result_of<const Private&(std::nullptr_t)>>(),
 429               "Error!");
 430 static_assert(!has_type<std::result_of<const Private&&(std::nullptr_t)>>(),
 431               "Error!");
 432 static_assert(!has_type<std::result_of<Private()>>(), "Error!");
 433 static_assert(!has_type<std::result_of<Private(int)>>(), "Error!");
 434 static_assert(!has_type<std::result_of<Private(int, int)>>(), "Error!");
 435 static_assert(!has_type<std::result_of<Private&()>>(), "Error!");
 436 static_assert(!has_type<std::result_of<Private&(int)>>(), "Error!");
 437 static_assert(!has_type<std::result_of<Private&(int, int)>>(), "Error!");
 438 static_assert(!has_type<std::result_of<const Private&()>>(), "Error!");
 439 static_assert(!has_type<std::result_of<const Private&(int)>>(), "Error!");
 440 static_assert(!has_type<std::result_of<const Private&(int, int)>>(), "Error!");
 441 static_assert(!has_type<std::result_of<Private&&()>>(), "Error!");
 442 static_assert(!has_type<std::result_of<Private&&(int)>>(), "Error!");
 443 static_assert(!has_type<std::result_of<Private&&(int, int)>>(), "Error!");
 444 static_assert(!has_type<std::result_of<const Private&&()>>(), "Error!");
 445 static_assert(!has_type<std::result_of<const Private&&(int)>>(), "Error!");
 446 static_assert(!has_type<std::result_of<const Private&&(int, int)>>(), "Error!");
 447
 448 static_assert(!has_type<std::result_of<Private(ScEn)>>(), "Error!");
 449 static_assert(!has_type<std::result_of<Private(UnScEn)>>(), "Error!");
 450 static_assert(!has_type<std::result_of<const Private&(ScEn)>>(), "Error!");
 451 static_assert(!has_type<std::result_of<const Private&(UnScEn)>>(), "Error!");
 452 static_assert(!has_type<std::result_of<Private(ImplicitTo<ScEn>)>>(), "Error!");
 453 static_assert(!has_type<std::result_of<Private(ImplicitTo<UnScEn>)>>(),
 454               "Error!");
 455 static_assert(!has_type<std::result_of<const Private&(ImplicitTo<ScEn>)>>(),
 456               "Error!");
 457 static_assert(!has_type<std::result_of<const Private&(ImplicitTo<UnScEn>)>>(),
 458               "Error!");
 459
 460 static_assert(is_type<std::result_of<PrivateUnion(std::nullptr_t)>, bool>(),
 461               "Error!");
 462 static_assert(is_type<std::result_of<PrivateUnion&(std::nullptr_t)>, bool>(),
 463               "Error!");
 464 static_assert(is_type<std::result_of<PrivateUnion&&(std::nullptr_t)>, bool>(),
 465               "Error!");
 466 static_assert(is_type<std::result_of<PrivateUnion(ImplicitTo<std::nullptr_t>)>,
 467               bool>(), "Error!");
 468 static_assert(is_type<std::result_of
 469               <PrivateUnion&(ImplicitTo<std::nullptr_t>)>, bool>(), "Error!");
 470 static_assert(is_type<std::result_of
 471               <PrivateUnion&&(ImplicitTo<std::nullptr_t>)>, bool>(), "Error!");
 472
 473 static_assert(!has_type<std::result_of<const PrivateUnion&(std::nullptr_t)>>(),
 474               "Error!");
 475 static_assert(!has_type<std::result_of
 476               <const PrivateUnion&&(std::nullptr_t)>>(), "Error!");
 477 static_assert(!has_type<std::result_of<PrivateUnion()>>(), "Error!");
 478 static_assert(!has_type<std::result_of<PrivateUnion(int)>>(), "Error!");
 479 static_assert(!has_type<std::result_of<PrivateUnion(int, int)>>(), "Error!");
 480 static_assert(!has_type<std::result_of<PrivateUnion&()>>(), "Error!");
 481 static_assert(!has_type<std::result_of<PrivateUnion&(int)>>(), "Error!");
 482 static_assert(!has_type<std::result_of<PrivateUnion&(int, int)>>(), "Error!");
 483 static_assert(!has_type<std::result_of<const PrivateUnion&()>>(), "Error!");
 484 static_assert(!has_type<std::result_of<const PrivateUnion&(int)>>(), "Error!");
 485 static_assert(!has_type<std::result_of<const PrivateUnion&(int, int)>>(),
 486               "Error!");
 487 static_assert(!has_type<std::result_of<PrivateUnion&&()>>(), "Error!");
 488 static_assert(!has_type<std::result_of<PrivateUnion&&(int)>>(), "Error!");
 489 static_assert(!has_type<std::result_of<PrivateUnion&&(int, int)>>(), "Error!");
 490 static_assert(!has_type<std::result_of<const PrivateUnion&&()>>(), "Error!");
 491 static_assert(!has_type<std::result_of<const PrivateUnion&&(int)>>(), "Error!");
 492 static_assert(!has_type<std::result_of<const PrivateUnion&&(int, int)>>(),
 493               "Error!");
 494
 495 static_assert(!has_type<std::result_of<PrivateUnion(ScEn)>>(), "Error!");
 496 static_assert(!has_type<std::result_of<PrivateUnion(UnScEn)>>(), "Error!");
 497 static_assert(!has_type<std::result_of<const PrivateUnion&(ScEn)>>(), "Error!");
 498 static_assert(!has_type<std::result_of<const PrivateUnion&(UnScEn)>>(),
 499               "Error!");
 500 static_assert(!has_type<std::result_of<PrivateUnion(ImplicitTo<ScEn>)>>(),
 501               "Error!");
 502 static_assert(!has_type<std::result_of<PrivateUnion(ImplicitTo<UnScEn>)>>(),
 503               "Error!");
 504 static_assert(!has_type<std::result_of
 505               <const PrivateUnion&(ImplicitTo<ScEn>)>>(), "Error!");
 506 static_assert(!has_type<std::result_of
 507               <const PrivateUnion&(ImplicitTo<UnScEn>)>>(), "Error!");
 508
 509 static_assert(is_type<std::result_of<void(*(bool))(int)>, void>(), "Error!");
 510 static_assert(is_type<std::result_of<void(*(UnScEn))(int)>, void>(), "Error!");
 511 static_assert(is_type<std::result_of<void(*(ImplicitTo<int>))(int)>, void>(),
 512               "Error!");
 513 static_assert(is_type<std::result_of<void(*(ImplicitTo<int>&))(int)>, void>(),
 514               "Error!");
 515 static_assert(is_type<std::result_of<void(*(ImplicitTo<int>&&))(int)>, void>(),
 516               "Error!");
 517
 518 static_assert(!has_type<std::result_of<void(*(ScEn))(int)>>(), "Error!");
 519 static_assert(!has_type<std::result_of
 520               <void(*(const ImplicitTo<int>&))(int)>>(), "Error!");
 521 static_assert(!has_type<std::result_of
 522               <void(*(const ImplicitTo<int>&&))(int)>>(), "Error!");
 523
 524 static_assert(is_type<std::result_of<ImplicitTo<void(*)()>()>, void>(),
 525               "Error!");
 526 static_assert(is_type<std::result_of<ImplicitTo<void(&)()>()>, void>(),
 527               "Error!");
 528
 529 static_assert(!has_type<std::result_of<ImplicitTo<void(*)()>(int)>>(),
 530               "Error!");
 531 static_assert(!has_type<std::result_of<ImplicitTo<void(*)(int)>()>>(),
 532               "Error!");
 533 static_assert(!has_type<std::result_of<ImplicitTo<void(&)()>(int)>>(),
 534               "Error!");
 535 static_assert(!has_type<std::result_of<ImplicitTo<void(&)(int)>()>>(),
 536               "Error!");
 537
 538 // Conversion operators of types are not considered in call expressions
 539 // (except for conversion to function pointer/reference):
 540 static_assert(!has_type<std::result_of<ImplicitTo<S>(char, int&)>>(), "Error!");
 541 static_assert(!has_type<std::result_of<ImplicitTo<ident_functor>(int)>>(),
 542               "Error!");
 543
 544 static_assert(is_type<std::result_of<variable_functor<>()>, void>(), "Error!");
 545 static_assert(is_type<std::result_of<variable_functor<>(int)>, void>(),
 546               "Error!");
 547 static_assert(is_type<std::result_of<variable_functor<>(int, int)>, void>(),
 548               "Error!");
 549 static_assert(is_type<std::result_of<variable_functor<>(int, int, int)>,
 550               void>(), "Error!");
 551
 552 static_assert(is_type<std::result_of<variable_functor<>&()>, void>(), "Error!");
 553 static_assert(is_type<std::result_of<variable_functor<>&(int)>, void>(),
 554               "Error!");
 555 static_assert(is_type<std::result_of<variable_functor<>&(int, int)>, void>(),
 556               "Error!");
 557 static_assert(is_type<std::result_of<variable_functor<>&(int, int, int)>,
 558               void>(), "Error!");
 559
 560 static_assert(!has_type<std::result_of<const variable_functor<>()>>(),
 561               "Error!");
 562 static_assert(!has_type<std::result_of<const variable_functor<>(int)>>(),
 563               "Error!");
 564 static_assert(!has_type<std::result_of<const variable_functor<>(int, int)>>(),
 565               "Error!");
 566 static_assert(!has_type<std::result_of
 567               <const variable_functor<>(int, int, int)>>(), "Error!");
 568
 569 static_assert(!has_type<std::result_of<const variable_functor<>&()>>(),
 570               "Error!");
 571 static_assert(!has_type<std::result_of<const variable_functor<>&(int)>>(),
 572               "Error!");
 573 static_assert(!has_type<std::result_of
 574               <const variable_functor<>&(int, int)>>(), "Error!");
 575 static_assert(!has_type<std::result_of
 576               <const variable_functor<>&(int, int, int)>>(), "Error!");
 577
 578 static_assert(is_type<std::result_of<variable_functor<S>()>, S>(), "Error!");
 579 static_assert(is_type<std::result_of<variable_functor<S>(int)>, S>(), "Error!");
 580 static_assert(is_type<std::result_of<variable_functor<S>(int, int)>, S>(),
 581               "Error!");
 582 static_assert(is_type<std::result_of<variable_functor<S>(int, int, int)>, S>(),
 583               "Error!");
 584
 585 static_assert(is_type<std::result_of<variable_functor<S>&()>, S>(), "Error!");
 586 static_assert(is_type<std::result_of<variable_functor<S>&(int)>, S>(),
 587               "Error!");
 588 static_assert(is_type<std::result_of<variable_functor<S>&(int, int)>, S>(),
 589               "Error!");
 590 static_assert(is_type<std::result_of
 591               <variable_functor<S>&(int, int, int)>, S>(), "Error!");
 592
 593 static_assert(!has_type<std::result_of
 594               <const variable_functor<S>()>>(), "Error!");
 595 static_assert(!has_type<std::result_of
 596               <const variable_functor<S>(int)>>(), "Error!");
 597 static_assert(!has_type<std::result_of
 598               <const variable_functor<S>(int, int)>>(), "Error!");
 599 static_assert(!has_type<std::result_of
 600               <const variable_functor<S>(int, int, int)>>(), "Error!");
 601
 602 static_assert(!has_type<std::result_of<const variable_functor<S>&()>>(),
 603               "Error!");
 604 static_assert(!has_type<std::result_of<const variable_functor<S>&(int)>>(),
 605               "Error!");
 606 static_assert(!has_type<std::result_of
 607               <const variable_functor<S>&(int, int)>>(), "Error!");
 608 static_assert(!has_type<std::result_of
 609               <const variable_functor<S>&(int, int, int)>>(), "Error!");
 610
 611 #if defined(HAS_52748_FIXED)
 612 static_assert(has_type<std::result_of<variable_functor<Ukn>()>>(), "Error!");
 613 static_assert(is_type<std::result_of<variable_functor<Ukn>()>, Ukn>(),
 614               "Error!");
 615 static_assert(is_type<std::result_of<variable_functor<Ukn>(int)>, Ukn>(),
 616               "Error!");
 617 static_assert(is_type<std::result_of<variable_functor<Ukn>(int, int)>, Ukn>(),
 618               "Error!");
 619 static_assert(is_type<std::result_of
 620               <variable_functor<Ukn>(int, int, int)>, Ukn>(), "Error!");
 621
 622 static_assert(is_type<std::result_of<variable_functor<Ukn>&()>, Ukn>(),
 623               "Error!");
 624 static_assert(is_type<std::result_of<variable_functor<Ukn>&(int)>, Ukn>(),
 625               "Error!");
 626 static_assert(is_type<std::result_of
 627               <variable_functor<Ukn>&(int, int)>, Ukn>(), "Error!");
 628 static_assert(is_type<std::result_of
 629               <variable_functor<Ukn>&(int, int, int)>, Ukn>(), "Error!");
 630
 631 static_assert(is_type<std::result_of<PMSIncomplete(S*, int)>, Ukn>(), "Error!");
 632 static_assert(is_type<std::result_of<PMSIncomplete&(const S&, int)>, Ukn>(), "Error!");
 633 static_assert(is_type<std::result_of<PMSIncomplete&&(S&&, int)>, Ukn>(), "Error!");
 634
 635 static_assert(is_type<std::result_of<FuncIncomplete(int)>, Ukn>(), "Error!");
 636 static_assert(is_type<std::result_of<FuncIncomplete&(int)>, Ukn>(), "Error!");
 637 static_assert(is_type<std::result_of<FuncIncomplete&&(int)>, Ukn>(), "Error!");
 638
 639 static_assert(is_type<std::result_of<FuncEllipses<Ukn>*()>, Ukn>(), "Error!");
 640 static_assert(is_type<std::result_of<FuncEllipses<Ukn>&()>, Ukn>(), "Error!");
 641 static_assert(is_type<std::result_of<FuncEllipses<Ukn>&&()>, Ukn>(), "Error!");
 642
 643 static_assert(is_type<std::result_of<FuncEllipses<Ukn>*(bool)>, Ukn>(),
 644               "Error!");
 645 static_assert(is_type<std::result_of<FuncEllipses<Ukn>&(bool)>, Ukn>(),
 646               "Error!");
 647 static_assert(is_type<std::result_of<FuncEllipses<Ukn>&&(bool)>, Ukn>(),
 648               "Error!");
 649
 650 static_assert(is_type<std::result_of<FuncEllipses<Ukn>*(bool, int, S)>, Ukn>(),
 651               "Error!");
 652 static_assert(is_type<std::result_of<FuncEllipses<Ukn>&(bool, int, S)>, Ukn>(),
 653               "Error!");
 654 static_assert(is_type<std::result_of
 655               <FuncEllipses<Ukn>&&(bool, int, S)>, Ukn>(), "Error!");
 656
 657 static_assert(!has_type<std::result_of<PMSIncompletenonconst(const S*)>>(),
 658               "Error!");
 659 static_assert(!has_type<std::result_of
 660               <PMSIncompletenonconst(const S*, int)>>(), "Error!");
 661 static_assert(!has_type<std::result_of
 662               <PMSIncompletenonconst(const S*, int, int)>>(), "Error!");
 663 static_assert(!has_type<std::result_of
 664               <PMSIncompletenonconst(const S*, int, int, int)>>(), "Error!");
 665 static_assert(!has_type<std::result_of
 666               <PMSIncompletenonconst(const S*&)>>(), "Error!");
 667 static_assert(!has_type<std::result_of
 668               <PMSIncompletenonconst(const S*&, int)>>(), "Error!");
 669 static_assert(!has_type<std::result_of
 670               <PMSIncompletenonconst(const S*&, int, int)>>(), "Error!");
 671 static_assert(!has_type<std::result_of
 672               <PMSIncompletenonconst(const S*&, int, int, int)>>(), "Error!");
 673
 674 static_assert(!has_type<std::result_of
 675               <PMSIncompletenonconst(const S&)>>(), "Error!");
 676 static_assert(!has_type<std::result_of
 677               <PMSIncompletenonconst(const S&, int)>>(), "Error!");
 678 static_assert(!has_type<std::result_of
 679               <PMSIncompletenonconst(const S&, int, int)>>(), "Error!");
 680 static_assert(!has_type<std::result_of
 681               <PMSIncompletenonconst(const S&, int, int, int)>>(), "Error!");
 682 static_assert(!has_type<std::result_of
 683               <PMSIncompletenonconst(const S&&)>>(), "Error!");
 684 static_assert(!has_type<std::result_of
 685               <PMSIncompletenonconst(const S&&, int)>>(), "Error!");
 686 static_assert(!has_type<std::result_of
 687               <PMSIncompletenonconst(const S&&, int, int)>>(), "Error!");
 688 static_assert(!has_type<std::result_of
 689               <PMSIncompletenonconst(const S&&, int, int, int)>>(), "Error!");
 690 #endif
 691
 692 static_assert(!has_type<std::result_of<const variable_functor<Ukn>()>>(),
 693               "Error!");
 694 static_assert(!has_type<std::result_of<const variable_functor<Ukn>(int)>>(),
 695               "Error!");
 696 static_assert(!has_type<std::result_of
 697               <const variable_functor<Ukn>(int, int)>>(), "Error!");
 698 static_assert(!has_type<std::result_of
 699               <const variable_functor<Ukn>(int, int, int)>>(), "Error!");
 700
 701 static_assert(!has_type<std::result_of<const variable_functor<Ukn>&()>>(),
 702               "Error!");
 703 static_assert(!has_type<std::result_of<const variable_functor<Ukn>&(int)>>(),
 704               "Error!");
 705 static_assert(!has_type<std::result_of
 706               <const variable_functor<Ukn>&(int, int)>>(), "Error!");
 707 static_assert(!has_type<std::result_of
 708               <const variable_functor<Ukn>&(int, int, int)>>(), "Error!");
 709
 710 static_assert(!has_type<std::result_of<FuncIncomplete()>>(), "Error!");
 711 static_assert(!has_type<std::result_of<FuncIncomplete(S)>>(), "Error!");
 712 static_assert(!has_type<std::result_of<FuncIncomplete(int, int)>>(), "Error!");
 713 static_assert(!has_type<std::result_of<FuncIncomplete(int, int, int)>>(),
 714               "Error!");
 715
 716 static_assert(!has_type<std::result_of<FuncIncomplete&&()>>(), "Error!");
 717 static_assert(!has_type<std::result_of<FuncIncomplete&&(S)>>(), "Error!");
 718 static_assert(!has_type<std::result_of<FuncIncomplete&&(int, int)>>(),
 719               "Error!");
 720 static_assert(!has_type<std::result_of<FuncIncomplete&&(int, int, int)>>(),
 721               "Error!");
 722
 723 static_assert(is_type<std::result_of<FuncEllipses<int>*()>, int>(), "Error!");
 724 static_assert(is_type<std::result_of<FuncEllipses<int>&()>, int>(), "Error!");
 725 static_assert(is_type<std::result_of<FuncEllipses<int>&&()>, int>(), "Error!");
 726
 727 static_assert(is_type<std::result_of<FuncEllipses<int>*(bool)>, int>(),
 728               "Error!");
 729 static_assert(is_type<std::result_of<FuncEllipses<int>&(bool)>, int>(),
 730               "Error!");
 731 static_assert(is_type<std::result_of<FuncEllipses<int>&&(bool)>, int>(),
 732               "Error!");
 733
 734 static_assert(is_type<std::result_of<FuncEllipses<int>*(bool, int, S)>, int>(),
 735               "Error!");
 736 static_assert(is_type<std::result_of<FuncEllipses<int>&(bool, int, S)>, int>(),
 737               "Error!");
 738 static_assert(is_type<std::result_of
 739               <FuncEllipses<int>&&(bool, int, S)>, int>(), "Error!");
 740