| 1 | // RUN: %clang_cc1 -fsyntax-only -std=c++98 -Wconversion -verify %s |
| 2 | template<int N> struct A; // expected-note 5{{template parameter is declared here}} |
| 3 | |
| 4 | A<0> *a0; |
| 5 | |
| 6 | A<int()> *a1; // expected-error{{template argument for non-type template parameter is treated as function type 'int ()'}} |
| 7 | |
| 8 | A<int> *a2; // expected-error{{template argument for non-type template parameter must be an expression}} |
| 9 | |
| 10 | A<1 >> 2> *a3; // expected-warning{{use of right-shift operator ('>>') in template argument will require parentheses in C++11}} |
| 11 | |
| 12 | // C++ [temp.arg.nontype]p5: |
| 13 | A<A> *a4; // expected-error{{must be an expression}} |
| 14 | |
| 15 | enum E { Enumerator = 17 }; |
| 16 | A<E> *a5; // expected-error{{template argument for non-type template parameter must be an expression}} |
| 17 | template<E Value> struct A1; // expected-note{{template parameter is declared here}} |
| 18 | A1<Enumerator> *a6; // okay |
| 19 | A1<17> *a7; // expected-error{{non-type template argument of type 'int' cannot be converted to a value of type 'E'}} |
| 20 | |
| 21 | const long LongValue = 12345678; |
| 22 | A<LongValue> *a8; |
| 23 | const short ShortValue = 17; |
| 24 | A<ShortValue> *a9; |
| 25 | |
| 26 | int f(int); |
| 27 | A<f(17)> *a10; // expected-error{{non-type template argument of type 'int' is not an integral constant expression}} |
| 28 | |
| 29 | class X { |
| 30 | public: |
| 31 | X(); |
| 32 | X(int, int); |
| 33 | operator int() const; |
| 34 | }; |
| 35 | A<X(17, 42)> *a11; // expected-error{{non-type template argument of type 'X' must have an integral or enumeration type}} |
| 36 | |
| 37 | float f(float); |
| 38 | |
| 39 | float g(float); // expected-note 2{{candidate function}} |
| 40 | double g(double); // expected-note 2{{candidate function}} |
| 41 | |
| 42 | int h(int); |
| 43 | float h2(float); |
| 44 | |
| 45 | template<int fp(int)> struct A3; // expected-note 1{{template parameter is declared here}} |
| 46 | A3<h> *a14_1; |
| 47 | A3<&h> *a14_2; |
| 48 | A3<f> *a14_3; |
| 49 | A3<&f> *a14_4; |
| 50 | A3<h2> *a14_6; // expected-error{{non-type template argument of type 'float (float)' cannot be converted to a value of type 'int (*)(int)'}} |
| 51 | A3<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}} |
| 52 | |
| 53 | |
| 54 | struct Y { } y; |
| 55 | |
| 56 | volatile X * X_volatile_ptr; |
| 57 | template<X const &AnX> struct A4; // expected-note 2{{template parameter is declared here}} |
| 58 | X an_X; |
| 59 | A4<an_X> *a15_1; // okay |
| 60 | A4<*X_volatile_ptr> *a15_2; // expected-error{{non-type template argument does not refer to any declaration}} |
| 61 | A4<y> *15_3; // expected-error{{non-type template parameter of reference type 'const X &' cannot bind to template argument of type 'struct Y'}} \ |
| 62 | // FIXME: expected-error{{expected unqualified-id}} |
| 63 | |
| 64 | template<int (&fr)(int)> struct A5; // expected-note{{template parameter is declared here}} |
| 65 | A5<h> *a16_1; |
| 66 | A5<f> *a16_3; |
| 67 | A5<h2> *a16_6; // expected-error{{non-type template parameter of reference type 'int (&)(int)' cannot bind to template argument of type 'float (float)'}} |
| 68 | A5<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}} |
| 69 | |
| 70 | struct Z { |
| 71 | int foo(int); |
| 72 | float bar(float); |
| 73 | int bar(int); |
| 74 | double baz(double); |
| 75 | |
| 76 | int int_member; |
| 77 | float float_member; |
| 78 | union { |
| 79 | int union_member; |
| 80 | }; |
| 81 | }; |
| 82 | template<int (Z::*pmf)(int)> struct A6; // expected-note{{template parameter is declared here}} |
| 83 | A6<&Z::foo> *a17_1; |
| 84 | A6<&Z::bar> *a17_2; |
| 85 | A6<&Z::baz> *a17_3; // expected-error-re{{non-type template argument of type 'double (Z::*)(double){{( __attribute__\(\(thiscall\)\))?}}' cannot be converted to a value of type 'int (Z::*)(int){{( __attribute__\(\(thiscall\)\))?}}'}} |
| 86 | |
| 87 | |
| 88 | template<int Z::*pm> struct A7; // expected-note{{template parameter is declared here}} |
| 89 | template<int Z::*pm> struct A7c; |
| 90 | A7<&Z::int_member> *a18_1; |
| 91 | A7c<&Z::int_member> *a18_2; |
| 92 | A7<&Z::float_member> *a18_3; // expected-error{{non-type template argument of type 'float Z::*' cannot be converted to a value of type 'int Z::*'}} |
| 93 | A7c<(&Z::int_member)> *a18_4; // expected-warning{{address non-type template argument cannot be surrounded by parentheses}} |
| 94 | A7c<&Z::union_member> *a18_5; |
| 95 | |
| 96 | template<unsigned char C> struct Overflow; // expected-note{{template parameter is declared here}} |
| 97 | |
| 98 | Overflow<5> *overflow1; // okay |
| 99 | Overflow<255> *overflow2; // okay |
| 100 | Overflow<256> *overflow3; // expected-warning{{non-type template argument value '256' truncated to '0' for template parameter of type 'unsigned char'}} |
| 101 | |
| 102 | |
| 103 | template<unsigned> struct Signedness; // expected-note{{template parameter is declared here}} |
| 104 | Signedness<10> *signedness1; // okay |
| 105 | Signedness<-10> *signedness2; // expected-warning{{non-type template argument with value '-10' converted to '4294967286' for unsigned template parameter of type 'unsigned int'}} |
| 106 | |
| 107 | template<signed char C> struct SignedOverflow; // expected-note 3 {{template parameter is declared here}} |
| 108 | SignedOverflow<1> *signedoverflow1; |
| 109 | SignedOverflow<-1> *signedoverflow2; |
| 110 | SignedOverflow<-128> *signedoverflow3; |
| 111 | SignedOverflow<-129> *signedoverflow4; // expected-warning{{non-type template argument value '-129' truncated to '127' for template parameter of type 'signed char'}} |
| 112 | SignedOverflow<127> *signedoverflow5; |
| 113 | SignedOverflow<128> *signedoverflow6; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}} |
| 114 | SignedOverflow<(unsigned char)128> *signedoverflow7; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}} |
| 115 | |
| 116 | // Check canonicalization of template arguments. |
| 117 | template<int (*)(int, int)> struct FuncPtr0; |
| 118 | int func0(int, int); |
| 119 | extern FuncPtr0<&func0> *fp0; |
| 120 | template<int (*)(int, int)> struct FuncPtr0; |
| 121 | extern FuncPtr0<&func0> *fp0; |
| 122 | int func0(int, int); |
| 123 | extern FuncPtr0<&func0> *fp0; |
| 124 | |
| 125 | // PR5350 |
| 126 | namespace ns { |
| 127 | template <typename T> |
| 128 | struct Foo { |
| 129 | static const bool value = true; |
| 130 | }; |
| 131 | |
| 132 | template <bool b> |
| 133 | struct Bar {}; |
| 134 | |
| 135 | const bool value = false; |
| 136 | |
| 137 | Bar<bool(ns::Foo<int>::value)> x; |
| 138 | } |
| 139 | |
| 140 | // PR5349 |
| 141 | namespace ns { |
| 142 | enum E { k }; |
| 143 | |
| 144 | template <E e> |
| 145 | struct Baz {}; |
| 146 | |
| 147 | Baz<k> f1; // This works. |
| 148 | Baz<E(0)> f2; // This too. |
| 149 | Baz<static_cast<E>(0)> f3; // And this. |
| 150 | |
| 151 | Baz<ns::E(0)> b1; // This doesn't work. |
| 152 | Baz<static_cast<ns::E>(0)> b2; // This neither. |
| 153 | } |
| 154 | |
| 155 | // PR5597 |
| 156 | template<int (*)(float)> struct X0 { }; |
| 157 | |
| 158 | struct X1 { |
| 159 | static int pfunc(float); |
| 160 | }; |
| 161 | void test_X0_X1() { |
| 162 | X0<X1::pfunc> x01; |
| 163 | } |
| 164 | |
| 165 | // PR6249 |
| 166 | namespace pr6249 { |
| 167 | template<typename T, T (*func)()> T f() { |
| 168 | return func(); |
| 169 | } |
| 170 | |
| 171 | int h(); |
| 172 | template int f<int, h>(); |
| 173 | } |
| 174 | |
| 175 | namespace PR6723 { |
| 176 | template<unsigned char C> void f(int (&a)[C]); // expected-note 3{{candidate template ignored: substitution failure [with C = '\x00']}} |
| 177 | // expected-note@-1 {{not viable: no known conversion from 'int [512]' to 'int (&)[0]'}} |
| 178 | void g() { |
| 179 | int arr512[512]; |
| 180 | f(arr512); // expected-error{{no matching function for call}} |
| 181 | f<512>(arr512); // expected-error{{no matching function for call}} |
| 182 | |
| 183 | int arr0[0]; |
| 184 | f(arr0); // expected-error{{no matching function for call}} |
| 185 | f<0>(arr0); // expected-error{{no matching function for call}} |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | // Check that we instantiate declarations whose addresses are taken |
| 190 | // for non-type template arguments. |
| 191 | namespace EntityReferenced { |
| 192 | template<typename T, void (*)(T)> struct X { }; |
| 193 | |
| 194 | template<typename T> |
| 195 | struct Y { |
| 196 | static void f(T x) { |
| 197 | x = 1; // expected-error{{assigning to 'int *' from incompatible type 'int'}} |
| 198 | } |
| 199 | }; |
| 200 | |
| 201 | void g() { |
| 202 | typedef X<int*, Y<int*>::f> x; // expected-note{{in instantiation of}} |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | namespace PR6964 { |
| 207 | template <typename ,int, int = 9223372036854775807L > // expected-warning 2{{non-type template argument value '9223372036854775807' truncated to '-1' for template parameter of type 'int'}} \ |
| 208 | // expected-note 2{{template parameter is declared here}} |
| 209 | struct as_nview { }; |
| 210 | |
| 211 | template <typename Sequence, int I0> |
| 212 | struct as_nview<Sequence, I0> // expected-note{{while checking a default template argument used here}} |
| 213 | { }; |
| 214 | } |
| 215 | |
| 216 | // rdar://problem/8302138 |
| 217 | namespace test8 { |
| 218 | template <int* ip> struct A { |
| 219 | int* p; |
| 220 | A() : p(ip) {} |
| 221 | }; |
| 222 | |
| 223 | void test0() { |
| 224 | extern int i00; |
| 225 | A<&i00> a00; |
| 226 | } |
| 227 | |
| 228 | extern int i01; |
| 229 | void test1() { |
| 230 | A<&i01> a01; |
| 231 | } |
| 232 | |
| 233 | |
| 234 | struct C { |
| 235 | int x; |
| 236 | char y; |
| 237 | double z; |
| 238 | }; |
| 239 | |
| 240 | template <C* cp> struct B { |
| 241 | C* p; |
| 242 | B() : p(cp) {} |
| 243 | }; |
| 244 | |
| 245 | void test2() { |
| 246 | extern C c02; |
| 247 | B<&c02> b02; |
| 248 | } |
| 249 | |
| 250 | extern C c03; |
| 251 | void test3() { |
| 252 | B<&c03> b03; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | namespace PR8372 { |
| 257 | template <int I> void foo() { } // expected-note{{template parameter is declared here}} |
| 258 | void bar() { foo <0x80000000> (); } // expected-warning{{non-type template argument value '2147483648' truncated to '-2147483648' for template parameter of type 'int'}} |
| 259 | } |
| 260 | |
| 261 | namespace PR9227 { |
| 262 | template <bool B> struct enable_if_bool { }; |
| 263 | template <> struct enable_if_bool<true> { typedef int type; }; // expected-note{{'enable_if_bool<true>::type' declared here}} |
| 264 | void test_bool() { enable_if_bool<false>::type i; } // expected-error{{enable_if_bool<false>'; did you mean 'enable_if_bool<true>::type'?}} |
| 265 | |
| 266 | template <char C> struct enable_if_char { }; |
| 267 | template <> struct enable_if_char<'a'> { typedef int type; }; // expected-note 5{{'enable_if_char<'a'>::type' declared here}} |
| 268 | void test_char_0() { enable_if_char<0>::type i; } // expected-error{{enable_if_char<'\x00'>'; did you mean 'enable_if_char<'a'>::type'?}} |
| 269 | void test_char_b() { enable_if_char<'b'>::type i; } // expected-error{{enable_if_char<'b'>'; did you mean 'enable_if_char<'a'>::type'?}} |
| 270 | void test_char_possibly_negative() { enable_if_char<'\x02'>::type i; } // expected-error{{enable_if_char<'\x02'>'; did you mean 'enable_if_char<'a'>::type'?}} |
| 271 | void test_char_single_quote() { enable_if_char<'\''>::type i; } // expected-error{{enable_if_char<'\''>'; did you mean 'enable_if_char<'a'>::type'?}} |
| 272 | void test_char_backslash() { enable_if_char<'\\'>::type i; } // expected-error{{enable_if_char<'\\'>'; did you mean 'enable_if_char<'a'>::type'?}} |
| 273 | } |
| 274 | |
| 275 | namespace PR10579 { |
| 276 | namespace fcppt |
| 277 | { |
| 278 | namespace container |
| 279 | { |
| 280 | namespace bitfield |
| 281 | { |
| 282 | |
| 283 | template< |
| 284 | typename Enum, |
| 285 | Enum Size |
| 286 | > |
| 287 | class basic; |
| 288 | |
| 289 | template< |
| 290 | typename Enum, |
| 291 | Enum Size |
| 292 | > |
| 293 | class basic |
| 294 | { |
| 295 | public: |
| 296 | basic() |
| 297 | { |
| 298 | } |
| 299 | }; |
| 300 | |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | namespace |
| 306 | { |
| 307 | |
| 308 | namespace testenum |
| 309 | { |
| 310 | enum type |
| 311 | { |
| 312 | foo, |
| 313 | bar, |
| 314 | size |
| 315 | }; |
| 316 | } |
| 317 | |
| 318 | } |
| 319 | |
| 320 | int main() |
| 321 | { |
| 322 | typedef fcppt::container::bitfield::basic< |
| 323 | testenum::type, |
| 324 | testenum::size |
| 325 | > bitfield_foo; |
| 326 | |
| 327 | bitfield_foo obj; |
| 328 | } |
| 329 | |
| 330 | } |
| 331 | |
| 332 | template <int& I> struct PR10766 { static int *ip; }; |
| 333 | template <int& I> int* PR10766<I>::ip = &I; |
| 334 | |
| 335 | namespace rdar13000548 { |
| 336 | template<typename R, typename U, R F> |
| 337 | U f() { return &F; } // expected-error{{cannot take the address of an rvalue of type 'int (*)(int)'}} expected-error{{cannot take the address of an rvalue of type 'int *'}} |
| 338 | |
| 339 | int g(int); |
| 340 | int y[3]; |
| 341 | void test() |
| 342 | { |
| 343 | f<int(int), int (*)(int), g>(); // expected-note{{in instantiation of}} |
| 344 | f<int[3], int*, y>(); // expected-note{{in instantiation of}} |
| 345 | } |
| 346 | |
| 347 | } |
| 348 | |
| 349 | namespace rdar13806270 { |
| 350 | template <unsigned N> class X { }; |
| 351 | const unsigned value = 32; |
| 352 | struct Y { |
| 353 | X<value + 1> x; |
| 354 | }; |
| 355 | void foo() {} |
| 356 | } |
| 357 | |
| 358 | namespace PR17696 { |
| 359 | struct a { |
| 360 | union { |
| 361 | int i; |
| 362 | }; |
| 363 | }; |
| 364 | |
| 365 | template <int (a::*p)> struct b : a { |
| 366 | b() { this->*p = 0; } |
| 367 | }; |
| 368 | |
| 369 | b<&a::i> c; // okay |
| 370 | } |
| 371 | |
| 372 | namespace partial_order_different_types { |
| 373 | template<int, int, typename T, typename, T> struct A; |
| 374 | template<int N, typename T, typename U, T V> struct A<0, N, T, U, V>; // expected-note {{matches}} |
| 375 | // FIXME: It appears that this partial specialization should be ill-formed as |
| 376 | // it is not more specialized than the primary template. V is not deducible |
| 377 | // because it does not have the same type as the corresponding parameter. |
| 378 | template<int N, typename T, typename U, U V> struct A<0, N, T, U, V> {}; // expected-note {{matches}} |
| 379 | A<0, 0, int, int, 0> a; // expected-error {{ambiguous}} |
| 380 | } |
| 381 | |
| 382 | namespace partial_order_references { |
| 383 | // FIXME: The standard does not appear to consider the second specialization |
| 384 | // to be more more specialized than the first! The problem is that deducing |
| 385 | // an 'int&' parameter from an argument 'R' results in a type mismatch, |
| 386 | // because the parameter has a reference type and the argument is an |
| 387 | // expression and thus does not have reference type. We resolve this by |
| 388 | // matching the type of an expression corresponding to the parameter rather |
| 389 | // than matching the parameter itself. |
| 390 | template <int, int, int &> struct A {}; |
| 391 | template <int N, int &R> struct A<N, 0, R> {}; |
| 392 | template <int &R> struct A<0, 0, R> {}; |
| 393 | int N; |
| 394 | A<0, 0, N> a; |
| 395 | |
| 396 | template<int, int &R> struct B; // expected-note 2{{template}} |
| 397 | template<const int &R> struct B<0, R> {}; |
| 398 | // expected-error@-1 {{not more specialized than the primary}} |
| 399 | // expected-note@-2 {{'const int' vs 'int &'}} |
| 400 | B<0, N> b; // expected-error {{undefined}} |
| 401 | |
| 402 | template<int, const int &R> struct C; // expected-note 2{{template}} |
| 403 | template<int &R> struct C<0, R> {}; |
| 404 | // expected-error@-1 {{not more specialized than the primary}} |
| 405 | // expected-note@-2 {{'int' vs 'const int &'}} |
| 406 | C<0, N> c; // expected-error {{undefined}} |
| 407 | |
| 408 | template<int, const int &R> struct D; // expected-note 2{{template}} |
| 409 | template<int N> struct D<0, N> {}; |
| 410 | // expected-error@-1 {{not more specialized than the primary}} |
| 411 | // expected-note@-2 {{'int' vs 'const int &'}} |
| 412 | extern const int K = 5; |
| 413 | D<0, K> d; // expected-error {{undefined}} |
| 414 | } |
| 415 | |
| 416 | namespace dependent_nested_partial_specialization { |
| 417 | template<typename> using X = int; // expected-warning {{C++11}} |
| 418 | template<typename T> using Y = T*; // expected-warning {{C++11}} |
| 419 | int n; |
| 420 | |
| 421 | template<template<typename> class X> struct A { |
| 422 | template<typename T, X<T> N> struct B; // expected-note 2{{here}} |
| 423 | template<typename T> struct B<T, 0> {}; // expected-error {{specializes a template parameter with dependent type 'Y<T>'}} |
| 424 | }; |
| 425 | A<X>::B<int, 0> ax; |
| 426 | A<Y>::B<int, &n> ay; // expected-error {{undefined}} expected-note {{instantiation of}} |
| 427 | |
| 428 | template<template<typename> class X> struct C { |
| 429 | template<typename T, int N, int M> struct D; // expected-note {{here}} |
| 430 | template<typename T, X<T> N> struct D<T*, N, N + 1> {}; // expected-error {{type of specialized non-type template argument depends on}} |
| 431 | }; |
| 432 | C<X>::D<int*, 0, 1> cx; |
| 433 | C<Y>::D<int*, 0, 1> cy; // expected-error {{undefined}} expected-note {{instantiation of}} |
| 434 | |
| 435 | template<typename T> struct E { |
| 436 | template<typename U, U V> struct F; // expected-note {{template}} |
| 437 | template<typename W, T V> struct F<W, V> {}; // expected-error {{not more specialized than the primary}} |
| 438 | }; |
| 439 | E<int>::F<int, 0> e1; // expected-note {{instantiation of}} |
| 440 | } |
| 441 | |
| 442 | namespace nondependent_default_arg_ordering { |
| 443 | int n, m; |
| 444 | template<typename A, A B = &n> struct X {}; |
| 445 | template<typename A> void f(X<A>); // expected-note {{candidate}} |
| 446 | template<typename A> void f(X<A, &m>); // expected-note {{candidate}} |
| 447 | template<typename A, A B> void f(X<A, B>); // expected-note 2{{candidate}} |
| 448 | template<template<typename U, U> class T, typename A, int *B> void f(T<A, B>); // expected-note 2{{candidate}} |
| 449 | void g() { |
| 450 | // FIXME: The first and second function templates above should be |
| 451 | // considered more specialized than the last two, but during partial |
| 452 | // ordering we fail to check that we actually deduced template arguments |
| 453 | // that make the deduced A identical to A. |
| 454 | X<int *, &n> x; f(x); // expected-error {{ambiguous}} |
| 455 | X<int *, &m> y; f(y); // expected-error {{ambiguous}} |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | namespace pointer_to_char_array { |
| 460 | typedef char T[4]; |
| 461 | template<T *P> struct A { void f(); }; |
| 462 | template<T *P> void A<P>::f() {} |
| 463 | T foo = "foo"; |
| 464 | void g() { A<&foo>().f(); } |
| 465 | } |
| 466 | |