1// RUN: %clang_cc1 -fsyntax-only -std=c++98 -Wconversion -verify %s 2template<int N> struct A; // expected-note 5{{template parameter is declared here}} 3 4A<0> *a0; 5 6A<int()> *a1; // expected-error{{template argument for non-type template parameter is treated as type 'int ()'}} 7 8A<int> *a2; // expected-error{{template argument for non-type template parameter must be an expression}} 9 10A<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: 13A<A> *a4; // expected-error{{must be an expression}} 14 15enum E { Enumerator = 17 }; 16A<E> *a5; // expected-error{{template argument for non-type template parameter must be an expression}} 17template<E Value> struct A1; // expected-note{{template parameter is declared here}} 18A1<Enumerator> *a6; // okay 19A1<17> *a7; // expected-error{{non-type template argument of type 'int' cannot be converted to a value of type 'E'}} 20 21const long LongValue = 12345678; 22A<LongValue> *a8; 23const short ShortValue = 17; 24A<ShortValue> *a9; 25 26int f(int); 27A<f(17)> *a10; // expected-error{{non-type template argument of type 'int' is not an integral constant expression}} 28 29class X { 30public: 31 X(); 32 X(int, int); 33 operator int() const; 34}; 35A<X(17, 42)> *a11; // expected-error{{non-type template argument of type 'X' must have an integral or enumeration type}} 36 37float f(float); 38 39float g(float); // expected-note 2{{candidate function}} 40double g(double); // expected-note 2{{candidate function}} 41 42int h(int); 43float h2(float); 44 45template<int fp(int)> struct A3; // expected-note 1{{template parameter is declared here}} 46A3<h> *a14_1; 47A3<&h> *a14_2; 48A3<f> *a14_3; 49A3<&f> *a14_4; 50A3<h2> *a14_6; // expected-error{{non-type template argument of type 'float (float)' cannot be converted to a value of type 'int (*)(int)'}} 51A3<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}} 52 53 54struct Y { } y; 55 56volatile X * X_volatile_ptr; 57template<X const &AnX> struct A4; // expected-note 2{{template parameter is declared here}} 58X an_X; 59A4<an_X> *a15_1; // okay 60A4<*X_volatile_ptr> *a15_2; // expected-error{{non-type template argument does not refer to any declaration}} 61A4<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 64template<int (&fr)(int)> struct A5; // expected-note{{template parameter is declared here}} 65A5<h> *a16_1; 66A5<f> *a16_3; 67A5<h2> *a16_6; // expected-error{{non-type template parameter of reference type 'int (&)(int)' cannot bind to template argument of type 'float (float)'}} 68A5<g> *a14_7; // expected-error{{address of overloaded function 'g' does not match required type 'int (int)'}} 69 70struct 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}; 79template<int (Z::*pmf)(int)> struct A6; // expected-note{{template parameter is declared here}} 80A6<&Z::foo> *a17_1; 81A6<&Z::bar> *a17_2; 82A6<&Z::baz> *a17_3; // expected-error{{non-type template argument of type 'double (Z::*)(double)' cannot be converted to a value of type 'int (Z::*)(int)'}} 83 84 85template<int Z::*pm> struct A7; // expected-note{{template parameter is declared here}} 86template<int Z::*pm> struct A7c; 87A7<&Z::int_member> *a18_1; 88A7c<&Z::int_member> *a18_2; 89A7<&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::*'}} 90A7c<(&Z::int_member)> *a18_4; // expected-warning{{address non-type template argument cannot be surrounded by parentheses}} 91 92template<unsigned char C> struct Overflow; // expected-note{{template parameter is declared here}} 93 94Overflow<5> *overflow1; // okay 95Overflow<255> *overflow2; // okay 96Overflow<256> *overflow3; // expected-warning{{non-type template argument value '256' truncated to '0' for template parameter of type 'unsigned char'}} 97 98 99template<unsigned> struct Signedness; // expected-note{{template parameter is declared here}} 100Signedness<10> *signedness1; // okay 101Signedness<-10> *signedness2; // expected-warning{{non-type template argument with value '-10' converted to '4294967286' for unsigned template parameter of type 'unsigned int'}} 102 103template<signed char C> struct SignedOverflow; // expected-note 3 {{template parameter is declared here}} 104SignedOverflow<1> *signedoverflow1; 105SignedOverflow<-1> *signedoverflow2; 106SignedOverflow<-128> *signedoverflow3; 107SignedOverflow<-129> *signedoverflow4; // expected-warning{{non-type template argument value '-129' truncated to '127' for template parameter of type 'signed char'}} 108SignedOverflow<127> *signedoverflow5; 109SignedOverflow<128> *signedoverflow6; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}} 110SignedOverflow<(unsigned char)128> *signedoverflow7; // expected-warning{{non-type template argument value '128' truncated to '-128' for template parameter of type 'signed char'}} 111 112// Check canonicalization of template arguments. 113template<int (*)(int, int)> struct FuncPtr0; 114int func0(int, int); 115extern FuncPtr0<&func0> *fp0; 116template<int (*)(int, int)> struct FuncPtr0; 117extern FuncPtr0<&func0> *fp0; 118int func0(int, int); 119extern FuncPtr0<&func0> *fp0; 120 121// PR5350 122namespace ns { 123 template <typename T> 124 struct Foo { 125 static const bool value = true; 126 }; 127 128 template <bool b> 129 struct Bar {}; 130 131 const bool value = false; 132 133 Bar<bool(ns::Foo<int>::value)> x; 134} 135 136// PR5349 137namespace ns { 138 enum E { k }; 139 140 template <E e> 141 struct Baz {}; 142 143 Baz<k> f1; // This works. 144 Baz<E(0)> f2; // This too. 145 Baz<static_cast<E>(0)> f3; // And this. 146 147 Baz<ns::E(0)> b1; // This doesn't work. 148 Baz<static_cast<ns::E>(0)> b2; // This neither. 149} 150 151// PR5597 152template<int (*)(float)> struct X0 { }; 153 154struct X1 { 155 static int pfunc(float); 156}; 157void test_X0_X1() { 158 X0<X1::pfunc> x01; 159} 160 161// PR6249 162namespace pr6249 { 163 template<typename T, T (*func)()> T f() { 164 return func(); 165 } 166 167 int h(); 168 template int f<int, h>(); 169} 170 171namespace PR6723 { 172 template<unsigned char C> void f(int (&a)[C]); // expected-note {{candidate template ignored}} \ 173 // expected-note{{substitution failure [with C = '\x00']}} 174 void g() { 175 int arr512[512]; 176 f(arr512); // expected-error{{no matching function for call}} 177 f<512>(arr512); // expected-error{{no matching function for call}} 178 } 179} 180 181// Check that we instantiate declarations whose addresses are taken 182// for non-type template arguments. 183namespace EntityReferenced { 184 template<typename T, void (*)(T)> struct X { }; 185 186 template<typename T> 187 struct Y { 188 static void f(T x) { 189 x = 1; // expected-error{{assigning to 'int *' from incompatible type 'int'}} 190 } 191 }; 192 193 void g() { 194 typedef X<int*, Y<int*>::f> x; // expected-note{{in instantiation of}} 195 } 196} 197 198namespace PR6964 { 199 template <typename ,int, int = 9223372036854775807L > // expected-warning 2{{non-type template argument value '9223372036854775807' truncated to '-1' for template parameter of type 'int'}} \ 200 // expected-note 2{{template parameter is declared here}} 201 struct as_nview { }; 202 203 template <typename Sequence, int I0> 204 struct as_nview<Sequence, I0> // expected-note{{while checking a default template argument used here}} 205 { }; 206} 207 208// rdar://problem/8302138 209namespace test8 { 210 template <int* ip> struct A { 211 int* p; 212 A() : p(ip) {} 213 }; 214 215 void test0() { 216 extern int i00; 217 A<&i00> a00; 218 } 219 220 extern int i01; 221 void test1() { 222 A<&i01> a01; 223 } 224 225 226 struct C { 227 int x; 228 char y; 229 double z; 230 }; 231 232 template <C* cp> struct B { 233 C* p; 234 B() : p(cp) {} 235 }; 236 237 void test2() { 238 extern C c02; 239 B<&c02> b02; 240 } 241 242 extern C c03; 243 void test3() { 244 B<&c03> b03; 245 } 246} 247 248namespace PR8372 { 249 template <int I> void foo() { } // expected-note{{template parameter is declared here}} 250 void bar() { foo <0x80000000> (); } // expected-warning{{non-type template argument value '2147483648' truncated to '-2147483648' for template parameter of type 'int'}} 251} 252 253namespace PR9227 { 254 template <bool B> struct enable_if_bool { }; 255 template <> struct enable_if_bool<true> { typedef int type; }; 256 void test_bool() { enable_if_bool<false>::type i; } // expected-error{{enable_if_bool<false>}} 257 258 template <char C> struct enable_if_char { }; 259 template <> struct enable_if_char<'a'> { typedef int type; }; 260 void test_char_0() { enable_if_char<0>::type i; } // expected-error{{enable_if_char<'\x00'>}} 261 void test_char_b() { enable_if_char<'b'>::type i; } // expected-error{{enable_if_char<'b'>}} 262 void test_char_possibly_negative() { enable_if_char<'\x02'>::type i; } // expected-error{{enable_if_char<'\x02'>}} 263 void test_char_single_quote() { enable_if_char<'\''>::type i; } // expected-error{{enable_if_char<'\''>}} 264 void test_char_backslash() { enable_if_char<'\\'>::type i; } // expected-error{{enable_if_char<'\\'>}} 265} 266 267namespace PR10579 { 268 namespace fcppt 269 { 270 namespace container 271 { 272 namespace bitfield 273 { 274 275 template< 276 typename Enum, 277 Enum Size 278 > 279 class basic; 280 281 template< 282 typename Enum, 283 Enum Size 284 > 285 class basic 286 { 287 public: 288 basic() 289 { 290 } 291 }; 292 293 } 294 } 295 } 296 297 namespace 298 { 299 300 namespace testenum 301 { 302 enum type 303 { 304 foo, 305 bar, 306 size 307 }; 308 } 309 310 } 311 312 int main() 313 { 314 typedef fcppt::container::bitfield::basic< 315 testenum::type, 316 testenum::size 317 > bitfield_foo; 318 319 bitfield_foo obj; 320 } 321 322} 323 324template <int& I> struct PR10766 { static int *ip; }; 325template <int& I> int* PR10766<I>::ip = &I; 326