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 };
test_X0_X1()161 void test_X0_X1() {
162 X0<X1::pfunc> x01;
163 }
164
165 // PR6249
166 namespace pr6249 {
f()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 {{candidate template ignored}} \
177 // expected-note{{substitution failure [with C = '\x00']}}
g()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 }
184
185 // Check that we instantiate declarations whose addresses are taken
186 // for non-type template arguments.
187 namespace EntityReferenced {
188 template<typename T, void (*)(T)> struct X { };
189
190 template<typename T>
191 struct Y {
fEntityReferenced::Y192 static void f(T x) {
193 x = 1; // expected-error{{assigning to 'int *' from incompatible type 'int'}}
194 }
195 };
196
g()197 void g() {
198 typedef X<int*, Y<int*>::f> x; // expected-note{{in instantiation of}}
199 }
200 }
201
202 namespace PR6964 {
203 template <typename ,int, int = 9223372036854775807L > // expected-warning 2{{non-type template argument value '9223372036854775807' truncated to '-1' for template parameter of type 'int'}} \
204 // expected-note 2{{template parameter is declared here}}
205 struct as_nview { };
206
207 template <typename Sequence, int I0>
208 struct as_nview<Sequence, I0> // expected-note{{while checking a default template argument used here}}
209 { };
210 }
211
212 // rdar://problem/8302138
213 namespace test8 {
214 template <int* ip> struct A {
215 int* p;
Atest8::A216 A() : p(ip) {}
217 };
218
test0()219 void test0() {
220 extern int i00;
221 A<&i00> a00;
222 }
223
224 extern int i01;
test1()225 void test1() {
226 A<&i01> a01;
227 }
228
229
230 struct C {
231 int x;
232 char y;
233 double z;
234 };
235
236 template <C* cp> struct B {
237 C* p;
Btest8::B238 B() : p(cp) {}
239 };
240
test2()241 void test2() {
242 extern C c02;
243 B<&c02> b02;
244 }
245
246 extern C c03;
test3()247 void test3() {
248 B<&c03> b03;
249 }
250 }
251
252 namespace PR8372 {
foo()253 template <int I> void foo() { } // expected-note{{template parameter is declared here}}
bar()254 void bar() { foo <0x80000000> (); } // expected-warning{{non-type template argument value '2147483648' truncated to '-2147483648' for template parameter of type 'int'}}
255 }
256
257 namespace PR9227 {
258 template <bool B> struct enable_if_bool { };
259 template <> struct enable_if_bool<true> { typedef int type; }; // expected-note{{'enable_if_bool<true>::type' declared here}}
test_bool()260 void test_bool() { enable_if_bool<false>::type i; } // expected-error{{enable_if_bool<false>'; did you mean 'enable_if_bool<true>::type'?}}
261
262 template <char C> struct enable_if_char { };
263 template <> struct enable_if_char<'a'> { typedef int type; }; // expected-note 5{{'enable_if_char<'a'>::type' declared here}}
test_char_0()264 void test_char_0() { enable_if_char<0>::type i; } // expected-error{{enable_if_char<'\x00'>'; did you mean 'enable_if_char<'a'>::type'?}}
test_char_b()265 void test_char_b() { enable_if_char<'b'>::type i; } // expected-error{{enable_if_char<'b'>'; did you mean 'enable_if_char<'a'>::type'?}}
test_char_possibly_negative()266 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'?}}
test_char_single_quote()267 void test_char_single_quote() { enable_if_char<'\''>::type i; } // expected-error{{enable_if_char<'\''>'; did you mean 'enable_if_char<'a'>::type'?}}
test_char_backslash()268 void test_char_backslash() { enable_if_char<'\\'>::type i; } // expected-error{{enable_if_char<'\\'>'; did you mean 'enable_if_char<'a'>::type'?}}
269 }
270
271 namespace PR10579 {
272 namespace fcppt
273 {
274 namespace container
275 {
276 namespace bitfield
277 {
278
279 template<
280 typename Enum,
281 Enum Size
282 >
283 class basic;
284
285 template<
286 typename Enum,
287 Enum Size
288 >
289 class basic
290 {
291 public:
basic()292 basic()
293 {
294 }
295 };
296
297 }
298 }
299 }
300
301 namespace
302 {
303
304 namespace testenum
305 {
306 enum type
307 {
308 foo,
309 bar,
310 size
311 };
312 }
313
314 }
315
main()316 int main()
317 {
318 typedef fcppt::container::bitfield::basic<
319 testenum::type,
320 testenum::size
321 > bitfield_foo;
322
323 bitfield_foo obj;
324 }
325
326 }
327
328 template <int& I> struct PR10766 { static int *ip; };
329 template <int& I> int* PR10766<I>::ip = &I;
330
331 namespace rdar13000548 {
332 template<typename R, typename U, R F>
f()333 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 *'}}
334
335 int g(int);
336 int y[3];
test()337 void test()
338 {
339 f<int(int), int (*)(int), g>(); // expected-note{{in instantiation of}}
340 f<int[3], int*, y>(); // expected-note{{in instantiation of}}
341 }
342
343 }
344
345 namespace rdar13806270 {
346 template <unsigned N> class X { };
347 const unsigned value = 32;
348 struct Y {
349 X<value + 1> x;
350 };
foo()351 void foo() {}
352 }
353
354 namespace PR17696 {
355 struct a {
356 union {
357 int i;
358 };
359 };
360
361 template <int (a::*p)> struct b : a {
bPR17696::b362 b() { this->*p = 0; }
363 };
364
365 b<&a::i> c; // okay
366 }
367