1// RUN: %clang_cc1 -fsyntax-only -verify %s
2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5template<typename T>
6const T& min(const T&, const T&); // expected-note{{candidate template ignored: deduced conflicting types for parameter 'T' ('int' vs. 'long')}}
7
8void test_min() {
9  (void)min(1, 2l); // expected-error{{no matching function for call to 'min'}}
10}
11
12template<typename R, typename T>
13R *dyn_cast(const T&); // expected-note{{candidate template ignored: couldn't infer template argument 'R'}}
14
15void test_dyn_cast(int* ptr) {
16  (void)dyn_cast(ptr); // expected-error{{no matching function for call to 'dyn_cast'}}
17}
18
19template<int I, typename T>
20  void get(const T&); // expected-note{{candidate template ignored: invalid explicitly-specified argument for template parameter 'I'}}
21template<template<class T> class, typename T>
22  void get(const T&); // expected-note{{candidate template ignored: invalid explicitly-specified argument for 1st template parameter}}
23
24void test_get(void *ptr) {
25  get<int>(ptr); // expected-error{{no matching function for call to 'get'}}
26}
27
28template<typename T>
29  typename T::type get_type(const T&); // expected-note{{candidate template ignored: substitution failure [with T = int *]: type 'int *' cannot be used prior to '::'}}
30template<typename T>
31  void get_type(T *, int[(int)sizeof(T) - 9] = 0); // expected-note{{candidate template ignored: substitution failure [with T = int]: array size is negative}}
32
33void test_get_type(int *ptr) {
34  (void)get_type(ptr); // expected-error{{no matching function for call to 'get_type'}}
35}
36
37struct X {
38  template<typename T>
39  const T& min(const T&, const T&); // expected-note{{candidate template ignored: deduced conflicting types for parameter 'T' ('int' vs. 'long')}}
40};
41
42void test_X_min(X x) {
43  (void)x.min(1, 2l); // expected-error{{no matching member function for call to 'min'}}
44}
45
46namespace boost {
47  template<bool, typename = void> struct enable_if {};
48  template<typename T> struct enable_if<true, T> { typedef T type; };
49}
50template<typename T> typename boost::enable_if<sizeof(T) == 4, int>::type if_size_4(); // expected-note{{candidate template ignored: disabled by 'enable_if' [with T = char]}}
51int k = if_size_4<char>(); // expected-error{{no matching function}}
52
53namespace llvm {
54  template<typename Cond, typename T = void> struct enable_if : boost::enable_if<Cond::value, T> {};
55}
56template<typename T> struct is_int { enum { value = false }; };
57template<> struct is_int<int> { enum { value = true }; };
58template<typename T> typename llvm::enable_if<is_int<T> >::type if_int(); // expected-note{{candidate template ignored: disabled by 'enable_if' [with T = char]}}
59void test_if_int() {
60  if_int<char>(); // expected-error{{no matching function}}
61}
62
63template<typename T> struct NonTemplateFunction {
64  typename boost::enable_if<sizeof(T) == 4, int>::type f(); // expected-error{{no type named 'type' in 'boost::enable_if<false, int>'; 'enable_if' cannot be used to disable this declaration}}
65};
66NonTemplateFunction<char> NTFC; // expected-note{{here}}
67
68namespace NS1 {
69  template <class A>
70  class array {};
71}
72
73namespace NS2 {
74  template <class A>
75  class array {};
76}
77
78template <class A>
79void foo(NS2::array<A>); // expected-note{{candidate template ignored: could not match 'NS2::array' against 'NS1::array'}}
80
81void test() {
82  foo(NS1::array<int>()); // expected-error{{no matching function for call to 'foo'}}
83}
84
85namespace std {
86  template<bool, typename = void> struct enable_if {};
87  template<typename T> struct enable_if<true, T> { typedef T type; };
88
89  template<typename T, T V> struct integral_constant { static const T value = V; };
90  typedef integral_constant<bool, false> false_type;
91  typedef integral_constant<bool, true> true_type;
92};
93
94namespace PR15673 {
95  template<typename T>
96  struct a_trait : std::false_type {};
97
98  template<typename T,
99           typename Requires = typename std::enable_if<a_trait<T>::value>::type>
100#if __cplusplus <= 199711L
101  // expected-warning@-2 {{default template arguments for a function template are a C++11 extension}}
102#endif
103  // expected-note@-4 {{candidate template ignored: disabled by 'enable_if' [with T = int]}}
104  void foo() {}
105  void bar() { foo<int>(); } // expected-error {{no matching function for call to 'foo'}}
106
107
108  template<typename T>
109  struct some_trait : std::false_type {};
110
111  // FIXME: It would be nice to tunnel the 'disabled by enable_if' diagnostic through here.
112  template<typename T>
113  struct a_pony : std::enable_if<some_trait<T>::value> {};
114
115  template<typename T,
116           typename Requires = typename a_pony<T>::type>
117#if __cplusplus <= 199711L
118  // expected-warning@-2 {{default template arguments for a function template are a C++11 extension}}
119#endif
120  // FIXME: The source location here is poor.
121  void baz() { } // expected-note {{candidate template ignored: substitution failure [with T = int]: no type named 'type' in 'PR15673::a_pony<int>'}}
122  void quux() { baz<int>(); } // expected-error {{no matching function for call to 'baz'}}
123
124
125  // FIXME: This note doesn't make it clear which candidate we rejected.
126  template <typename T>
127  using unicorns = typename std::enable_if<some_trait<T>::value>::type;
128#if __cplusplus <= 199711L
129  // expected-warning@-2 {{alias declarations are a C++11 extension}}
130#endif
131  // expected-note@-4 {{candidate template ignored: disabled by 'enable_if' [with T = int]}}
132
133  template<typename T,
134           typename Requires = unicorns<T> >
135#if __cplusplus <= 199711L
136  // expected-warning@-2 {{default template arguments for a function template are a C++11 extension}}
137#endif
138  void wibble() {}
139  void wobble() { wibble<int>(); } // expected-error {{no matching function for call to 'wibble'}}
140}
141