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