clang/test/SemaTemplate/nested-name-spec-template.cpp

   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
   5 namespace N {
   6   namespace M {
   7     template<typename T> struct Promote;
   8
   9     template<> struct Promote<short> {
  10       typedef int type;
  11     };
  12
  13     template<> struct Promote<int> {
  14       typedef int type;
  15     };
  16
  17     template<> struct Promote<float> {
  18       typedef double type;
  19     };
  20
  21     Promote<short>::type *ret_intptr(int* ip) { return ip; }
  22     Promote<int>::type *ret_intptr2(int* ip) { return ip; }
  23   }
  24
  25   M::Promote<int>::type *ret_intptr3(int* ip) { return ip; }
  26   M::template Promote<int>::type *ret_intptr4(int* ip) { return ip; }
  27 #if __cplusplus <= 199711L
  28   // expected-warning@-2 {{'template' keyword outside of a template}}
  29 #endif
  30
  31   M::template Promote<int> pi;
  32 #if __cplusplus <= 199711L
  33   // expected-warning@-2 {{'template' keyword outside of a template}}
  34 #endif
  35 }
  36
  37 N::M::Promote<int>::type *ret_intptr5(int* ip) { return ip; }
  38 ::N::M::Promote<int>::type *ret_intptr6(int* ip) { return ip; }
  39
  40
  41 N::M::template; // expected-error{{expected unqualified-id}}
  42 N::M::template Promote; // expected-error{{expected unqualified-id}}
  43
  44 namespace N {
  45   template<typename T> struct A;
  46
  47   template<>
  48   struct A<int> {
  49     struct X;
  50   };
  51
  52   struct B; // expected-note{{declared as a non-template here}}
  53 }
  54
  55 struct ::N::A<int>::X {
  56   int foo;
  57 };
  58
  59 template<typename T>
  60 struct TestA {
  61   typedef typename N::template B<T>::type type; // expected-error{{'B' following the 'template' keyword does not refer to a template}} \
  62                                                 // expected-error{{expected member name}}
  63 };
  64
  65 // Reduced from a Boost failure.
  66 namespace test1 {
  67   template <class T> struct pair {
  68     T x;
  69     T y;
  70
  71     static T pair<T>::* const mem_array[2];
  72   };
  73
  74   template <class T>
  75   T pair<T>::* const pair<T>::mem_array[2] = { &pair<T>::x, &pair<T>::y };
  76 }
  77
  78 typedef int T;
  79 namespace N1 {
  80   template<typename T> T f0();
  81 }
  82
  83 template<typename T> T N1::f0() { }
  84
  85 namespace PR7385 {
  86   template< typename > struct has_xxx0
  87   {
  88     template< typename > struct has_xxx0_introspect
  89     {
  90       template< typename > struct has_xxx0_substitute ;
  91       template< typename V >
  92       int int00( has_xxx0_substitute < typename V::template xxx< > > = 0 );
  93     };
  94     static const int value = has_xxx0_introspect<int>::value; // expected-error{{no member named 'value'}}
  95     typedef int type;
  96   };
  97
  98   has_xxx0<int>::type t; // expected-note{{instantiation of}}
  99 }
 100
 101 namespace PR7725 {
 102   template<class ignored> struct TypedefProvider;
 103   template<typename T>
 104   struct TemplateClass : public TypedefProvider<T>
 105   {
 106     void PrintSelf() {
 107       TemplateClass::Test::PrintSelf();
 108     }
 109   };
 110 }
 111
 112 namespace PR9226 {
 113   template<typename a>
 114   void nt() // expected-note{{function template 'nt' declared here}}
 115   { nt<>:: } // expected-error{{qualified name refers into a specialization of function template 'nt'}} \
 116   // expected-error{{expected unqualified-id}}
 117
 118   template<typename T>
 119   void f(T*); // expected-note{{function template 'f' declared here}}
 120
 121   template<typename T>
 122   void f(T*, T*); // expected-note{{function template 'f' declared here}}
 123
 124   void g() {
 125     f<int>:: // expected-error{{qualified name refers into a specialization of function template 'f'}}
 126   } // expected-error{{expected unqualified-id}}
 127
 128   struct X {
 129     template<typename T> void f(); // expected-note{{function template 'f' declared here}}
 130   };
 131
 132   template<typename T, typename U>
 133   struct Y {
 134     typedef typename T::template f<U> type; // expected-error{{template name refers to non-type template 'X::template f'}}
 135   };
 136
 137   Y<X, int> yxi; // expected-note{{in instantiation of template class 'PR9226::Y<PR9226::X, int>' requested here}}
 138 }
 139
 140 namespace PR9449 {
 141   template <typename T>
 142   struct s; // expected-note{{template is declared here}}
 143
 144   template <typename T>
 145   void f() {
 146     int s<T>::template n<T>::* f; // expected-error{{implicit instantiation of undefined template 'PR9449::s<int>'}} \
 147     // expected-error{{no member named 'n'}}
 148   }
 149
 150   template void f<int>(); // expected-note{{in instantiation of}}
 151 }