clang/test/SemaCXX/libstdcxx_map_base_hack.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 // libstdc++ 4.2.x contains a bug where a friend struct template
   4 // declaration for std::tr1::__detail::_Map base has different
   5 // template arguments than the real declaration.
   6
   7 // We no longer contain the hack to workaround the problem.  Verify that
   8 // std::tr1::__detail::Map_base is not a unique and special snowflake.
   9
  10 namespace std { namespace tr1 { namespace __detail {
  11 template <typename _Key, typename _Value, typename _Ex, bool __unique,
  12           // expected-note@-1{{previous template declaration}}
  13           typename _Hashtable>
  14 struct _Map_base {};
  15 } } }
  16
  17 namespace std { namespace tr1 {
  18   template<typename T>
  19   struct X1 {
  20     template <typename _Key2, typename _Pair, typename _Hashtable>
  21     // expected-error@-1{{too few template parameters}}
  22     friend struct __detail::_Map_base;
  23   };
  24
  25 } }
  26
  27 std::tr1::X1<int> x1i; // expected-note{{in instantiation}}