clang/test/SemaTemplate/typename-specifier-2.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 template<typename MetaFun, typename T>
   4 struct bind_metafun {
   5   typedef typename MetaFun::template apply<T> type;
   6 };
   7
   8 struct add_pointer {
   9   template<typename T>
  10   struct apply {
  11     typedef T* type;
  12   };
  13 };
  14
  15 int i;
  16 // FIXME: if we make the declarator below a pointer (e.g., with *ip),
  17 // the error message isn't so good because we don't get the handy
  18 // 'aka' telling us that we're dealing with an int**. Should we fix
  19 // getDesugaredType to dig through pointers and such?
  20 bind_metafun<add_pointer, int>::type::type ip = &i;
  21 bind_metafun<add_pointer, float>::type::type fp = &i; // expected-error{{cannot initialize a variable of type 'bind_metafun<add_pointer, float>::type::type' (aka 'float *') with an rvalue of type 'int *'}}
  22
  23
  24 template<typename T>
  25 struct extract_type_type {
  26   typedef typename T::type::type t;
  27 };
  28
  29 double d;
  30 extract_type_type<bind_metafun<add_pointer, double> >::t dp = &d;