[Bug c++/21808] Uninformative diagnostic for name lookup for template functions

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-29 16:02 -------
If you called a different function name instead of a template one, I get the following error:
t.cc: In function ?void foo(const A<T>&)?:
t.cc:7: error: there are no arguments to ?foo1? that depend on a template parameter, so a declaration of 
?foo1? must be available
t.cc:7: error: (if you use ?-fpermissive?, G++ will accept your code, but allowing the use of an 
undeclared name is deprecated)

  template <class T> struct A { T t; };
  // Swap following 2 functions to get conforming C++
  template <int i> struct B {static const int t = i;};
  template<class T> void foo(const A<T>& data)
  {
    foo1((int)data.t);
  }
  void foo1(int data);


In fact this has nothing to do with dependent or not, see the following code (which gives the same error 
message in 3.3.3 also):
  template <class T> struct A { T t; };
  // Swap following 2 functions to get conforming C++
  template <int i> struct B {static const int t = i;};
  template<class T> void foo1(const A<T>& data);
 void foo(const A<int>& data)
  {
    foo1((int)data.t);
  }
  void foo1(int data);


So the error message problem, in fact that is PR 17166 which I am going to mark this as a dup of.

*** This bug has been marked as a duplicate of 17166 ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
             Status|UNCONFIRMED                 |RESOLVED
           Keywords|                            |diagnostic
         Resolution|                            |DUPLICATE
            Summary|Uninformative diagnostic for|Uninformative diagnostic for
                   |name lookup from template   |name lookup for template
                   |function                    |functions


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21808