Re: c++/10773: template method in base class not resolved

Re: c++/10773: template method in base class not resolved

[bangerth]

Synopsis: template method in base class not resolved

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Tue May 13 21:48:12 2003
State-Changed-Why:
    That's how C++ works. Methods in the base class are hidden.
    Use "using" and consult a good book on C++.
    
    Sorry
      W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10773

c++/10773: template method in base class not resolved

[gtg833i]

>Number:         10773
>Category:       c++
>Synopsis:       template method in base class not resolved
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 13 21:16:02 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Enrique Robledo Arnuncio
>Release:        g++ (GCC) 3.2.3
>Organization:
>Environment:
debian GNU/Linux, unstable (sid) intel i386
>Description:
A template method in a base class can not be resolved on the
concrete class when the concrete class has a method with
the same name.

This may be related to the missing feature mentioned in the
bug reporting instructions, related to two-stages template
lookup, but I have no way to know.

The following code reproduces the problem:

--------------------------------------

class arg {};

struct A
{
        template<class T>
        int f(T a) { return 10;}
};


struct B : public A
{
        // Commenting out next lines "uncovers" the template method in the base
        // class, and the program compiles and works.
        int f(int a);
};

int main()
{
        B b;
        arg a;

// Last statement gives this error:
        // hidden_template_member.cc: In function `int main()':
    // hidden_template_member.cc:27: error: no matching function for call to `B::f(arg&)'
    // hidden_template_member.cc:14: note: candidates are: int B::f(int)

        return b.f(a);
}
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: