[Bug c++/12311] New: Cannot resolve template methods properly

[davidcrowley at comcast dot net]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12311

           Summary: Cannot resolve template methods properly
           Product: gcc
           Version: 3.2.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: davidcrowley at comcast dot net
                CC: gcc-bugs at gcc dot gnu dot org

When compiling the following code I get this error:

bug.cpp: In function `Z* getAs(D&) [with Z = A]':
bug.cpp:38:   instantiated from here
bug.cpp:30: no matching function for call to `D::getAs()'


When compiling the templated getAs() function the compiler cant seem to resolve
the simple pass through call to the templated D::getAs() method.  If I call the
templated D::getAs() method directly then it works fine.

command line:  g++ bug.cpp
version: gcc 3.2.2
platform: RedHat 9.0 on i386

============ bug.cpp ==================

class A
{
};

class D : public A
{
public:
        void *getAs(int)
        {
                return this;
        }

        template <typename T>
        T* getAs()
        {
                return static_cast<T*>(getAs(0));
        }
};

template <typename Z>
Z* getAs(D& d)
{
        return d.getAs<Z>(); // no matching function
}

int
main()
{
        D d;
        A* a = d.getAs<A>(); // works
        A* aa = getAs<A>(d); // fails
        return 0;
}
============= end bug.cpp =================