[LLVMbugs] [Bug 13152] New: Nested classes member functions collide with inner class member functions

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13152

             Bug #: 13152
           Summary: Nested classes member functions collide with inner
                    class member functions
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: hallnicks at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Suppose you have a nested class like so:

// Begin clang.cpp
#include <cstdio>

template<class T>
class TemplatedClass
{
    public:
        class NestedBaseClass
        {
            public:
                NestedBaseClass() { }
                ~NestedBaseClass(){ }

            protected:
                void doImportantWork()
                {
                    fprintf(stderr, "%s\n", __PRETTY_FUNCTION__);
                }
        };

        class Subclass : public NestedBaseClass
        {
            public:
                Subclass( ) { }
                ~Subclass( ) { }

                void DoWork()
                {
                    doImportantWork();
                }
        };


        void doImportantWork(int i, double d);
};

template <class T>
void TemplatedClass<T>::doImportantWork(int i , double d) {
    fprintf(stderr, "i=%i, d=%lf\n", i, d);
}

int main( void )
{
    TemplatedClass<int>().doImportantWork(1, 1.0f);
    return 0;
}


// end clang.cpp

Compiling this with GCC does not produce an error and the expected method is
invoked.
$ g++ clang.cpp -o test && ./test
i=1, d=1.000000

Clang finds a problem with this. I agree that there is an issue with this
choice of naming but do not believe it should result in an error. It also
appears to be a bit of an edge case.

clang.cpp:28:6: error: call to non-static member function 'doImportantWork' of
'TemplatedClass' from nested type 'Subclass'
                                        doImportantWork();
                                        ^~~~~~~~~~~~~~~
1 error generated.

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