[LLVMbugs] [Bug 8322] New: Clang 2.8 Compile fails with: "address of overloaded function 'XXX' cannot be converted to type 'YYY' ", succeeds in GCC 4.4.1

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8322

           Summary: Clang 2.8 Compile fails with: "address of overloaded
                    function 'XXX' cannot be converted to type 'YYY' ",
                    succeeds in GCC 4.4.1
           Product: clang
           Version: 2.8
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: andy.somerville at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Created an attachment (id=5578)
 --> (http://llvm.org/bugs/attachment.cgi?id=5578)
attachment version of failure example to make downloading easier

A somewhat complex code fails with:

error: address of overloaded function 'XXX' cannot be converted to type 'YYY'


Full details:

c++ src/failure.cpp
src/failure.cpp:19:65: error: address of overloaded function
'defaultMessageCreateFunction' cannot be converted to type
'function<shared_ptr<FailureCase::MessageType> ()> const'
              const function<shared_ptr<M>(void)>& factory_fn =
defaultMessageCreateFunction<M>) {}
                                                                ^
src/failure.cpp:30:13: note: in instantiation of default function argument
expression for 'init<FailureCase::MessageType>' required here
            ops.template init<M>(bind(fp, obj, _1));
            ^
src/failure.cpp:43:13: note: in instantiation of function template
specialization 'Foo::subscribe<FailureCase::MessageType, FailureCase>'
requested here
            foo.subscribe( &FailureCase::callback, this);
            ^
src/failure.cpp:19:52: note: passing argument to parameter 'factory_fn' here
              const function<shared_ptr<M>(void)>& factory_fn =
defaultMessageCreateFunction<M>) {}
                                                   ^
1 error generated.



src/failure.cpp  (requires boost)
////////////////////////////////////////////////////////////////
#include <boost/shared_ptr.hpp>
#include <boost/function.hpp>
#include <boost/make_shared.hpp>
#include <boost/bind.hpp>

using namespace boost;

template<typename M>
inline shared_ptr<M> defaultMessageCreateFunction()
{
    return make_shared<M>();
}


struct SubscribeOptions
{
    template<class M>
    void init(const function<void (const shared_ptr<M const>&)>& _callback,
              const function<shared_ptr<M>(void)>& factory_fn =
defaultMessageCreateFunction<M>) {}
};


class Foo
{
    public:
        template<class M, class T>
        void subscribe( void(T::*fp)(const shared_ptr<M const>&), T* obj)
        {
            SubscribeOptions ops;
            ops.template init<M>(bind(fp, obj, _1));
        }
};


class FailureCase
{
        class MessageType {};
        typedef shared_ptr<MessageType const> MessageTypeConstPtr;

    public:
        FailureCase()
        {
            foo.subscribe( &FailureCase::callback, this);
        }
        void callback(const MessageTypeConstPtr& msg) {}
        Foo foo;
};


int main()
{
    FailureCase failureCase;
    return 0;
}

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