[llvm-bugs] [Bug 32898] New: Overloaded method pointer's public/private access isn't resolved correctly

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=32898

            Bug ID: 32898
           Summary: Overloaded method pointer's public/private access
                    isn't resolved correctly
           Product: clang
           Version: 4.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: russ.schaaf at superevilmegacorp.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

The following code fails to compile on clang 4.0.0 - it compiles with earlier
versions of clang, as well as several other compilers I've tried:



template<typename T, void(T::*pMethod)()>
void methodThunk() {}

// If this isn't a template function, the code compiles
template<typename Type> 
void registerCallback(void(*fn)()) {}

class C
{
public:
    // Commenting this overload out makes the code compile 
    void onUpdate(int i) {} // Unrelated overload, with no implementation

private:
    void onUpdate() {} // This is the one I want to use for a template arg

    void doSomething()
    {
        // ERROR IS HERE   -------------------v
        registerCallback<int>(&methodThunk<C, &C::onUpdate>);
    }
};



Error is:

<source>:20:51: error: 'onUpdate' is a private member of 'C'
        registerCallback<int>(&methodThunk<C, &C::onUpdate>);
                                               ~~~^~~~~~~~
<source>:20:32: note: while substituting explicitly-specified template
arguments into function template 'methodThunk' 
        registerCallback<int>(&methodThunk<C, &C::onUpdate>);
                               ^
<source>:20:9: note: while substituting deduced template arguments into
function template 'registerCallback' [with Type = int]
        registerCallback<int>(&methodThunk<C, &C::onUpdate>);
        ^
1 error generated.
Compiler exited with result code 1

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