Template and member function pointers compile question

[Tristan Bonsall <tristan_bonsall@xxxxxxxxxxxx>]

Hello,

I have a compile error trying to build come code with GCC. It works with 
MSVC 7, so I was hoping it was valid C++. What do I need to change to 
make this compile under GCC?

We are trying to use a pointer to a member function of a template class 
to speed up part of our code, where we are selecting one of a number of 
similar functions, so a template function makes the code easier to maintain.

This inane example reproduces the problem while retaining the structure 
of the original code.

//------------------------------------------------------------------------------

template<class T>
class TestClass
{
public:
               TestClass() {}

   void        setFunc(bool, bool, bool);

private:

   template<bool,bool,bool> void calculate();

protected:

   void        (TestClass::*pFunc)();

   float       data;
};

//------------------------------------------------------------------------------

template<class T>
template<bool PLUS, bool MODULO, bool SQUARE>
void TestClass<T>::calculate()
{
   if (PLUS)
   {
       data += 10;

       if (MODULO)
       {
           data %= 5;
       }
   }
   else
   {
       data -= 7;
   }

   if (SQUARE)
   {
       data *= data;
   }
}

//------------------------------------------------------------------------------

template<class T>
void TestClass<T>::setFunc(bool plus, bool modulo, bool square)
{
   if (plus)
   {
       if (modulo)
       {
           if (square)
           {
               pFunc = &TestClass<T>::calculate<true,true,true>;
           }
           else
           {
               pFunc = &TestClass<T>::calculate<true,true,false>;
           }
       }
       else
       {
           if (square)
           {
               pFunc = &TestClass<T>::calculate<true,false,true>;
           }
           else
           {
               pFunc = &TestClass<T>::calculate<true,false,false>;
           }
       }
   }
   else
   {
       if (modulo)
       {
           if (square)
           {
               pFunc = &TestClass<T>::calculate<false,true,true>;
           }
           else
           {
               pFunc = &TestClass<T>::calculate<false,true,false>;
           }
       }
       else
       {
           if (square)
           {
               pFunc = &TestClass<T>::calculate<false,false,true>;
           }
           else
           {
               pFunc = &TestClass<T>::calculate<false,false,false>;
           }
       }
   }
}

//------------------------------------------------------------------------------

int main()
{
   TestClass<int> testClass;

   testClass.setFunc(true, true, false);
}

//------------------------------------------------------------------------------

This gives the following error message when compiled.

testclass.cpp: In member function 'void TestClass<T>::setFunc(bool, 
bool, bool)':
testclass.cpp:57: error: expected primary-expression before ';' token
testclass.cpp:61: error: expected primary-expression before ';' token
testclass.cpp:68: error: expected primary-expression before ';' token
testclass.cpp:72: error: expected primary-expression before ';' token
testclass.cpp:82: error: expected primary-expression before ';' token
testclass.cpp:86: error: expected primary-expression before ';' token
testclass.cpp:93: error: expected primary-expression before ';' token
testclass.cpp:97: error: expected primary-expression before ';' token
testclass.cpp: In member function 'void TestClass<T>::setFunc(bool, 
bool, bool) [with T = int]':
testclass.cpp:109:   instantiated from here
testclass.cpp:57: error: address of overloaded function with no 
contextual type information
testclass.cpp:61: error: address of overloaded function with no 
contextual type information
testclass.cpp:68: error: address of overloaded function with no 
contextual type information
testclass.cpp:72: error: address of overloaded function with no 
contextual type information
testclass.cpp:82: error: address of overloaded function with no 
contextual type information
testclass.cpp:86: error: address of overloaded function with no 
contextual type information
testclass.cpp:93: error: address of overloaded function with no 
contextual type information
testclass.cpp:97: error: address of overloaded function with no 
contextual type information

GCC version is powerpc-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple 
Computer, Inc. build 5247)