Question

I’m trying to use a delegate library in gcc http://www.codeproject.com/KB/cpp/ImpossiblyFastCppDelegate.aspx but the “preferred syntax” is not recognized by gcc 4.3. I.e. howto make compiler understand the
template < RET_TYPE (ARG1, ARG2) > syntax instead of template ??

TIA
/Rob

Answer 1

If a class has a template function as:

class A {
public:
    template<typename T>
    static void doThis() {...}
};

template<typename T>
class B {
public:
    static void doThat() {
       A::doThis<T>();
    }
};

then VC++ recognizes the syntax in class B, but for GCC you have to insert keyword template:

template<typename T>
class B {
public:
    static void doThat() {
       A::template doThis<T>();  // <-- "template" inserted
    }
};

and then it works in both GCC and VC++ (I wrote this off the top of my head, so I’m fairly sure its correct 😉