invoke non-static function using ::

Discussion in 'C Programming' started by George2, Feb 23, 2008.

  1. George2

    George2

    Joined:
    Feb 12, 2008
    Messages:
    108
    Hello everyone,


    Confused why the following code can compile when we use :: to invoke non-static function. Especially, in the sample below, is it possible to call non-static member if T is not int? Why compiler allows the following code to compile?

    Code (Text):

    #include <iostream>

    using namespace std;

    template  <class T>
    struct FooTrait {
    public:
        int foo1();
    };

    template<>
    struct FooTrait<int> {

        static int foo1() {cout << "Hello Foo1" << endl; return 0;}
    };

    template <class T1, class T2 = FooTrait<T1>>
    struct Foo {
    public:
        int foo()
        {
            T2::foo1(); // possible to call non-static member if T is not int?

            return 0;
        }
    };

     int main()
     {
         Foo<int> f;
         f.foo();
         return 0;
     }
     

    thanks in advance,
    George
     
    George2, Feb 23, 2008
    #1
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