[RESOLVED] can operator() be a member function template

[ar115]

Hello all,

I want to overload operator() of a class with a template function like below
//---------------------------
class A {
public:

template< int type >
void
operator()() {
int i;
}
};

int main() {
A an_a;
an_a()<100>;
}
//--------------------

but i get the following errors (gcc 4.3.3):
file.cpp: In function ‘int main()’:
file.cpp:14: error: no match for call to ‘(A) ()’
file.cpp:14: error: expected primary-expression before ‘;’ token

what is the problem?

[GNiewerth]

You have to use the full operator name to invoke the method. It fails because the < operator has a higher precendence than the template argument bracket and the compiler tries to evaluate (anA < 100) > (), which is no valid syntax.

// works:
anA.operator()<100>();

// fails:
anA<100>();

[Peter_APIIT]

Nice to learn that.