Using member variables inherited from a templated base class (C++)
- by Aaron Becker
I'm trying to use member variables of a templated base class in a derived class, as in this example:
template <class dtype>
struct A {
int x;
};
template <class dtype>
struct B : public A<dtype> {
void test() {
int id1 = this->x; // always works
int id2 = A<dtype>::x; // always works
int id3 = B::x; // always works
int id4 = x; // fails in gcc & clang, works in icc and xlc
}
};
gcc and clang are both very picky about using this variable, and require either an explicit scope or the explicit use of "this". With some other compilers (xlc and icc), things work as I would expect. Is this a case of xlc and icc allowing code that's not standard, or a bug in gcc and clang?
