Question

The following code doesn’t compile with gcc, but does with Visual Studio:

template <typename T> class A { public:     T foo; };  template <typename T> class B: public A <T> { public:     void bar() { cout << foo << endl; } }; 

I get the error:

test.cpp: In member function ‘void B::bar()’:

test.cpp:11: error: ‘foo’ was not declared in this scope

But it should be! If I change bar to

void bar() { cout << this->foo << endl; } 

then it does compile, but I don’t think I have to do this. Is there something in the official specs of C++ that GCC is following here, or is it just a quirk?

Answer 1

This changed in gcc-3.4. The C++ parser got much more strict in that release — per the spec but still kinda annoying for people with legacy or multi-platform code bases.