Re: Excessive use of 'this' and performance
Ivan Novick, http://www.0x4849.net wrote:
Alberto Ganesh Barbati wrote:
dasjotre ha scritto:
Alberto Ganesh Barbati wrote:
In fact, the first one might brand you either as a beginner or
as a Guru, according to the context. Not many beginners knows
the difference between dependent and non-dependent names ;-)
Could you please provide example where
using this produces different behaviour
http://www.parashift.com/c++-faq-lite/templates.html#faq-35.19
I have compiled the below code and all four versions print out "base
member function". I was expecting to see the unqualified function
call, use the global function not the member function as described
in this thread. What did i do wrong?
You used a non-conformant compiler?
How I can change this code to
reproduce the problem where, if you don't use this or otherwise
qualify the name, the global function is called? Thank you, Ivan
The code is correct as is.
Bo Persson
#include <iostream>
void print_me()
{
std::cout << "global function" << std::endl;
}
template <typename T>
struct wrapper
{
void print_me()
{
std::cout << "base member function" << std::endl;
}
};
template <typename T>
struct derived : public wrapper<T>
{
derived()
{
print_me();
this->print_me();
wrapper<T>::print_me();
derived<T>::print_me();
}
};
int main(int argc, char** argv)
{
derived<int> x;
return 0;
}
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