template this pointer

Using this-> For class templates with base classes, using a name x by itself is not always equivalent to this->x, even though a member x is inherited. For example: template <typename T> class Base { public: void exit(); }; template <typename T> class Derived : Base<T> { public: void foo() { exit(); // calls external exit() or error } }; In this example, for resolving the symbol exit inside foo(), exit() defined in Base is never considered. Therefore, either you have an error, or another exit() (such as the standard exit()) is called. For the moment, as a rule of thumb, we recommend that you always qualify any symbol that is declared in a base that is somehow dependent on a template parameter with this-> or Base<T>::. If you want to avoid all uncertainty, you may consider qualifying all member accesses (in templates).

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See Also:
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• Complete Tutorial of C++ Template's
• Standard Template Library Tutorial
• Inter Process Communication Tutorial
• Advance Programming in C & C++

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