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@CichyGlosZTyluGlowy: nullptr

In C and C++, it's always been important to express the idea of a NULL pointer--one that has no value. Oddly, in C++, the expression used, 0 (or NULL, always #defined to zero) was not even a pointer type. Although this worked most of the time, it could lead to strange and unexpected problems in what are, admittedly, rather edge cases. For example imagine you have the following two