I was looking at the SO post C++ file stream open modes ambiguity. I wanted to know the default file opening mode of fstream. One of the answer says, What the above implies is that the following...

Compiler: TDM-GCC-5.1.0 (SJLJ unwinding) I was playing around with declval and I noticed that I was unable to use it in a context where it should work: as an argument to typeid(). In the followin...

In the documentation, I can see that std::vector<bool> is optimized for space-efficiency by making every boolean occupy one single bit. From the documentation: The manner in which std::vec...