C++
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Date and time using
header - decltype
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C++ Pimpl Idiom
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Remarks
The pimpl idiom (pointer to implementation, sometimes referred to as opaque pointer or cheshire cat technique), reduces the compilation times of a class by moving all its private data members into a struct defined in the .cpp file.
The class owns a pointer to the implementation. This way, it can be forward declared, so that the header file does not need to #include classes that are used in private member variables.
When using the pimpl idiom, changing a private data member does not require recompiling classes that depend on it.
