C++ parameter passing rules
From: https://www.modernescpp.com/index.php/c-core-guidelines-how-to-pass-function-parameters
Parameter passing expression rules:
- F.15: Prefer simple and conventional ways of passing information
- F.16: For “in” parameters, pass cheaply-copied types by value and others by reference to const
- F.17: For “in-out” parameters, pass by reference to non-const
- F.18: For “consume” parameters, pass by X&& and std::move the parameter
- F.19: For “forward” parameters, pass by TP&& and only std::forward the parameter
- F.20: For “out” output values, prefer return values to output parameters
- F.21: To return multiple “out” values, prefer returning a tuple or struct
- F.60: Prefer T* over T& when “no argument” is a valid option