Override and overload in C++

Overloading generally means that you have two or more functions in the same scope having the same name. The function that better matches the arguments when a call is made wins and is called. Important to note, as opposed to calling a virtual function, is that the function that’s called is selected at compile time. … Read more

Most terse and reusable way of wrapping template or overloaded functions in function objects

You can create a macro like #define FUNCTORIZE(func) [](auto&&… val) \ noexcept(noexcept(func(std::forward<decltype(val)>(val)…))) -> decltype(auto) \ {return func(std::forward<decltype(val)>(val)…);} which will let you wrap any callable into a closure object. You would use it like auto constexpr predObj = FUNCTORIZE(pred);

overloading method priority in java

It is now clear that the method var(int…) is selected and not var(Integer…). The reason is that only certain conversions are allowed to be applied, and it can only be one of these conversions from the list, not a chain of conversions. The java compiler is not allowed to do a widening primitive conversion first, … Read more

C++ template functions overload resolution

The unspecialized function templates are also called the underlying base templates. Base templates can be specialized. The overloading rules to see which ones get called in different situations, are pretty simple, at least at a high level: Nontemplate functions are first-class citizens. A plain old nontemplate function that matches the parameter types as well as … Read more