What operators do I have to overload to see all operations when passing an object to a function?
In C++11, you should add rvalue reference: A(A&&); void operator=(A&& a );
pass-by-pointer
What do “value semantics’” and “pointer semantics” mean in Go?
When you call a function or a method and you pass parameters to it, a copy is made from the values, and the function can only access these copies. This means if the function attempts to modify / change the copies, it will not change the original value. For example: func main() { i := … Read more
Performance cost of passing by value vs. by reference or by pointer?
It depends on what you mean by “cost”, and properties of the host system (hardware, operating system) with respect to operations. If your cost measure is memory usage, then the calculation of cost is obvious – add up the sizes of whatever is being copied. If your measure is execution speed (or “efficiency”) then the … Read more
Does C++ pass objects by value or reference?
Arguments are passed by value, unless the function signature specifies otherwise: in void foo(type arg), arg is passed by value regardless of whether type is a simple type, a pointer type or a class type, in void foo(type& arg), arg is passed by reference. In case of arrays, the value that is passed is a … Read more
Is Swift Pass By Value or Pass By Reference
Types of Things in Swift The rule is: Class instances are reference types (i.e. your reference to a class instance is effectively a pointer) Functions are reference types Everything else is a value type; “everything else” simply means instances of structs and instances of enums, because that’s all there is in Swift. Arrays and strings … Read more