CODEWITHSUNDEEP
c++
mangenouilles
mangenouilles

Reputation: 41

class constructor with const reference

in this class

class Foo {
public:
  Foo(){}
  Foo(Foo const &) {}
};

when would Foo(Foo const &) ever be called? I do not understand this kind of constructor

Upvotes: 1

Views: 691

Answers (1)

Eliran Abdoo
Eliran Abdoo

Reputation: 611

This is called copy constructor. When you want to initialize a class instance by copying an existing instance, you'd probably want to use it.

const - you don't want to change the object you are copying.

reference - you don't want to copy the existing instance into the constructor, just to copy it again in the initialization.

Upvotes: 2

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