CODEWITHSUNDEEP
c++c++11initializer-list
BlamKiwi
BlamKiwi

Reputation: 2193

Semantics of std::initializer_list

I'm implementing a collection of intrusive containers trying to be Standard Library like as possible. I'm considering whether I should support std::initializer_list but I don't quite grasp its semantics.

Basically if I had this code:

std::string a = "a";
std::string b = "b";
std::string c = "c";

std::initializer_list<std::string> list = { a, b, c };

// pass list to a container or whatever

Are the objects passed from the initializer list actual copies or "references" to the strings a, b and c?

Upvotes: 2

Views: 100

Answers (1)

Some programmer dude
Some programmer dude

Reputation: 409166

From this std::initializer_list reference:

An object of type std::initializer_list<T> is a lightweight proxy object that provides access to an array of objects of type const T.

What that means is that objects in the initializer list is stored by value. So to answer your question, yes copies will be made.

Upvotes: 4

Related Questions