Constructing associative containers

Question

I was convinced (until I just tried it a moment ago) that it was possible to instantiate an associative container with array style notation.

For example,

std::set< int > _set = { 2, 3, 5 };

This isn't the case but I am wondering if there is any other way of bulk initialising a container in the constructor like this?

Answer 1

You can use Boost.Assign.

std::set< int > _set = boost::assign::list_of(2)(3)(5);

Answer 2

If you can use boost, then take a look here how to do it : http://beta.boost.org/doc/libs/1_43_0/libs/assign/doc/index.html

Answer 3

You could do:

const int x[] = { 2, 3, 5 };
std::set<int> _set(&x[0], &x[sizeof(x)/sizeof(x[0])]);

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