CODEWITHSUNDEEP
c++hashtable
Jishnu U Nair
Jishnu U Nair

Reputation: 520

Hash table as return type of a function in C++

I would like to know if I can use Hash table as a return type of a function in C++. :)

Upvotes: 0

Views: 497

Answers (1)

Joseph Mansfield
Joseph Mansfield

Reputation: 110768

The C++ standard library implementation of a hash table is std::unordered_map and yes, you can happily return it from a function:

std::unordered_map<X, Y> foo() {
  std::unordered_map<X, Y> map;
  return map;
}

It can be copied because it has a copy constructor†. If you implement your own hash table, it will also be returnable if it has a copy constructor.

† In C++11, a move constructor will be sufficient for the example given.

Upvotes: 5

Related Questions