C++ Hash function for string in unordered_map

Question

It seems as if C++ does not have a hash function for strings in the standard library. Is this true?

What is a working example of using a string as a key in an unordered_

Answer 1

In my case it was really distraction.

I had a type X for which I implemented hashing for const& X an utilized it somewhere with

std::unordered_map m_map;

Then I wanted to have another map which key are of the type X and did:

std::unordered_map map_x;

Notice the LACK of const on the second case.