C++ Move Semantics

#include <iostream>
#include <string>
#include <utility>
#include <vector>

int main() {
    std::vector<std::string> a{"alpha", "beta", "gamma"};
    std::vector<std::string> b = a;            // copy
    std::vector<std::string> c = std::move(a); // move: steals a's buffer
    std::cout << a.size() << ' ' << b.size() << ' ' << c.size() << '\n';

    std::string name = "a long string that would be expensive to copy";
    std::vector<std::string> names;
    names.push_back(std::move(name));
    std::cout << names[0].size() << " chars moved; source now " << (name.empty() ? "empty" : "not empty") << '\n';
}