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| // reference_wrapper::operator= #include <iostream> // std::cout #include <functional> // std::reference_wrapper int main () { int a,b; // reference_wrapper assignment: a=10; b=20; std::reference_wrapper<int> wrap1 (a); std::reference_wrapper<int> wrap2 (b); wrap1 = wrap2; ++wrap1; ++wrap2; std::cout << "a: " << a << '\n'; std::cout << "b: " << b << '\n'; std::cout << '\n'; // note the difference with: a=10; b=20; int& ref1 (a); int& ref2 (b); ref1 = ref2; ++ref1; ++ref2; std::cout << "a: " << a << '\n'; std::cout << "b: " << b << '\n'; return 0; }
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