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C++ Utility Library - move Function
Description
It returns an rvalue reference to arg.
Declaration
Following is the declaration for std::move function.
template <class T> typename remove_reference<T>::type&& move (T&& arg) noexcept;
C++11
template <class T> typename remove_reference<T>::type&& move (T&& arg) noexcept;
Parameters
arg − It is an object.
Return Value
It returns an rvalue reference that refers to arg.
Exceptions
Basic guarantee − This function never throws exceptions.
Data races
Calling this function introduces no data races.
Example
In below example explains about std::move function.
#include <utility> #include <iostream> #include <vector> #include <string> int main () { std::string foo = "It is a foo string"; std::string bar = "It is a bar string"; std::vector<std::string> myvector; myvector.push_back (foo); myvector.push_back (std::move(bar)); std::cout << "myvector contains:"; for (std::string& x:myvector) std::cout << ' ' << x; std::cout << '\n'; return 0; }
Let us compile and run the above program, this will produce the following result −
myvector contains: It is a foo string It is a bar string
utility.htm
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