Move

std::move is used to indicate that an object t may be "moved from", i.e. allowing the efficient transfer of resources from one object to another.

Headers

1	`#include <utility>`

Copying a vector

1 2	`std::vector<double> v1(30, 1.0); std::vector<double> v2 = v1;`

Both vectors are valid

std::cout << "v1: ";
for (double x: v1) {
    std::cout << x << " ";
}
std::cout << '\n';

std::cout << "v2: ";
for (double x: v2) {
    std::cout << x << " ";
}
std::cout << '\n';

Copying a vector

1 2	`std::vector<double> v1(30, 1.0); std::vector<double> v2 = v1;`

The vector moved-from is invalidated

std::cout << "v1: ";
// NOLINTNEXTLINE(bugprone-use-after-move): making a point
for (double x: v1) {
    std::cout << x << " "; // prints nothing
}
std::cout << '\n';

std::cout << "v3: ";
for (double x: v3) {
    std::cout << x << " ";
}
std::cout << '\n';

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