sample-code/src/mv_semantics_exercise2.cpp at dev · robosherpa/sample-code

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Memory Management exercises part 2: Use move semantics implicitly as part of the STL

#include <iostream>

#include <vector>

#include <cmath>

using namespace std;

const int array_size = 1e6;

vector<int> RandomNumbers3()

{

vector<int> random_numbers;

random_numbers.resize(array_size);

for (int i = 0; i < array_size; i++)

{

random_numbers[i] = rand();

}

return random_numbers; // return-by-value of the STL vector

}

int main()

{

/* EXERCISE 2-1: Return large objects using move semantics in the STL */

// store the data in a suitable variable named 'random_numbers_3'

// SOLUTION to exercise 2-1

vector<int> random_numbers_3 = RandomNumbers3(); // will not copy the vector but use move semantics "under the hood"

// Note that all of the STL classes (including vector) have been extended to support move semantics

}