Concatenate string_views

1#include <iostream>
2#include <string>
3#include <string_view>
4
5int main() {
6  std::string_view view1{"Hello, "};
7  std::string_view view2{"world!"};
8
9  // Create a new std::string that
10  // concatenates view1 and view2
11  std::string combined{view1};
12  combined += view2;  
13
14  std::cout << combined;
15}

1#include <iostream>
2#include <sstream>
3#include <string_view>
4
5int main() {
6  std::string_view view1{"Hello, "};
7  std::string_view view2{"world!"};
8
9  std::stringstream ss;
10  ss << view1 << view2;  
11
12  std::string combined = ss.str();
13  std::cout << combined;
14}

1#include <iostream>
2#include <string>
3#include <string_view>
4
5std::string concatenate(
6  std::string_view a, std::string_view b
7) {
8  return std::string{a} + std::string{b};  
9}
10
11int main() {
12  std::string_view view1{"Hello, "};
13  std::string_view view2{"world!"};
14
15  std::string combined =
16    concatenate(view1, view2);
17  std::cout << combined;
18}