//

// 4.4.string.view.cpp

// chapter 04 containers

// modern c++ tutorial

//

// created by changkun at changkun.de

// https://github.com/changkun/modern-cpp-tutorial

//

#include <iostream>

#include <string>

#include <string_view>

// std::string_view is a non-owning, read-only view over a character

// sequence; passing it avoids copying and accepts both std::string and

// string literals.

void print(std::string_view sv) {

std::cout << sv << " (size = " << sv.size() << ")" << std::endl;

}

int main() {

std::string_view sv = "hello, world";

print(sv.substr(0, 5)); // "hello", no allocation

std::string s = "from std::string";

print(s); // implicit conversion, no copy

print("from a literal");

}