//// 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 allocationstd::string s = "from std::string";print(s); // implicit conversion, no copyprint("from a literal");}
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