std::string_view causing dangling references when used with lambda in C++20
I've looked through the documentation and I'm still confused about I recently switched to I've searched everywhere and can't find a clear answer... I'm running into an scenario where I'm using `std::string_view` in a lambda function, but it seems to be referencing a string that goes out of scope, leading to a dangling reference. Here's a simplified version of the code: ```cpp #include <iostream> #include <string> #include <string_view> void processString(const std::string& str) { auto printSubstring = [&str]() { std::string_view sv(str.c_str(), 5); std::cout << sv << std::endl; }; printSubstring(); } int main() { std::string myString = "Hello, World!"; processString(myString); return 0; } ``` In this example, I expected `printSubstring` to output the first five characters of `myString`, but I started seeing undefined behavior after modifying `myString` later in the program. The output seems correct when I run the program, but I am concerned about the safety of using `std::string_view` this way. Is there a best practice for using `std::string_view` in lambda functions in C++20? I’ve tried changing the lambda to capture `str` by value, but I still get worried about potential dangling references. Any insights or suggestions would be appreciated! This is for a microservice running on Ubuntu 22.04. I'd be grateful for any help.