How do I trim whitespace from a string in C++17?

How do I trim whitespace from a string in C++17?

In C++17, you can use the std::string class along with the std::find_if algorithm to trim whitespace. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

#include <iostream>
#include <string>
#include <algorithm>

std::string trim(const std::string& str) {
    auto start = str.begin();
    auto end = str.end();
    while (start != end && std::isspace(*start)) ++start;
    while (start != end && std::isspace(*(end - 1))) --end;
    return std::string(start, end);
}

int main() {
    std::string s = "   Hello, World!   ";
    std::cout << trim(s) << std::endl; // Outputs: "Hello, World!"
}

This function removes leading and trailing whitespace.

That looks great! Can I use this function with other types of whitespace?

Yes, you can modify the trim function to handle other types of whitespace by replacing std::isspace with a custom condition. Would you like help with that?