High level print function for C++ [duplicate]

Question

Is there a way to create a function or a macro in C++ that you can use like Python? What i mean is a function like:

print(i); // i is an integer.
print(i, s); // i is an integer, s is a std::string. They are separated by a white space.

A function that takes in a number of arguments, then just prints them out regardless of the types.

Answer 1

If you are allowed to use C++17, you can do it using fold-expression, like this:

#include <iostream>

template<class ...Args>
void print(const Args &...args) {
    auto seq_started = false;
    auto print_impl = [&](auto &value) mutable {
        if (seq_started) {
            std::cout << " " << value;
        } else {
            seq_started = true;
            std::cout << value;
        }
    };
    
    (print_impl(args), ...);
}

int main() {
    print("foo", 10, "bar", 20, "baz");
    return 0;
}

Answer 2

Use streams:

std::cout << i << ' ' << s << '\n';

For more complex formatting consider fmt, it supports the syntax for python's str.format as well as printf style formatting (but typesafe).