Improving our example 2 – references

Let’s set everything up for our next version of this example:

• Create a new folder called b-coroutines-references and copy everything from a-coroutines-variables over to it
• You can change the name of the project so that it corresponds with the folder by changing the name attribute in the package section in Cargo.toml, but it’s not something you need to do for the example to work

Note

You can find this example in this book’s GitHub repository in the ch10/b-coroutines-references folder.

This time, we’ll learn how to store references to variables in our coroutines by using the following coroutine/wait example program:

use std::fmt::Write;
coroutine fn async_main() {
    let mut buffer = String::from("\nBUFFER:\n----\n");
    let writer = &mut buffer;
    println!("Program starting");
    ...