include example of public tuple struct and field

[nilslice]

I love the book, thank you for all the effort to create and maintain it! I just encountered a puzzling compiler error in a project of mine, and realized maybe other newcomers like myself could avoid some confusion if an example such as this was included.

Reference of the issue I faced: rust-lang/rust#39703

If you think there is a better place for this kind of example (e.g. not as part of the book), no worries at all. Otherwise, please feel free to change/improve the example as you see fit.

[steveklabnik]

Hey @nilslice ! I appreciate the PR. It's tough when you run into a bug, but I'm also not sure that this is a good addition to the book at this time; it's so big, we have to be really careful about additions, and I don't think this one pulls its weight. Maybe send a PR to Rust By Example instead?

Thank you again, and sorry I cannot accept this.

[nilslice]

@steveklabnik - no worries! the compiler error message was fixed recently, which will make this particular case far less confusing for future learners.

Thanks for the explanation and suggestion though! I will take a look at submitting a PR for Rust By Example.