No More Nulls

Subject: Enumerated (enum) types, pattern matching, and meaningful return types.

Notes Today’s episode discusses, in order:

• Enumerated types, with an eye to the difference between structs and enums, and to the differences between enums in C and in Rust.
• Pattern matching, with a focus on using them with enumerated types and some discussion about how they differ from switch blocks in C-like languages.
• Using the Option and Result enumerated types with pattern matching to provide meaningful returns from functions safely.

Order There is a specific order to the examples below, and it is not the automatically-alphabetized order rendered by rustdoc. Instead, you should work through in the sequence they appear in the source:

1. RelatedishThings
2. demonstrate_basic_enumeration
3. demonstrate_match
4. get_an_option
5. demonstrate_option
6. get_a_result
7. demonstrate_result

Links * New Rustacean Pull Request #1 * Work on IDE support! + Landing page + My chosen tool: JetBrains/IntelliJ * Rustlings * Rust FFI Omnibus

Follow/Support * New Rustacean: + Twitter: @newrustacean + App.net: @newrustacean + Patreon + Email: hello at newrustacean dot com * Chris Krycho + Twitter: @chriskrycho + App.net: @chriskrycho