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

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• Chris Krycho
  
  
  
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