Rust Enums and Pattern Matching: Type-Safe Alternatives
Source: doc.rust-lang.orgintermediate
Rust enums define a type that can be one of several variants, each holding its own data. They're used to model states like `Loading`/`Success`/`Error` or handle optional values with `Option<T>`.
Rust enums define a type that can be one of several distinct variants, each carrying its own data—like a type-safe union. They are core to modeling states (e.g., `Loading`, `Success(data)`) and handling optional values via the `Option<T>` enum (`Some(value)` or `None`). The main 'footgun' is a feature: the compiler forces you to handle every variant in a `match` expression, preventing runtime errors from unhandled cases.
Read the original → doc.rust-lang.org
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