Web Reference: Mar 25, 2026 · Error handling with the Result type. Result is the type used for returning and propagating errors. It is an enum with the variants, Ok(T), representing success and containing a value, and Err(E), representing error and containing an error value. Error propagation is a core part of Rust's error handling philosophy. Rather than using exceptions like many other languages, Rust uses the Result type and the ? operator to explicitly pass errors up the call stack. This approach makes error paths clear and ensures errors aren't accidentally ignored. May 19, 2023 · This would allow a middleware layer to handle all the error types that it can recover from, and propagate out a new set of "Middleware error" type (s) which encapsulate the lower level errors that it encountered but was not able to recover from.
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