anyhow versus thiserror in Rust error handling
WHAT IT TESTS: idiomatic error-design judgment. OUTLINE: anyhow gives one opaque dynamic error type for applications where you mostly propagate and report; thiserror derives concrete typed enums for libraries so callers can match on variants.
WHAT IT TESTS: whether you know the conventional split between application and library error handling. ANSWER OUTLINE: anyhow provides anyhow::Error, a single boxed dynamic error type with easy context attachment, ideal for application code and binaries where you just propagate, add context, and ultimately report, not match. thiserror is a derive macro that generates idiomatic Error implementations for your own enum, giving callers concrete, matchable variants, suited to libraries that must expose a stable, inspectable error API.
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- #rust
- #error-handling
- #anyhow
- #thiserror
- #libraries
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