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Summary of Changes

Hello @noamteyssier, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the error handling within the binseq crate by introducing a more flexible and standardized approach to managing generic errors. It allows for seamless conversion of standard library errors into the crate's custom Error enum, thereby improving the robustness and usability of error reporting throughout the library.

Highlights

  • Enhanced Error Handling: A new GenericError variant has been added to the Error enum, allowing for the conversion of any type implementing std::error::Error (aliased as StdError) into the crate's custom error type. This significantly broadens the types of errors that can be handled uniformly.
  • New Error Conversion Trait: A new trait, IntoBinseqError, has been introduced. This trait provides a standardized method (into_binseq_error) to convert various error types into the binseq::Error::GenericError, simplifying error propagation and integration.
  • Public API Exposure: The newly created IntoBinseqError trait is now publicly exported from the lib.rs module, making it available for users of the binseq crate to leverage its enhanced error conversion capabilities.
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Code Review

This pull request introduces a new GenericError variant and an IntoBinseqError trait to make it easier to convert arbitrary errors into the library's Error type. This is a positive change for the library's ergonomics. My review focuses on improving the documentation for these new additions to ensure clarity and maintainability, particularly regarding the distinction between the new GenericError and the existing AnyhowError.

#[error("Generic error: {0}")]
AnyhowError(#[from] anyhow::Error),

/// Generic errors for other unexpected situations

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medium

The documentation for GenericError is identical to AnyhowError, which could be confusing for users of your library. It's important to clarify the distinction between these two generic error types. For instance, you could explain that GenericError is intended as a general-purpose wrapper for any standard error, while AnyhowError is for specific integration with the anyhow crate's ecosystem.

Clarifying this will help developers understand when to use each variant. You might also consider whether both are necessary in the long term or if one should be preferred.

Suggested change
/// Generic errors for other unexpected situations
/// A generic wrapper for any type that implements `std::error::Error + Send + Sync`.

src/error.rs Outdated
UnsupportedExtension(String),
}

/// Trait for converting arbitrary errors into `BinseqError`

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medium

The documentation comment refers to BinseqError, but the actual type is named Error. For better clarity and to leverage rustdoc's linking capabilities, it's best to use the correct type name and link to it.

Suggested change
/// Trait for converting arbitrary errors into `BinseqError`
/// Trait for converting arbitrary errors into [`Error`]

@noamteyssier noamteyssier merged commit 35006bb into dev Dec 8, 2025
14 checks passed
@noamteyssier noamteyssier deleted the 65-built-in-error-transformations-for-generic-errors branch December 8, 2025 18:51
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2 participants