example enum error

[dentiny]

Summary

Briefly explain what this PR does.

Related Issues

Closes # or links to related issues.

Changes

Checklist

• Code builds correctly
• Tests have been added or updated
• Documentation updated if necessary
• I have reviewed my own changes

[gemini-code-assist]

Summary of Changes

Hello @dentiny, 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!

I've refactored the IcebergMessage variant within the Error enum to provide more detailed error information. This change specifically adds a location field alongside the existing error message, enhancing error reporting by including the source location where the error originated. This improves the debuggability and clarity of error messages related to Iceberg operations.

Highlights

• Error Enum Refactoring: The IcebergMessage variant in the Error enum has been changed from a simple string tuple (IcebergMessage(String)) to a struct-like variant (IcebergMessage { message: String, location: Location }). This allows for more structured error data.
• Error Instantiation Update: The code that creates IcebergMessage errors, specifically in table_handler.rs when failing to create an Iceberg snapshot, has been updated to use the new struct-like syntax, including the location!() macro for capturing the source location.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in issue comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments or fill out our survey to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request aims to add location information to the Error::IcebergMessage enum variant. However, the current implementation introduces compilation errors because the Location type is not defined and the location! macro is not in scope. I've provided suggestions to use std::panic::Location and std::panic::Location::caller() to resolve these issues. Please note that using std::panic::Location::caller() requires annotating the enclosing function with #[track_caller].

[gemini-code-assist]

The type Location is not defined or imported in this scope. This will cause a compilation error. You probably meant to use std::panic::Location. Note that std::panic::Location has a lifetime parameter, which should typically be 'static when using Location::caller().

Suggested change

	IcebergMessage { message: String, location: Location, },
	IcebergMessage { message: String, location: std::panic::Location<'static>, },

[gemini-code-assist]

The location! macro is not a standard Rust feature and is not defined in this scope, which will cause a compilation error. You likely intend to use std::panic::Location::caller() to get the caller's location. Note that using std::panic::Location::caller() requires the enclosing function (event_loop) to be annotated with #[track_caller].

Suggested change

	let err = Err(Error::IcebergMessage { message: format!("Failed to create iceberg snapshot: {e:?}"), location: location!(), ));
	let err = Err(Error::IcebergMessage { message: format!("Failed to create iceberg snapshot: {e:?}"), location: std::panic::Location::caller(), });