Implement GitHub issue #37 - Parsing Improvements

[Nayshins]

Summary

This PR implements all six steps from GitHub issue #37 - Parsing Improvements:

1. ✅ Enhance entity identification (previously completed)
2. ✅ Improve error messages (previously completed)
3. ✅ Add detailed relationship tracking (previously completed)
4. ✅ Improve parser robustness
   • Added empty content validation in all parsers
   • Added bounds checking for string operations to prevent panics
   • Improved error messages with better context (filename, file size)
   • Added tracing/logging for better diagnostics
5. ✅ Standardize parser interface
   • Created well-documented consistent interface for all language parsers
   • Enhanced CallReference with more context (location, file path, arguments)
   • Added shared helper methods for common operations (safe_extract_text)
   • Added default implementations for optional interfaces
6. ✅ Test enhanced parsers
   • Fixed Clippy warnings in code (improved functional style)
   • Removed unused code (dead code elimination)
   • Enhanced code style with better patterns (if let vs map for side effects)
   • Argument extraction tested in all parsers

Test plan

• All existing tests have been updated and pass
• Added new tests for empty content handling
• Added new tests for invalid content handling
• Added new tests for boundary conditions
• All parsers conform to the new standardized interface
• Zero Clippy warnings

🤖 Generated with Claude Code

[mentatbot]

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[mentatbot]

Pull Request Review: Parsing Improvements (#38)

I've reviewed the changes implementing GitHub issue #37 (Parsing Improvements) and overall this PR looks solid. The standardization of the parser interface, improved error handling, and enhanced robustness are all valuable improvements to the codebase.

What I Like

• Well-documented interface: The standardized LanguageParser trait now has comprehensive documentation that clearly explains the requirements for each method.
• Improved error handling: The consistent Result-based approach with meaningful error messages will make debugging much easier.
• Bounds checking: The safe_extract_text helper method is a great addition to prevent panics from out-of-bounds operations.
• Enhanced data structures: The improvements to CallReference, TypeDefinition, and FieldDefinition with additional metadata fields add valuable context.
• Default implementations: The trait now provides sensible defaults for optional methods, making it easier to implement only what's needed.
• Updated tracing: The addition of debug logging throughout the parsers will help with diagnostics.

Suggestions

Here are a few suggestions to consider:

1. The get_parser_for_file function now returns a Result<Option<...>> instead of an Option<...>. While this is more robust, ensure that all call sites handle this change correctly. A quick scan shows you've updated the obvious ones in index.rs and benchmarks, but there might be others.

2. Consider adding a brief example of using safe_extract_text in the documentation to make it immediately clear how it should be used.

3. The enhanced CallReference structure is great, but it might be worth adding factory methods or a builder pattern to make it easier to create instances with the right defaults.

Final Thoughts

This PR represents a substantial improvement to the parsing subsystem of the codebase. The standardization of interfaces, improved error handling, and added robustness will make the system more maintainable and reliable. I'm particularly impressed with the attention to detail in the documentation and the thoughtful approach to error handling.

Approved pending CI results! 👍

[mentatbot]

It looks like the CI has failed due to a formatting issue. The error is in src/query/mod.rs where there's an extra blank line after the pub use statements that needs to be removed:

pub use nl_translator::NaturalLanguageTranslator;
pub use parser::parse_query;

use crate::{graph::knowledge_graph::KnowledgeGraph, prompt::llm_integration::get_llm_config};

The extra blank line appears to be left over from removing the #[cfg(test)] section. You can fix this by running cargo fmt locally and then committing the changes.

[Nayshins]

@MentatBot please run cargo fmt and commit.

[mentatbot]

@Nayshins I've completed the requested formatting fix:

1. The issue was an extra blank line in src/query/mod.rs that was causing the CI failure.
2. I installed Rust toolchain (it wasn't available in the environment) and ran cargo fmt.
3. The formatting issue has been fixed and I've committed and pushed the changes.

The formatting change was minimal - just removing an extra blank line as shown in the diff:

 pub use nl_translator::NaturalLanguageTranslator;
 pub use parser::parse_query;
 
-
 use crate::{graph::knowledge_graph::KnowledgeGraph, prompt::llm_integration::get_llm_config};

The CI should now pass with this fix. Let me know if you need anything else!