feat(hsx): enhance HSX parser error messages with contextual suggestions (#916) #2100
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- Add ErrorMessage module for improved error reporting - Implement fuzzy matching for common tag/attribute typos - Add comprehensive error suggestions and helpful context - Maintain backward compatibility with existing parser - Add test coverage for enhanced error scenarios Fixes common developer pain points when debugging HSX templates.
- Remove invalid Data.Text.Lines import - Fix NonEmpty pattern matching syntax - Correct error type references in Parser.hs - Clean up test imports and expectations - Ensure all modules compile successfully The enhanced error message system now compiles correctly. Some tests may need adjustment for exact message matching.
- Add new ErrorMessage module with intelligent error classification - Implement detailed error reporting with actionable suggestions - Support for invalid tags, attributes, and syntax errors - Provide HTML standard guidance and alternative solutions - Update parser to integrate enhanced error messages - Add comprehensive test coverage for error scenarios Fixes digitallyinduced#916
Demonstrates before/after error message improvements for issue digitallyinduced#916 - Invalid tag name errors with suggestions - Invalid attribute name errors with guidance - Duplicate attribute detection - Significantly improved developer experience
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Pull Request Overview
This PR implements enhanced error messages for the HSX parser to provide contextual suggestions and improve developer experience. The implementation addresses bounty issue #916 by adding a new error message module and integrating it into the existing parser.
- Added comprehensive error classification and suggestion system for HSX parsing errors
- Enhanced existing parser error points to provide contextual feedback and actionable suggestions
- Extended test coverage to verify enhanced error message functionality
Reviewed Changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.
Show a summary per file
| File | Description |
|---|---|
| IHP/HSX/ErrorMessage.hs | New module providing error classification, context extraction, and suggestion generation |
| IHP/HSX/Parser.hs | Enhanced existing parser with new parseHsxWithEnhancedErrors function and improved error messages at key failure points |
| ihp-hsx.cabal | Added new ErrorMessage module to library exports |
| Test/IHP/HSX/ParserSpec.hs | Updated tests to verify enhanced error messages and added comprehensive test cases |
| DEMO_DETAILED.md | Documentation showing before/after examples of error message improvements |
Comments suppressed due to low confidence (1)
ihp-hsx/Test/IHP/HSX/ParserSpec.hs:194
- The test assumes a specific suggestion format for 'spn' but the
suggestSimilarTagfunction returns "div, span, or check the HTML specification" for unknown tags. This test may be brittle if the suggestion algorithm changes.
errorMessage `shouldContain` "div, span"
- Replace undefined errorOffset with proper Megaparsec error handling - Improve attribute extraction from error messages with robust parsing - Add boundary check for pointer calculation to prevent negative replication - Enhance error position extraction from parse error bundles Addresses code review feedback for improved robustness and reliability.
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Summary
This PR implements a new module
IHP.HSX.ErrorMessageand enhances the HSX parser to provide contextual error messages. It addresses the bounty issue #916.Changes Made
IHP.HSX.ErrorMessageproviding smart error classification and suggestions.IHP.HSX.Parserto integrate contextual error messages.ihp-hsx.cabalto include the new module.ParserSpec.hswith tests covering new scenarios and verifying the improved messages.Features
ToHtmlinstances).uncheckedHsxfor custom tags) when appropriate.Tests & Validation
DEMO_DETAILED.md) with before/after examples and screenshots.Impact
fixes #916
/claim #916