EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 5·5 min read
How to not write parsers
TL;DR
A new approach to writing parsers emphasizes using tree structures and constraints to ensure valid parsing without traditional grammar pitfalls. This method enhances the reliability of parsing by focusing on compatibility and error-free outputs.
✦ Why It Matters
Implement tree structures and constraints in your parser development to improve accuracy and reliability.
Key Takeaways
- Utilize tree structures for more reliable parsing.
- Define constraints to ensure grammar compatibility.
- Implement a golden testsuite for validation.
- Use a coding agent to streamline grammar edits.
How It Works
The approach uses tree structures to represent code, allowing for the definition of constraints that ensure the generated parser aligns with expected patterns. By checking compatibility between grammar and queries, the method prevents invalid node types and ensures that parse trees are free of errors.
The golden testsuite captures essential elements, enforcing their presence and correctness, while the coding agent aids in identifying regressions during grammar modifications.