EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 2·5 min read
sizeof is surprisingly difficult to parse in c
TL;DR
Parsing the 'sizeof' operator in C is more complex than it seems due to its dual nature as both a unary expression and a parenthesized type name. This complexity arises particularly with the presence of compound literals, which complicate the parsing process.
✦ Why It Matters
Review your parsing logic for 'sizeof' to handle compound literals correctly in your C code.
Key Takeaways
- Understand the difference between unary expressions and type names in sizeof.
- Implement special cases for compound literals in your parser.
- Avoid combining parsing functions for unary expressions and casts.
- Test parsing strategies with various expressions to ensure accuracy.
How It Works
The parsing strategy for sizeof must differentiate between unary expressions and type names, especially when compound literals are involved. By checking for a '{' token after a type name, the parser can correctly identify and handle compound literals, ensuring accurate parsing.