GNU Info

(bison.info)Context Dependency

---

Next: Debugging Prev: Error Recovery Up: Top

---

Enter node , (file) or (file)node

Handling Context Dependencies
*****************************

   The Bison paradigm is to parse tokens first, then group them into
larger syntactic units.  In many languages, the meaning of a token is
affected by its context.  Although this violates the Bison paradigm,
certain techniques (known as "kludges") may enable you to write Bison
parsers for such languages.

Semantic Tokens

Token parsing can depend on the semantic context.

Lexical Tie-ins

Token parsing can depend on the syntactic context.

Tie-in Recovery

Lexical tie-ins have implications for how

error recovery rules must be written.

   (Actually, "kludge" means any technique that gets its job done but is
neither clean nor robust.)