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Bison Grammar Files

Bison takes as input a context-free grammar specification and produces a C-language function that recognizes correct instances of the grammar.

The Bison grammar input file conventionally has a name ending in .y. See Invoking Bison.

• Grammar Outline: Overall layout of the grammar file.
• Symbols: Terminal and nonterminal symbols.
• Rules: How to write grammar rules.
• Recursion: Writing recursive rules.
• Semantics: Semantic values and actions.
• Locations: Locations and actions.
• Declarations: All kinds of Bison declarations are described here.
• Multiple Parsers: Putting more than one Bison parser in one program.