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Outline of a Bison Grammar
==========================
A Bison grammar file has four main sections, shown here with the
appropriate delimiters:
%{
C DECLARATIONS
%}
BISON DECLARATIONS
%%
GRAMMAR RULES
%%
ADDITIONAL C CODE
Comments enclosed in `/* ... */' may appear in any of the sections.
* Menu:
* C Declarations Syntax and usage of the C declarations section.
* Bison Declarations Syntax and usage of the Bison declarations section.
* Grammar Rules Syntax and usage of the grammar rules section.
* C Code Syntax and usage of the additional C code section.