3.1 Outline of a Bison Grammar

A Bison grammar file has four main sections, shown here with the appropriate delimiters:

%{
  Prologue
%}

Bison declarations

%%
Grammar rules
%%

Epilogue

Comments enclosed in ‘/* … */’ may appear in any of the sections. As a GNU extension, ‘//’ introduces a comment that continues until end of line.

• The prologue
• Prologue Alternatives
• The Bison Declarations Section
• The Grammar Rules Section
• The epilogue