yyextract1

Usage

Overview

The yyextract utility extracts the grammar rules from a yacc grammar.

The options are as follows:

-b

Select the Backus-Naur Form (BNF) for the output.

-e

Select the Extended Backus-Naur Form (EBNF) for the output.

-h

Output in HTML format.

-o file

Set the output destination to file.

-t title

Specify the page title for the generated HTML page.

-w cols

Set the width limit of the output (this sets only the width of the %token header).

-y

Select the yacc format for the output. This is the default format.

-V

Print version information on standard output then exit.

Notes

The Extended Backus-Naur Form (EBNF) is like the Backus-Naur Form (BNF) but with the empty rules translated with the zero-or-one operator (within the brackets '[' and ']').