YACC(1) YACC(1)
July 15, 1990
NAME
Yacc - an LALR(1) parser generator
SYNOPSIS
yacc [ -dlrtv ] [ -b file_prefix ] [ -p symbol_prefix ] filename
DESCRIPTION
Yacc reads the grammar specification in the file filename and
generates an LR(1) parser for it. The parsers consist of a set of
LALR(1) parsing tables and a driver routine written in the C
programming language. Yacc normally writes the parse tables and the
driver routine to the file y.tab.c.
The following options are available:
-b file_prefix
The -b option changes the prefix prepended to the output
file names to the string denoted by file_prefix. The
default prefix is the character y.
-d The -d option causes the header file y.tab.h to be written.
-l If the -l option is not specified, yacc will insert #line
directives in the generated code. The #line directives let
the C compiler relate errors in the generated code to the
user's original code. If the -l option is specified, yacc
will not insert the #line directives. #line directives
specified by the user will be retained.
-p symbol_prefix
The -p option changes the prefix prepended to yacc-generated
symbols to the string denoted by symbol_prefix. The default
prefix is the string yy.
-r The -r option causes yacc to produce separate files for code
and tables. The code file is named y.code.c, and the tables
file is named y.tab.c.
-t The -t option changes the preprocessor directives generated
by yacc so that debugging statements will be incorporated in
the compiled code.
-v The -v option causes a human-readable description of the
generated parser to be written to the file y.output.
DIAGNOSTICS
If there are rules that are never reduced, the number of such rules is
reported on standard error. If there are any LALR(1) conflicts, the
number of conflicts is reported on standard error.
- 1 - Formatted: November 6, 2008
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