BYACC(1) UNIX System V (July 15, 1990) BYACC(1)
NAME
Byacc - an LALR(1) parser generator
SYNOPSIS
byacc [ -dlrtv ] [ -b file_prefix ] [ -p symbol_prefix ]
filename
DESCRIPTION
Byacc 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. Byacc 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, byacc 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,
byacc 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
byacc-generated symbols to the string denoted by
symbol_prefix. The default prefix is the string
yy.
-r The -r option causes byacc 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 byacc 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.
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BYACC(1) UNIX System V (July 15, 1990) BYACC(1)
If the environment variable TMPDIR is set, the string
denoted by TMPDIR will be used as the name of the directory
where the temporary files are created.
FILES
y.code.c
y.tab.c
y.tab.h
y.output
/tmp/byacc.aXXXXXX
/tmp/byacc.tXXXXXX
/tmp/byacc.uXXXXXX
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.
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