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.\" This code is derived from software contributed to Berkeley by
.\" Robert Paul Corbett.
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.\"     @(#)yacc.1	5.8 (Berkeley) 5/24/93
.\"
.TH JAY 1 "May 24, 1993 / July 8, 1998"
.UC 6
.SH NAME
jay \- an LALR(1) parser generator for Java and C#
.SH SYNOPSIS
.B jay [ -tv ] [ -c ] [ -p ] [ -b
.I file_prefix
.B ] [ -V
.I yyValue
.B ]
.I filename
.B <
.I skeleton
.SH DESCRIPTION
.I Jay
reads the grammar specification in the file
.I filename
and generates an LR(1) parser for it.
The parsers consist of a set of LALR(1) parsing tables and a driver routine
from the file
.I skeleton
written in the Java programming language.
.I Jay
writes the parse tables and the driver routine to standard output.
.PP
The following options are available:
.RS
.TP
\fB-b \fIfile_prefix\fR
The
.B -b
option changes the prefix prepended to the output file names to
the string denoted by
.IR file_prefix.
The default prefix is the character
.IR y.
.TP
.B -c
The
.B -c 
option makes jay generate C# code instead of the default Java.
.TP
.B -t
The
.B -t
option arranges for
debugging information to be incorporated in the compiled code.
.TP
.B -v
The
.B -v
option causes a human-readable description of the generated parser to
be written to the file
.IR y.output.
.TP
.B -p
The
.B -p
option causes
.I jay
to print the directory in which its sample skeleton files are
installed.  If a project wants to use the default skeleton file
included with \fIjay\fR, it can use this option in a makefile to
find the path to the 
.I skeleton
or
.I skeleton.cs
file included with the jay distribution.
.RE
.PP
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.
.SH FILES
.IR skeleton
.br
.IR y.output
.br
.IR /tmp/yacc.aXXXXXX
.br
.IR /tmp/yacc.tXXXXXX
.br
.IR /tmp/yacc.uXXXXXX
.SH 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.
.SH HISTORY
.I Jay
is derived from Berkeley
.I yacc .
Input conventions closely follow those of
.I yacc ;
for details,
consult the parser
.I skeleton
file and the commented example included with the sources.