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146 lines
4.2 KiB
Groff
146 lines
4.2 KiB
Groff
.\" Copyright (c) 1989, 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Robert Paul Corbett.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)yacc.1 5.8 (Berkeley) 5/24/93
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.\"
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.TH YACC 1 "May 24, 1993"
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.UC 6
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.SH NAME
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yacc \- an LALR(1) parser generator
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.SH SYNOPSIS
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.B yacc [ -dlrtv ] [ -b
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.I file_prefix
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.B ] [ -p
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.I symbol_prefix
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.B ]
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.I filename
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.SH DESCRIPTION
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.I Yacc
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reads the grammar specification in the file
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.I filename
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and generates an LR(1) parser for it.
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The parsers consist of a set of LALR(1) parsing tables and a driver routine
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written in the C programming language.
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.I Yacc
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normally writes the parse tables and the driver routine to the file
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.IR y.tab.c.
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.PP
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The following options are available:
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.RS
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.TP
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\fB-b \fIfile_prefix\fR
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The
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.B -b
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option changes the prefix prepended to the output file names to
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the string denoted by
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.IR file_prefix.
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The default prefix is the character
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.IR y.
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.TP
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.B -d
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The \fB-d\fR option causes the header file
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.IR y.tab.h
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to be written.
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.TP
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.B -l
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If the
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.B -l
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option is not specified,
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.I yacc
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will insert #line directives in the generated code.
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The #line directives let the C compiler relate errors in the
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generated code to the user's original code.
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If the \fB-l\fR option is specified,
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.I yacc
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will not insert the #line directives.
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Any #line directives specified by the user will be retained.
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.TP
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\fB-p \fIsymbol_prefix\fR
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The
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.B -p
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option changes the prefix prepended to yacc-generated symbols to
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the string denoted by
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.IR symbol_prefix.
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The default prefix is the string
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.IR yy.
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.TP
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.B -r
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The
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.B -r
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option causes
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.I yacc
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to produce separate files for code and tables. The code file
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is named
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.IR y.code.c,
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and the tables file is named
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.IR y.tab.c.
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.TP
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.B -t
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The
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.B -t
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option changes the preprocessor directives generated by
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.I yacc
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so that debugging statements will be incorporated in the compiled code.
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.TP
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.B -v
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The
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.B -v
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option causes a human-readable description of the generated parser to
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be written to the file
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.IR y.output.
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.RE
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.PP
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If the environment variable TMPDIR is set, the string denoted by
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TMPDIR will be used as the name of the directory where the temporary
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files are created.
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.SH FILES
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.IR y.code.c
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.br
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.IR y.tab.c
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.br
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.IR y.tab.h
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.br
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.IR y.output
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.br
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.IR /tmp/yacc.aXXXXXX
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.br
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.IR /tmp/yacc.tXXXXXX
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.br
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.IR /tmp/yacc.uXXXXXX
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.SH DIAGNOSTICS
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If there are rules that are never reduced, the number of such rules is
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reported on standard error.
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If there are any LALR(1) conflicts, the number of conflicts is reported
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on standard error.
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