| 1 | .\" Copyright (c) 1989, 1990 The Regents of the University of California.
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| 2 | .\" All rights reserved.
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| 3 | .\"
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| 4 | .\" This code is derived from software contributed to Berkeley by
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| 5 | .\" Robert Paul Corbett.
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| 6 | .\"
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| 7 | .\" Redistribution and use in source and binary forms, with or without
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| 8 | .\" modification, are permitted provided that the following conditions
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| 9 | .\" are met:
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| 10 | .\" 1. Redistributions of source code must retain the above copyright
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| 11 | .\" notice, this list of conditions and the following disclaimer.
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| 12 | .\" 2. Redistributions in binary form must reproduce the above copyright
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| 13 | .\" notice, this list of conditions and the following disclaimer in the
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| 14 | .\" documentation and/or other materials provided with the distribution.
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| 15 | .\" 3. All advertising materials mentioning features or use of this software
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| 16 | .\" must display the following acknowledgement:
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| 17 | .\" This product includes software developed by the University of
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| 18 | .\" California, Berkeley and its contributors.
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| 19 | .\" 4. Neither the name of the University nor the names of its contributors
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| 20 | .\" may be used to endorse or promote products derived from this software
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| 21 | .\" without specific prior written permission.
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| 22 | .\"
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| 23 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 24 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 27 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | .\" SUCH DAMAGE.
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| 34 | .\"
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| 35 | .\" @(#)yacc.1 5.8 (Berkeley) 5/24/93
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| 36 | .\" $FreeBSD: src/usr.bin/yacc/yacc.1,v 1.17 2005/01/18 13:43:56 ru Exp $
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| 37 | .\" $OpenBSD: yacc.1,v 1.14 2001/05/01 17:58:05 aaron Exp $
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| 38 | .\"
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| 39 | .Dd May 24, 1993
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| 40 | .Dt YACC 1
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| 41 | .Os
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| 42 | .Sh NAME
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| 43 | .Nm yacc
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| 44 | .Nd an LALR(1) parser generator
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| 45 | .Sh SYNOPSIS
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| 46 | .Nm
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| 47 | .Op Fl dlrtv
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| 48 | .Op Fl b Ar file_prefix
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| 49 | .Op Fl o Ar output_filename
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| 50 | .Op Fl p Ar symbol_prefix
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| 51 | .Ar filename
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| 52 | .Sh DESCRIPTION
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| 53 | The
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| 54 | .Nm
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| 55 | utility reads the grammar specification in the file
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| 56 | .Ar filename
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| 57 | and generates an LR(1) parser for it.
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| 58 | The parsers consist of a set of LALR(1) parsing tables and a driver routine
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| 59 | written in the C programming language.
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| 60 | The
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| 61 | .Nm
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| 62 | utility normally writes the parse tables and the driver routine to the file
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| 63 | .Pa y.tab.c .
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| 64 | .Pp
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| 65 | The following options are available:
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| 66 | .Bl -tag -width indent
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| 67 | .It Fl b Ar file_prefix
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| 68 | Change the prefix prepended to the output file names to
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| 69 | the string denoted by
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| 70 | .Ar file_prefix .
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| 71 | The default prefix is the character
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| 72 | .Pa y .
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| 73 | .It Fl d
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| 74 | Cause the header file
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| 75 | .Pa y.tab.h
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| 76 | to be written.
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| 77 | .It Fl l
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| 78 | If the
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| 79 | .Fl l
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| 80 | option is not specified,
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| 81 | .Nm
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| 82 | will insert #line directives in the generated code.
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| 83 | The #line directives let the C compiler relate errors in the
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| 84 | generated code to the user's original code.
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| 85 | If the
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| 86 | .Fl l
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| 87 | option is specified,
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| 88 | .Nm
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| 89 | will not insert the #line directives.
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| 90 | Any #line directives specified by the user will be retained.
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| 91 | .It Fl o Ar output_filename
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| 92 | Cause
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| 93 | .Nm
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| 94 | to write the generated code to
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| 95 | .Ar output_filename
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| 96 | instead of the default file,
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| 97 | .Pa y.tab.c .
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| 98 | .It Fl p Ar symbol_prefix
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| 99 | Change the prefix prepended to yacc-generated symbols to
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| 100 | the string denoted by
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| 101 | .Ar symbol_prefix .
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| 102 | The default prefix is the string
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| 103 | .Pa yy .
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| 104 | .It Fl r
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| 105 | Cause
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| 106 | .Nm
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| 107 | to produce separate files for code and tables.
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| 108 | The code file
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| 109 | is named
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| 110 | .Pa y.code.c ,
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| 111 | and the tables file is named
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| 112 | .Pa y.tab.c .
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| 113 | .It Fl t
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| 114 | Change the preprocessor directives generated by
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| 115 | .Nm
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| 116 | so that debugging statements will be incorporated in the compiled code.
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| 117 | .It Fl v
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| 118 | Cause a human-readable description of the generated parser to
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| 119 | be written to the file
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| 120 | .Pa y.output .
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| 121 | .El
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| 122 | .Sh ENVIRONMENT
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| 123 | .Bl -tag -width ".Ev TMPDIR"
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| 124 | .It Ev TMPDIR
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| 125 | Name of directory where temporary files are to be created.
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| 126 | .El
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| 127 | .Sh TABLES
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| 128 | The names of the tables generated by this version of
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| 129 | .Nm
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| 130 | are
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| 131 | .Va yylhs , yylen , yydefred , yydgoto , yysindex ,
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| 132 | .Va yyrindex , yygindex , yytable ,
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| 133 | and
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| 134 | .Va yycheck .
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| 135 | Two additional tables,
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| 136 | .Va yyname
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| 137 | and
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| 138 | .Va yyrule ,
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| 139 | are created if
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| 140 | .Dv YYDEBUG
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| 141 | is defined and non-zero.
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| 142 | .Sh FILES
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| 143 | .Bl -tag -width "Pa /tmp/yacc.aXXXXXXXXXX" -compact
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| 144 | .It Pa y.code.c
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| 145 | .It Pa y.tab.c
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| 146 | .It Pa y.tab.h
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| 147 | .It Pa y.output
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| 148 | .It Pa /tmp/yacc.aXXXXXXXXXX
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| 149 | .It Pa /tmp/yacc.tXXXXXXXXXX
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| 150 | .It Pa /tmp/yacc.uXXXXXXXXXX
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| 151 | .El
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| 152 | .Sh DIAGNOSTICS
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| 153 | If there are rules that are never reduced,
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| 154 | the number of such rules is reported on standard error.
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| 155 | If there are any
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| 156 | .Tn LALR(1)
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| 157 | conflicts,
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| 158 | the number of conflicts is reported on standard error.
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| 159 | .Sh SEE ALSO
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| 160 | .Xr yyfix 1
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| 161 | .Sh STANDARDS
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| 162 | The
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| 163 | .Nm
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| 164 | utility conforms to
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| 165 | .St -p1003.2 .
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| 166 | .Sh HISTORY
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| 167 | A
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| 168 | .Nm
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| 169 | command appeared in PWB UNIX.
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