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5 .\" Robert Paul Corbett.
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31 .\" @(#)yacc.1 5.8 (Berkeley) 5/24/93
33 .\" $OpenBSD: yacc.1,v 1.14 2001/05/01 17:58:05 aaron Exp $
40 .Nd an LALR(1) parser generator
44 .Op Fl b Ar file_prefix
45 .Op Fl o Ar output_filename
46 .Op Fl p Ar symbol_prefix
51 utility reads the grammar specification in the file
53 and generates an LR(1) parser for it.
54 The parsers consist of a set of LALR(1) parsing tables and a driver routine
55 written in the C programming language.
58 utility normally writes the parse tables and the driver routine to the file
61 The following options are available:
62 .Bl -tag -width indent
63 .It Fl b Ar file_prefix
64 Change the prefix prepended to the output file names to
67 The default prefix is the character
76 option is not specified,
78 will insert #line directives in the generated code.
79 The #line directives let the C compiler relate errors in the
80 generated code to the user's original code.
85 will not insert the #line directives.
86 Any #line directives specified by the user will be retained.
87 .It Fl o Ar output_filename
90 to write the generated code to
92 instead of the default file,
94 .It Fl p Ar symbol_prefix
95 Change the prefix prepended to yacc-generated symbols to
98 The default prefix is the string
103 to produce separate files for code and tables.
107 and the tables file is named
110 Change the preprocessor directives generated by
112 so that debugging statements will be incorporated in the compiled code.
114 Cause a human-readable description of the generated parser to
115 be written to the file
118 NOOP for bison compatibility.
120 is already designed to be POSIX yacc compatible.
123 .Bl -tag -width ".Ev TMPDIR"
125 Name of directory where temporary files are to be created.
128 The names of the tables generated by this version of
131 .Va yylhs , yylen , yydefred , yydgoto , yysindex ,
132 .Va yyrindex , yygindex , yytable ,
135 Two additional tables,
141 is defined and non-zero.
143 .Bl -tag -width "Pa /tmp/yacc.aXXXXXXXXXX" -compact
148 .It Pa /tmp/yacc.aXXXXXXXXXX
149 .It Pa /tmp/yacc.tXXXXXXXXXX
150 .It Pa /tmp/yacc.uXXXXXXXXXX
153 If there are rules that are never reduced,
154 the number of such rules is reported on standard error.
158 the number of conflicts is reported on standard error.
169 command appeared in PWB UNIX.