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4 .\" This code is derived from software contributed to Berkeley by
5 .\" Robert Paul Corbett.
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35 .\" @(#)yacc.1 5.8 (Berkeley) 5/24/93
36 .\" $FreeBSD: src/usr.bin/yacc/yacc.1,v 1.10.2.2 2003/02/25 03:07:40 trhodes Exp $
37 .\" $DragonFly: src/usr.bin/yacc/yacc.1,v 1.4 2006/02/17 19:39:18 swildner Exp $
44 .Nd an LALR(1) parser generator
48 .Op Fl b Ar file_prefix
49 .Op Fl o Ar output_filename
50 .Op Fl p Ar symbol_prefix
55 utility reads the grammar specification in the file
57 and generates an LR(1) parser for it.
58 The parsers consist of a set of LALR(1) parsing tables and a driver routine
59 written in the C programming language.
62 utility normally writes the parse tables and the driver routine to the file
65 The following options are available:
66 .Bl -tag -width indent
67 .It Fl b Ar file_prefix
68 Change the prefix prepended to the output file names to
71 The default prefix is the character
80 option is not specified,
82 will insert #line directives in the generated code.
83 The #line directives let the C compiler relate errors in the
84 generated code to the user's original code.
89 will not insert the #line directives.
90 Any #line directives specified by the user will be retained.
91 .It Fl o Ar output_filename
94 to write the generated code to
96 instead of the default file,
98 .It Fl p Ar symbol_prefix
99 Change the prefix prepended to yacc-generated symbols to
100 the string denoted by
102 The default prefix is the string
107 to produce separate files for code and tables. The code file
110 and the tables file is named
113 Change the preprocessor directives generated by
115 so that debugging statements will be incorporated in the compiled code.
117 Cause a human-readable description of the generated parser to
118 be written to the file
122 .Bl -tag -width ".Ev TMPDIR"
124 Name of directory where temporary files are to be created.
127 The names of the tables generated by this version of
130 .Va yylhs , yylen , yydefred , yydgoto , yysindex ,
131 .Va yyrindex , yygindex , yytable ,
134 Two additional tables,
140 is defined and non-zero.
142 .Bl -tag -width "Pa /tmp/yacc.aXXXXXXXXXX" -compact
147 .It Pa /tmp/yacc.aXXXXXXXXXX
148 .It Pa /tmp/yacc.tXXXXXXXXXX
149 .It Pa /tmp/yacc.uXXXXXXXXXX
150 .It Pa /usr/lib/liby.a
155 if not provided by the application
158 If there are rules that are never reduced,
159 the number of such rules is reported on standard error.
163 the number of conflicts is reported on standard error.
174 command appeared in PWB UNIX.