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4YACC(1)                  USER COMMANDS                    YACC(1)
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8NAME
9     Yacc ‐ an LALR(1) parser generator
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11SYNOPSIS
12     yacc [ ‐dlrtv ] [ ‐b _p_r_e_f_i_x ] _f_i_l_e_n_a_m_e
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14DESCRIPTION
15     _Y_a_c_c reads the grammar specification in  the  file  _f_i_l_e_n_a_m_e
16     and  generates  an LR(1) parser for it.  The parsers consist
17     of a set of LALR(1) parsing  tables  and  a  driver  routine
18     written in the C programming language.  _Y_a_c_c normally writes
19     the parse tables and the driver routine to the file _y._t_a_b._c.
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21     The following options are available:
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23          ‐b _p_r_e_f_i_x
24               The ‐b option changes the prefix prepended to  the
25               output file names to the string denoted by _p_r_e_f_i_x.
26               The default prefix is the character _y.
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28          ‐d   The ‐d option causes the header file _y._t_a_b._h to be
29               written.
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31          ‐l   If the ‐l  option  is  not  specified,  _y_a_c_c  will
32               insert  #line  directives  in  the generated code.
33               The #line directives let  the  C  compiler  relate
34               errors  in the generated code to the user’s origi‐
35               nal code.  If the ‐l  option  is  specified,  _y_a_c_c
36               will  not  insert  the  #line  directives.   #line
37               directives specified by the user will be retained.
38
39          ‐r   The ‐r option  causes  _y_a_c_c  to  produce  separate
40               files for code and tables.  The code file is named
41               _y._c_o_d_e._c, and the tables file is named _y._t_a_b._c.
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43          ‐t   The ‐t option changes the preprocessor  directives
44               generated  by  _y_a_c_c  so  that debugging statements
45               will be incorporated in the compiled code.
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47          ‐v   The ‐v option causes a human‐readable  description
48               of  the generated parser to be written to the file
49               _y._o_u_t_p_u_t.
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51     If the  environment  variable  TMPDIR  is  set,  the  string
52     denoted  by TMPDIR will be used as the name of the directory
53     where the temporary files are created.
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55FILES
56     _y._c_o_d_e._c
57     _y._t_a_b._c
58     _y._t_a_b._h
59     _y._o_u_t_p_u_t
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63Sun Release 4.1    Last change: July 15, 1990                   1
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70YACC(1)                  USER COMMANDS                    YACC(1)
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74     /_t_m_p/_y_a_c_c._a_X_X_X_X_X_X
75     /_t_m_p/_y_a_c_c._t_X_X_X_X_X_X
76     /_t_m_p/_y_a_c_c._u_X_X_X_X_X_X
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78DIAGNOSTICS
79     If there are rules that are never  reduced,  the  number  of
80     such  rules is reported on standard error.  If there are any
81     LALR(1) conflicts, the number of conflicts  is  reported  on
82     standard error.
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