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Annotation of 43BSDReno/old/yacc/yacc.1, revision 1.1

1.1     ! root        1: .\"    @(#)yacc.1      6.1 (Berkeley) 4/29/85
        !             2: .\"
        !             3: .TH YACC 1 "April 29, 1985"
        !             4: .AT 3
        !             5: .SH NAME
        !             6: yacc \- yet another compiler-compiler
        !             7: .SH SYNOPSIS
        !             8: .B yacc
        !             9: [
        !            10: .B \-vd
        !            11: ]
        !            12: grammar
        !            13: .SH DESCRIPTION
        !            14: .I Yacc
        !            15: converts a context-free grammar into a set of
        !            16: tables for a simple automaton which executes an LR(1) parsing
        !            17: algorithm.
        !            18: The grammar may be ambiguous;
        !            19: specified precedence rules are used to break ambiguities.
        !            20: .PP
        !            21: The output file,
        !            22: .IR y.tab.c ,
        !            23: must be compiled by the C compiler
        !            24: to produce a program
        !            25: .IR yyparse .
        !            26: This program must be loaded with the lexical analyzer program,
        !            27: .IR yylex ,
        !            28: as well as
        !            29: .I main
        !            30: and
        !            31: .IR yyerror ,
        !            32: an error handling routine.
        !            33: These routines must be supplied by the user;
        !            34: .IR Lex (1)
        !            35: is useful for creating lexical analyzers usable by
        !            36: .IR yacc .
        !            37: .PP
        !            38: If the
        !            39: .B \-v
        !            40: flag is given, the file
        !            41: .I y.output
        !            42: is prepared, which contains a description of the parsing tables
        !            43: and a report on
        !            44: conflicts generated by ambiguities in the grammar.
        !            45: .PP
        !            46: If the \-\fBd\fR flag is used, the file
        !            47: .I y.tab.h
        !            48: is generated with the
        !            49: .I define
        !            50: statements that associate the
        !            51: .I yacc\c
        !            52: -assigned `token codes' with the user-declared `token names'.
        !            53: This allows source files other than
        !            54: .I y.tab.c
        !            55: to access the token codes.
        !            56: .SH FILES
        !            57: .ta \w'yacc.tmp, yacc.acts 'u
        !            58: y.output
        !            59: .br
        !            60: y.tab.c
        !            61: .br
        !            62: y.tab.h        defines for token names
        !            63: .br
        !            64: yacc.tmp, yacc.acts    temporary files
        !            65: .br
        !            66: /usr/lib/yaccpar       parser prototype for C programs
        !            67: .SH "SEE ALSO"
        !            68: .IR lex (1)
        !            69: .br
        !            70: .I "LR Parsing"
        !            71: by A. V. Aho and S. C. Johnson,
        !            72: Computing Surveys, June, 1974.
        !            73: .br
        !            74: .I "YACC \- Yet Another Compiler Compiler"
        !            75: by S. C. Johnson.
        !            76: .SH DIAGNOSTICS
        !            77: The number of reduce-reduce and shift-reduce conflicts
        !            78: is reported on the standard output;
        !            79: a more detailed report is
        !            80: found in the
        !            81: .I y.output
        !            82: file.
        !            83: Similarly, if some rules are not reachable from the
        !            84: start symbol, this is also reported.
        !            85: .SH BUGS
        !            86: Because file names are fixed, at most one
        !            87: .I yacc
        !            88: process can be active in a given directory at
        !            89: a time.

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