diff mayachemtools/docs/modules/man3/SimpleCalcYYLexer.3 @ 0:73ae111cf86f draft

Uploaded

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+++ b/mayachemtools/docs/modules/man3/SimpleCalcYYLexer.3	Wed Jan 20 11:55:01 2016 -0500
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+.\" ========================================================================
+.\"
+.IX Title "SIMPLECALCYYLEXER 1"
+.TH SIMPLECALCYYLEXER 1 "2015-03-29" "perl v5.14.2" "MayaChemTools"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+Parsers::SimpleCalcYYLexer
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+use Parsers::SimpleCalcYYLexer;
+.PP
+use Parsers::SimpleCalcYYLexer qw(:all);
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fBSimpleCalcYYLexer\fR class provides the following methods:
+.PP
+new, YYLex, GetYYLex, StringifySimpleCalcYYLexer
+.PP
+\&\fBParser::SimpleCalcYYLexer\fR class is derived from \fBParser::YYLexer\fR class, which in
+turn is derived from base class \fBParser::Lexer\fR that provides all the underlying
+lexer functionality. \fBSimpleCalcYYLexer\fR class is designed to be used with
+\&\fByyparse\fR code generated by running \fBbyacc\fR on a parser defined using
+parser definition \fBSimpleCalcParser.yy\fR file.
+.PP
+The parser package and token table files, \fBSimpleCalcParser.pm\fR and \fBSimpleCalcParser.tab.ph\fR,
+are automatically generated from parser grammar definition file, \fBSimpleCalcParser.yy\fR, using
+byacc available through perl\-byacc1.8 modified with perl5\-byacc\-patches\-0.5 for generation
+of object oriented parser:
+.PP
+.Vb 2
+\&    byacc \-l \-P \-d \-b SimpleCalcParser SimpleCalcParser.yy
+\&    mv SimpleCalcParser.tab.pl SimpleCalcParser.pm
+.Ve
+.PP
+\&\fBSimpleCalcYYLexer.pm\fR class implements a lexer for a simple calculator and is provided
+to highlight usasge of \fBYYLex\fR through \fByyparse\fR.
+.PP
+The default specification of lexer tokens for \fBSimpleCalcYYLexer.pm\fR includes:
+.PP
+.Vb 11
+\&    @YYLexerTokensSpec = (
+\&        [ \*(AqLETTER\*(Aq, qr/[a\-zA\-Z]/ ],
+\&        [ \*(AqNUMBER\*(Aq, qr/\ed+/ ],
+\&        [ \*(AqSPACE\*(Aq, qr/[ ]*/,
+\&            sub { my($This, $TokenLabel, $MatchedText) = @_; return \*(Aq\*(Aq; }
+\&        ],
+\&        [ \*(AqNEWLINE\*(Aq, qr/(?:\er\en|\er|\en)/,
+\&            sub { my($This, $TokenLabel, $MatchedText) = @_;  return "\en"; }
+\&        ],
+\&        [ \*(AqCHAR\*(Aq, qr/./ ]
+\&    );
+.Ve
+.PP
+The default \fBSimpleCalcParser.tab.ph\fR file containing token identifiers for
+\&\fBSimpleCalcParser.yy\fR includes:
+.PP
+.Vb 2
+\&    $NUMBER=257;
+\&    $LETTER=258;
+.Ve
+.SS "\s-1METHODS\s0"
+.IX Subsection "METHODS"
+.IP "\fBnew\fR" 4
+.IX Item "new"
+.Vb 1
+\&    $SimpleCalcYYLexer = new Parsers::SimpleCalcYYLexer($Input);
+.Ve
+.Sp
+Using specified \fIInput\fR, \fBnew\fR method generates a new \fBSimpleCalcYYLexer\fR
+and returns a reference to newly created \fBSimpleCalcYYLexer\fR object.
+.Sp
+Examples:
+.Sp
+.Vb 2
+\&    # Input string...
+\&    $InputText = "3 + 4 +6\enx=3\eny=5\enx+y\enx+z\en";
+\&
+\&    $YYLexer = new Parsers::SimpleCalcYYLexer($InputText);
+\&    $YYLex = $YYLexer\->GetYYLex();
+\&
+\&    $Debug = 0;
+\&    $CalcParser = new Parsers::SimpleCalcParser($YYLex,
+\&                            \e&Parsers::SimpleCalcParser::yyerror, $Debug);
+\&    $Value = $SimpleCalcParser\->yyparse();
+\&    print "Value: $Value\en";
+\&
+\&    # Input file...
+\&    $InputFile = "Input.txt";
+\&    open INPUTFILE, "$InputFile" or die "Couldn\*(Aqt open $InputFile: $!\en";
+\&    $YYLexer = new Parsers::SimpleCalcYYLexer($InputFile);
+\&    $YYLex = $YYLexer\->GetYYLex();
+\&
+\&    $CalcParser = new Parsers::SimpleCalcParser($YYLex,
+\&                            \e&Parsers::SimpleCalcParser::yyerror);
+\&    $Value = $SimpleCalcParser\->yyparse();
+\&    print "Value: $Value\en";
+\&
+\&    # Input file iterator...
+\&    $InputFile = "TestSimpleCalcParser.txt";
+\&    open INPUTFILE, "$InputFile" or die "Couldn\*(Aqt open $InputFile: $!\en";
+\&    $InputIterator = sub { return <INPUTFILE>; };
+\&    $YYLexer = new Parsers::SimpleCalcYYLexer($InputIterator);
+\&    $YYLex = $YYLexer\->GetYYLex();
+\&
+\&    $CalcParser = new Parsers::SimpleCalcParser($YYLex,
+\&                            \e&Parsers::SimpleCalcParser::yyerror);
+\&    $Value = $SimpleCalcParser\->yyparse();
+\&    print "Value: $Value\en";
+.Ve
+.IP "\fBStringifySimpleCalcYYLexer\fR" 4
+.IX Item "StringifySimpleCalcYYLexer"
+.Vb 1
+\&    $YYLexerString = $YYLexer\->StringifySimpleCalcYYLexer();
+.Ve
+.Sp
+Returns a string containing information about \fIYYLexer\fR object.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Manish Sud <[e-mail]>
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+Lexer.pm, YYLexer.pm, SimpleCalcParser.yy
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright (C) 2015 Manish Sud. All rights reserved.
+.PP
+This file is part of MayaChemTools.
+.PP
+MayaChemTools is free software; you can redistribute it and/or modify it under
+the terms of the \s-1GNU\s0 Lesser General Public License as published by the Free
+Software Foundation; either version 3 of the License, or (at your option)
+any later version.