Mercurial > repos > deepakjadmin > mayatool3_test3
diff mayachemtools/docs/modules/man3/SimpleCalcParser.3 @ 0:73ae111cf86f draft
Uploaded
author | deepakjadmin |
---|---|
date | Wed, 20 Jan 2016 11:55:01 -0500 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mayachemtools/docs/modules/man3/SimpleCalcParser.3 Wed Jan 20 11:55:01 2016 -0500 @@ -0,0 +1,267 @@ +.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.22) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. Capital omega is used to do unbreakable dashes and +.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, +.\" nothing in troff, for use with C<>. +.tr \(*W- +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +'br\} +.\" +.\" Escape single quotes in literal strings from groff's Unicode transform. +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" +.\" If the F register is turned on, we'll generate index entries on stderr for +.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index +.\" entries marked with X<> in POD. Of course, you'll have to process the +.\" output yourself in some meaningful fashion. +.ie \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.el \{\ +. de IX +.. +.\} +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. No user-serviceable parts. +. \" fudge factors for nroff and troff +.if n \{\ +. ds #H 0 +. ds #V .8m +. ds #F .3m +. ds #[ \f1 +. ds #] \fP +.\} +.if t \{\ +. ds #H ((1u-(\\\\n(.fu%2u))*.13m) +. ds #V .6m +. ds #F 0 +. ds #[ \& +. ds #] \& +.\} +. \" simple accents for nroff and troff +.if n \{\ +. ds ' \& +. ds ` \& +. ds ^ \& +. ds , \& +. ds ~ ~ +. ds / +.\} +.if t \{\ +. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" +. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' +. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' +. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' +. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' +. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' +.\} +. \" troff and (daisy-wheel) nroff accents +.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' +.ds 8 \h'\*(#H'\(*b\h'-\*(#H' +.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] +.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' +.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' +.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] +.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] +.ds ae a\h'-(\w'a'u*4/10)'e +.ds Ae A\h'-(\w'A'u*4/10)'E +. \" corrections for vroff +.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' +.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' +. \" for low resolution devices (crt and lpr) +.if \n(.H>23 .if \n(.V>19 \ +\{\ +. ds : e +. ds 8 ss +. ds o a +. ds d- d\h'-1'\(ga +. ds D- D\h'-1'\(hy +. ds th \o'bp' +. ds Th \o'LP' +. ds ae ae +. ds Ae AE +.\} +.rm #[ #] #H #V #F C +.\" ======================================================================== +.\" +.IX Title "SIMPLECALCPARSER 1" +.TH SIMPLECALCPARSER 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::SimpleCalcParser +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +use Parsers::SimpleCalcParser ; +.PP +use Parsers::SimpleCalcParser qw(:all); +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBParsers::SimpleCalcParser\fR class provides the following methods: +.PP +new, yyclearin, yyerrok, yyerror, yyparse +.PP +\&\fBParsers::SimpleCalcParse.yy\fR parser grammer definition file implements a simple +calculator and is provided to highlight usage of lexer capability available through +\&\fBParsers::SimpleCalcYYLexer\fR, which in turn uses \fBParsers::YYLexer\fR and +\&\fBParsers::Lexer\fR classes to procide underlying lexer functionality. +.PP +The parser package and token table files, \fBParsers::SimpleCalcParser.pm\fR and +\&\fBSimpleCalcParser.tab.ph\fR, are automatically generated from parser grammar definition +file, \fBParsers::SimpleCalcParser.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 +.SS "\s-1METHODS\s0" +.IX Subsection "METHODS" +.IP "\fBnew\fR" 4 +.IX Item "new" +.Vb 4 +\& $SimpleCalcParser = new Parsers::SimpleCalcParser($YYLex, +\& \e&Parsers::SimpleCalcParser::yyerror); +\& $SimpleCalcParser = new Parsers::SimpleCalcParser($YYLex, +\& \e&Parsers::SimpleCalcParser::yyerror, $Debug); +.Ve +.Sp +Using specified \fIYYLex\fR \fIYYError\fR functions, \fBnew\fR method generates a new +\&\fBSimpleCalcParser\fR and returns a reference to newly created \fBSimpleCalcYYParser\fR object. +.Sp +Examples: +.Sp +.Vb 4 +\& # 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; +\& $SimpleCalcParser = new Parsers::SimpleCalcParser($YYLex, +\& \e&Parsers::SimpleCalcParser::yyerror, $Debug); +\& $Value = $SimpleCalcParser\->yyparse(); +\& print "Value = " . (defined($Value) ? "$Value" : "Undefined") . "\en"; +\& +\& # Input file... +\& $InputFile = "TestSimpleCalcParser.txt"; +\& open INPUTFILE, "$InputFile" or die "Couldn\*(Aqt open $InputFile: $!\en"; +\& +\& $YYLexer = new Parsers::SimpleCalcYYLexer(\e*INPUTFILE); +\& $YYLex = $YYLexer\->GetYYLex(); +\& +\& $Debug = 0; +\& $SimpleCalcParser = new Parsers::SimpleCalcParser($YYLex, +\& \e&Parsers::SimpleCalcParser::yyerror, $Debug); +\& $Value = $SimpleCalcParser\->yyparse(); +\& print "Value = " . (defined($Value) ? "$Value" : "Undefined") . "\en"; +\& +\& close INPUTFILE; +\& +\& # Input 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(); +\& +\& $Debug = 0; +\& $SimpleCalcParser = new Parsers::SimpleCalcParser($YYLex, +\& \e&Parsers::SimpleCalcParser::yyerror, $Debug); +\& $Value = $SimpleCalcParser\->yyparse(); +\& print "Value = " . (defined($Value) ? "$Value" : "Undefined") . "\en"; +\& +\& close INPUTFILE; +.Ve +.IP "\fByyclearin\fR" 4 +.IX Item "yyclearin" +.Vb 1 +\& $SimpleCalcParser\->yyclearin(); +.Ve +.Sp +\&\fByyclearin\fR method clears any previous look-ahead token after encountering a syntax error +during parsing. It can be used after \fByyerrok\fR in a grammer rule with the reserved word +\&\fBerror\fR. +.IP "\fByyerrok\fR" 4 +.IX Item "yyerrok" +.Vb 1 +\& $SimpleCalcParser\->yyerrok(); +.Ve +.Sp +\&\fByyerrok\fR method is used with the reserved word \fBerror\fR in grammer rule to indcate +error recovery is complete after encountering a syntax error during parsing. +.IP "\fByyerror\fR" 4 +.IX Item "yyerror" +.Vb 1 +\& $SimpleCalcParser\->yyerror(); +.Ve +.Sp +\&\fByyerror\fR function is provided for the caller to use during initialization of a parser. It +is used by \fByyparse\fR to print any error messages encountered during parsing of the +input. +.IP "\fByyparse\fR" 4 +.IX Item "yyparse" +.Vb 1 +\& $Value = $SimpleCalcParser\->yyparse(); +.Ve +.Sp +Returns \fIValue\fR after parsing all the input from a input stream using specified +grammer rules. +.SH "AUTHOR" +.IX Header "AUTHOR" +Manish Sud <msud@san.rr.com> +.SH "SEE ALSO" +.IX Header "SEE ALSO" +Lexer.pm, YYLexer.pm, SimpleCalcYYLexer.pm +.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.