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Special Forums News, Links, Events and Announcements Software Releases - RSS News JS/CC 0.30 (Default branch)
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Old 12-07-2008
JS/CC 0.30 (Default branch)
JS/CC is a parser generator for JavaScript and ECMAScript-derivates. It has been developed both with the intention of building a productive compiler development system and with the intention of creating an easy-to-use academic environment for people interested in how parse table generation is done generally in bottom-up parsing. The platform-independent software is entirely written in ECMAScript itself, and combines an integrated lexical analyzer generator with a LALR(1) parser generator. Image

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je::number

JE::Number(3pm) 					User Contributed Perl Documentation					   JE::Number(3pm)

NAME

       JE::Number - JavaScript number value

SYNOPSIS

	 use JE;
	 use JE::Number;

	 $j = JE->new;

	 $js_num = new JE::Number $j, 17;

	 $perl_num = $js_num->value;

	 $js_num->to_object; # returns a new JE::Object::Number

DESCRIPTION

       This class implements JavaScript number values for JE. The difference between this and JE::Object::Number is that that module implements
       number objects, while this module implements the primitive values.

       Right now, this module simply uses Perl numbers underneath for storing the JavaScript numbers. It seems that whether Perl numbers are in
       accord with the IEEE 754 standard that ECMAScript uses is system-dependent. If anyone requires IEEE 754 compliancy, a patch would be
       welcome. :-)

       The "new" method accepts a global (JE) object and a number as its two arguments. If the latter is an object with a "to_number" method whose
       return value isa JE::Number, that object's internal value will be used. Otherwise the arg itself is used. (The precise details of the
       behaviour of "new" when the second arg is a object are subject to change.) It is numified Perl-style, so 'nancy' becomes NaN and
       'information' becomes Infinity.

       The "value" method produces a Perl scalar. The "0+" numeric operator is overloaded and produces the same.

       Stringification and boolification are overloaded and produce the same results as in JavaScript

       The "typeof" and "class" methods produce the strings 'number' and 'Number', respectively.

SEE ALSO

       JE
       JE::Types
       JE::Object::Number

perl v5.14.2							    2012-03-18							   JE::Number(3pm)