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JE::Object::RegExp(3) User Contributed Perl DocumentationJE::Object::RegExp(3)

NAME
       JE::Object::RegExp - JavaScript regular expression (RegExp object)
       class

SYNOPSIS
	 use JE;
	 use JE::Object::RegExp;

	 $j = new JE;

	 $js_regexp = new JE::Object::RegExp $j, "(.*)", 'ims';

	 $perl_qr = $js_regexp->value;

	 $some_string =~ $js_regexp; # You can use it as a qr//

DESCRIPTION
       This class implements JavaScript	regular	expressions for	JE.

       See JE::Types for a description of most of the interface. Only what is
       specific	to JE::Object::RegExp is explained here.

       A RegExp	object will stringify the same way as a	"qr//",	so that	you
       can use "=~" on it. This	is different from the return value of the
       "to_string" method (the way it stringifies in JS).

       Since JE's regular expressions use Perl's engine	underneath, the
       features	that Perl provides that	are not	part of	the ECMAScript spec
       are supported, except for "(?s)"	and "(?m)", which don't	do anything,
       and "(?|...)", which is unpredictable.

       In versions prior to 0.042, a hyphen adjacent to	"\d", "\s" or "\w" in
       a character class would be unpredictable	(sometimes a syntax error).
       Now it is interpreted literally.	This matches what most implementations
       do, which happens to be the same	as Perl's behaviour. (It is a syntax
       error in	ECMAScript.)

METHODS
       value
	   Returns a Perl "qr//" regular expression.

	   If the regular expression or	the string that	is being matched
	   against it contains characters outside the Basic Multilingual Plane
	   (whose character codes exceed 0xffff), the behavior is
	   undefined--for now at least.	I still	need to	solve the problem
	   caused by JS's unintuitive use of raw surrogates. (In JS, "/../"
	   will	match a	surrogate pair,	which is considered to be one
	   character in	Perl. This means that the same regexp matched against
	   the same string will	produce	different results in Perl and JS.)

       class
	   Returns the string 'RegExp'.

SEE ALSO
       JE
       JE::Types
       JE::Object

perl v5.24.1			  2014-10-20		 JE::Object::RegExp(3)

NAME | SYNOPSIS | DESCRIPTION | METHODS | SEE ALSO

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