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

NAME

       JE::LValue - JavaScript lvalue class

SYNOPSIS

	 use JE::LValue;

	 $lv = new JE::LValue $some_obj, 'property_name';

	 $lv->get;	   # get property
	 $lv->set($value)  # set property

	 $lv->some_other_method  # same as $lv->get->some_other_method

DESCRIPTION

       This class implements JavaScript lvalues (called "Reference Types" by the ECMAScript specification).

METHODS AND OVERLOADING

       If a method is called that is not listed here, it will be passed to the property referenced by the lvalue. (See the last item in the
       SYNOPSIS, above.) For this reason, you should never call "UNIVERSAL::can" on a JE::LValue, but, rather, call it as a method
       ("$lv->can(...)"), unless you really know what you are doing.

       Similarly, if you try to use an overloaded operator, it will be passed on to the object that the lvalue references, such that "!$lvalue" is
       the same as calling "!$lvalue->get".

       $lv = new JE::LValue $obj, $property
	   Creates an lvalue/reference with $obj as the base object and $property as the property name. If $obj is undefined or null, a TypeError
	   is thrown.  To create a lvalue that has no base object, and which will throw a ReferenceError when "->get" is called and create a
	   global property upon invocation of "->set", pass an unblessed reference to a global object as the first argument. (This is used by bare
	   identifiers in JS expressions.)

       $lv->get
	   Gets the value of the property.

       $lv->set($value)
	   Sets the property to $value and returns $value. If the lvalue has no base object, the global object will become its base object
	   automatically.  <Note:> Whether the lvalue object itself is modified in the latter case is not set in stone yet. (Currently it is
	   modified, but that may change.)

       $lv->call(@args)
	   If the property is a function, this calls the function with the base object as the 'this' value.

       $lv->base
	   Returns the base object. If there isn't any, it returns undef or an empty list, depending on context.

       $lv->property
	   Returns the property name.

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