JavaScript::Generator - Boxed Perl object of a JavaScript generator

JavaScript documentation Contained in the JavaScript distribution.

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NAME

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JavaScript::Generator - Boxed Perl object of a JavaScript generator

DESCRIPTION

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Generators were introduced in JavaScript 1.7. When you 'yield' from JS you'll be returned an instance of this class that you can use to retrieve the next value from the generator.

For example

  function fib() {  
    var i = 0, j = 1;  
    while (true) {  
      yield i;  
      var t = i;  
      i = j;  
      j += t;  
    }  
  }  

  var g = fib();  
  for (var i = 0; i < 10; i++) {  
    document.write(g.next() + "<br>\n");  
  }

INTERFACE

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INSTANCE METHODS

next

Retrieve the next value.

JavaScript documentation Contained in the JavaScript distribution. 
package JavaScript::Generator;

use strict;
use warnings;

use base 'JavaScript::Boxed';

my $NF = undef;

sub next {
  my $self = shift;

  ## this just gives a function we can use to do all the hard work...
  my $NF   ||= $self->context->eval(q!function(aGenerator) { var n = aGenerator.next(); return n; }!);

  return $NF->( $self );
}

1;
__END__