// FilteredGenerator.script

// Takes a source generator, and a filter generator, which must both produce increasing values
// Produces values from the source generator that don't match values from the filter generator

to initialize
	set my nextFilteredValue to the nextValue of my filter
end initialize

to handle nextValue
	put the nextValue of my source into value -- get a candidate value
	
	-- advance the filter as needed if it is behind
	repeat while my nextFilteredValue is less than or equal to value
		-- advance value if it's equal to the next filtered value
		if my nextFilteredValue = value then set value to my source's nextValue
		set my nextFilteredValue to my filter's nextValue
	end repeat
	
	return value
end nextValue