This is experimental script for zigzag which uses type, method and array. Not recommend for actual usage, for pine script study maybe useful.
In this experiment, I use type as coded below. It seems have limitation as specially when push as array. As Trading View recommendation, pushing float and int into array especially for type not guarantee to work. I agree with that. Preferred to push array as line or label especially for types.
// @type Used for point especially for array
// @field x int value for bar_index
// @field y float value for price
// @field sty label style
// @field col color for text label
// @field str high or low string
type point
int x = na
float y = na
string sty = na
color col = na
string str = na
I simulate the arrays as below.
var dirLine = array.new<line>()
var dirLabel = array.new<label>()
var dirPoint = array.new<point>()
....
dirPoint.unshift(zigzag.createPoint(0))
dirLabel.unshift(zigzag.createLabel(fontSize, 0, true))
dirLine.unshift(zigzag.createLine(width, switchLine, 0, true))
Here are some results.