restore formatters

src/args.jl

@@ -993,6 +993,15 @@ function RecipesPipeline.preprocess_attributes!(plotattributes::AKW)
         end
     end
 
+    # vline and others accesses the y argument but actually maps it to the x axis.
+    # Hence, we have to swap formatters
+    if treats_y_as_x(get(plotattributes, :seriestype, :path))
+        xformatter = get(plotattributes, :xformatter, :auto)
+        yformatter = get(plotattributes, :yformatter, :auto)
+        plotattributes[:xformatter] = yformatter
+        plotattributes[:yformatter] = xformatter
+    end
+
     # handle grid args common to all axes
     args = RecipesPipeline.pop_kw!(plotattributes, :grid, ())
     for arg in wraptuple(args)

src/pipeline.jl

@@ -57,8 +57,7 @@ end
 ## Preprocessing attributes
 function RecipesPipeline.preprocess_axis_args!(plt::Plot, plotattributes, letter)
     # Fix letter for seriestypes that are x only but data gets passed as y
-    if get(plotattributes, :seriestype, :path) in
-       (:vline, :vspan, :histogram, :barhist, :stephist, :scatterhist)
+    if treats_y_as_x(get(plotattributes, :seriestype, :path))
         if get(plotattributes, :orientation, :vertical) == :vertical
             letter = :x
         end

src/utils.jl

@@ -1,4 +1,6 @@
-
+function treats_y_as_x(seriestype)
+    return seriestype in (:vline, :vspan, :histogram, :barhist, :stephist, :scatterhist)
+end
 function replace_image_with_heatmap(z::Array{T}) where T<:Colorant
     n, m = size(z)
     colors = palette(vec(z))