Pass namespace to XML.build

Author: lucacorti

lib/sassone/builder.ex

@@ -153,7 +153,7 @@ defimpl Sassone.Builder, for: Any do
         unquote(end_element)
 
         def attributes(_t), do: unquote(Macro.escape(attributes))
-        def build(t), do: XML.build(t, Builder.root_element(t))
+        def build(t), do: XML.build(t, Builder.namespace(t), Builder.root_element(t))
         def elements(_t), do: unquote(Macro.escape(elements))
         def handler(_t), do: __MODULE__
         def namespace(_t), do: unquote(options[:namespace])

lib/sassone/xml.ex

@@ -96,7 +96,7 @@ defmodule Sassone.XML do
 
   @doc "Builds a struct deriving `Sassone.Builder` for encoding with `Sassone.encode!/2`"
   @spec build(Builder.t(), name()) :: element()
-  def build(struct, element_name) do
+  def build(struct, namespace \\ nil, element_name) do
     attributes =
       Builder.attributes(struct)
       |> Enum.reduce([], &build_attributes(struct, &1, &2))
@@ -107,7 +107,7 @@ defmodule Sassone.XML do
       |> Enum.reduce([], &build_elements(struct, &1, &2))
       |> Enum.reverse()
 
-    element(Builder.namespace(struct), element_name, attributes, elements)
+    element(namespace, element_name, attributes, elements)
   end
 
   defp build_attributes(_struct, %Field{build: false}, attributes),