Merge pull request #13 from jfacorro/jfacorro.12.encode_impl_for_any

[Closes #12] Encode protocol implementation for Any, but actually only for s…

lib/ex_edn/encode.ex

@@ -6,6 +6,7 @@ alias ExEdn.UUID
 alias ExEdn.Tag
 
 defprotocol ExEdn.Encode do
+  @fallback_to_any true
   def encode(value)
 end
 
@@ -101,3 +102,12 @@ defimpl Encode, for: Timex.DateTime do
     Encode.encode(Tag.new("inst", value))
   end
 end
+
+defimpl Encode, for: Any do
+  def encode(struct) when is_map(struct) do
+    Encode.encode(Map.from_struct(struct))
+  end
+  def encode(_)  do
+    raise Protocol.UndefinedError
+  end
+end

test/ex_edn_test.exs

@@ -132,6 +132,12 @@ defmodule ExEdnTest do
     assert encode!(some_tag) == "#custom/tag :joni"
   end
 
+  test "Encode Fallback to Any" do
+    node = %ExEdn.Parser.Node{}
+    map = Map.from_struct(node)
+    assert encode!(node) == encode!(map)
+  end
+
   test "Encode Unknown Type" do
     e = %Protocol.UndefinedError{}
     assert encode(self) == {:error, e.__struct__}