Document XPath funs

docs/_plugins/render_block.rb

@@ -0,0 +1,19 @@
+require 'pp'
+#
+# Tags to create a complex object inline in JSON.
+#
+class RenderBlock < Liquid::Block
+
+  def initialize(tag_name, arg, tokens)
+    super
+    @body = tokens
+  end
+
+  def render(context)
+    template = @body.render(context)
+    pp template
+    pp Liquid::Template.parse(template).render(context)
+  end
+end
+
+Liquid::Template.register_tag('render', RenderBlock)