Starting a type casting trait

src/bin.rs

@@ -5,6 +5,7 @@ use parser::Filter;
 use parser::OwnedLiteral;
 use parser::Template;
 use renderer::compile_template;
+use renderer::Castable;
 use renderer::CompileError;
 use renderer::ContextElement;
 use renderer::DustRenderer;
@@ -312,6 +313,12 @@ impl Loopable for serde_json::Value {
     }
 }
 
+impl Castable for serde_json::Value {
+    fn cast_to_type<'a>(&'a self, target: &str) -> Option<IceResult<'a>> {
+        todo!()
+    }
+}
+
 impl CompareContextElement for serde_json::Value {
     fn equals(&self, other: &dyn ContextElement) -> bool {
         // Handle other serde_json::Value