Adding NotFound error type.

src/renderer/errors.rs

@@ -14,6 +14,10 @@ pub enum RenderError<'a> {
         segment: String,
         elem: &'a dyn ContextElement,
     },
+    NotFound {
+        path: &'a Vec<&'a str>,
+        breadcrumbs: Vec<&'a dyn ContextElement>,
+    },
     /// Attempting to render and unrenderable type (for example, an object without any filters)
     CantRender {
         elem: &'a dyn ContextElement,
@@ -36,6 +40,9 @@ impl fmt::Display for RenderError<'_> {
                 write!(f, "Failed to walk to {} from {:?}", segment, elem)
             }
             RenderError::CantRender { elem } => write!(f, "Cant render {:?}", elem),
+            RenderError::NotFound { path, breadcrumbs } => {
+                write!(f, "Could not find {:?} in {:?}", path, breadcrumbs)
+            }
         }
     }
 }
@@ -51,6 +58,9 @@ impl fmt::Debug for RenderError<'_> {
                 write!(f, "Failed to walk to {} from {:?}", segment, elem)
             }
             RenderError::CantRender { elem } => write!(f, "Cant render {:?}", elem),
+            RenderError::NotFound { path, breadcrumbs } => {
+                write!(f, "Could not find {:?} in {:?}", path, breadcrumbs)
+            }
         }
     }
 }

src/renderer/renderer.rs

@@ -212,6 +212,13 @@ fn new_walk_path<'a>(
     breadcrumbs: Vec<&'a dyn ContextElement>,
     path: &Vec<&str>,
 ) -> Result<&'a dyn ContextElement, RenderError<'a>> {
+    for context in breadcrumbs.iter().rev() {
+        match walk_path_from_single_level(*context, path)? {
+            WalkResult::NoWalk => {}
+            WalkResult::PartialWalk => {}
+            WalkResult::FullyWalked(_) => {}
+        }
+    }
     Err(RenderError::Generic("temp".to_owned()))
 }