Rendering a reference appears to do a truthiness check because false renders an empty string despite rendering as "false" in an array element.

js/test_cases/not_exists/input1.json

@@ -0,0 +1 @@
+{"things": ["Alice", "Bob", "Chris"]}

js/test_cases/not_exists/input10.json

@@ -0,0 +1 @@
+{"things": {}}

js/test_cases/not_exists/input11.json

@@ -0,0 +1 @@
+["cat", "dog"]

js/test_cases/not_exists/input2.json

@@ -0,0 +1 @@
+{"things": {"name": "Alice", "keyboard": "K-Type"}}

js/test_cases/not_exists/input3.json

@@ -0,0 +1 @@
+{"there_are_no_things": 4}

js/test_cases/not_exists/input4.json

@@ -0,0 +1 @@
+{"things": "just a string"}

js/test_cases/not_exists/input5.json

@@ -0,0 +1 @@
+{"things": false}

js/test_cases/not_exists/input6.json

@@ -0,0 +1 @@
+{"things": null}

js/test_cases/not_exists/input7.json

@@ -0,0 +1 @@
+{"things": 0}

js/test_cases/not_exists/input8.json

@@ -0,0 +1 @@
+{"things": ""}

js/test_cases/not_exists/input9.json

@@ -0,0 +1 @@
+{"things": []}

js/test_cases/not_exists/main.dust

@@ -0,0 +1,5 @@
+{^things}
+Thing: {things}
+{:else}
+No things {.}
+{/things}

js/test_cases/render_unusual_types/input6.json

@@ -0,0 +1 @@
+{"name": false}

js/test_cases/render_unusual_types/input7.json

@@ -0,0 +1 @@
+{"name": true}

js/test_cases/render_unusual_types/input8.json

@@ -0,0 +1 @@
+{"name": [[], {}, true, false, ""]}

src/renderer/renderer.rs

@@ -99,7 +99,9 @@ impl<'a> DustRenderer<'a> {
             }
             DustTag::DTReference(reference) => {
                 let val = walk_path(breadcrumbs, &reference.path.keys);
-                if let Err(RenderError::NotFound { .. }) = val {
+                let loop_elements: Vec<&dyn ContextElement> = self.get_loop_elements(val)?;
+                if loop_elements.is_empty() {
+                    // if let Err(RenderError::NotFound { .. }) = val {
                     // If reference does not exist in the context, it becomes an empty string
                     return Ok("".to_owned());
                 } else {
@@ -151,6 +153,21 @@ impl<'a> DustRenderer<'a> {
                     };
                 }
             }
+            DustTag::DTNotExists(container) => {
+                let val = walk_path(breadcrumbs, &container.path.keys);
+                let loop_elements: Vec<&dyn ContextElement> = self.get_loop_elements(val)?;
+                if !loop_elements.is_empty() {
+                    return match &container.else_contents {
+                        Some(body) => self.render_body(&body, breadcrumbs),
+                        None => Ok("".to_owned()),
+                    };
+                } else {
+                    return match &container.contents {
+                        None => Ok("".to_owned()),
+                        Some(body) => self.render_body(&body, breadcrumbs),
+                    };
+                }
+            }
             _ => (), // TODO: Implement the rest
         }
         Ok("".to_owned())