Implemented none and any, but I need to implement early termination.

js/test_cases/helpers_select/main.dust

@@ -100,3 +100,11 @@ Early termination stand-alone comparison{~n}
         If your pet was a {type} we'd name it {pet_name}{~n}
     {/pet_names}
 {/select}{~n}
+
+@any alone{~n}
+=========={~n}
+{@any}{person} has a pet!{~n}{/any}
+
+@none alone{~n}
+==========={~n}
+{@none}I don't know what to name {person}'s pet...{~n}{/none}

src/renderer/renderer.rs

@@ -601,8 +601,40 @@ impl<'a> DustRenderer<'a> {
                     }
                 }
             }
-            DustTag::DTHelperAny(parameterized_block) => todo!(),
-            DustTag::DTHelperNone(parameterized_block) => todo!(),
+            DustTag::DTHelperAny(parameterized_block) => match select_context {
+                Some(sc) if sc.were_any_true => {
+                    let new_breadcrumbs = self.new_breadcrumbs_partial(
+                        breadcrumbs,
+                        breadcrumbs,
+                        None,
+                        &parameterized_block.explicit_context,
+                    );
+                    return self.render_maybe_body(
+                        &parameterized_block.contents,
+                        new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
+                        blocks,
+                        None,
+                    );
+                }
+                _ => return Ok("".to_owned()),
+            },
+            DustTag::DTHelperNone(parameterized_block) => match select_context {
+                Some(sc) if !sc.were_any_true => {
+                    let new_breadcrumbs = self.new_breadcrumbs_partial(
+                        breadcrumbs,
+                        breadcrumbs,
+                        None,
+                        &parameterized_block.explicit_context,
+                    );
+                    return self.render_maybe_body(
+                        &parameterized_block.contents,
+                        new_breadcrumbs.as_ref().unwrap_or(breadcrumbs),
+                        blocks,
+                        None,
+                    );
+                }
+                _ => return Ok("".to_owned()),
+            },
         }
 
         Ok("".to_owned())