add True, False, None

test/corpus/if.txt

@@ -156,3 +156,29 @@ If Operator Adjacent To Value
 {% if 1and 2 %}yes{% endif %}
 
 ---
+
+==================
+If Is Not None
+==================
+
+{% if status is not None %}yes{% endif %}
+
+---
+
+(template
+  (content)
+  (if_group
+    (if_clause
+      (predicate
+        (filtered_value
+          (value
+            (variable_attribute
+              (identifier))))
+        (binaryOperator)
+        (filtered_value
+          (value
+            (literal
+              (none)))))
+      (template
+        (content))))
+  (content))

test/corpus/template_variable.txt

@@ -361,3 +361,103 @@ Template Variable With Spaced Filter
       (filter_expression
         (filter))))
   (content))
+
+==================
+Template Variable True
+==================
+
+{{ True }}
+
+---
+
+(template
+  (content)
+  (template_variable
+    (filtered_value
+      (value
+        (literal
+          (boolean)))))
+  (content))
+
+==================
+Template Variable False
+==================
+
+{{ False }}
+
+---
+
+(template
+  (content)
+  (template_variable
+    (filtered_value
+      (value
+        (literal
+          (boolean)))))
+  (content))
+
+==================
+Template Variable None
+==================
+
+{{ None }}
+
+---
+
+(template
+  (content)
+  (template_variable
+    (filtered_value
+      (value
+        (literal
+          (none)))))
+  (content))
+
+==================
+Template Variable Boolean As Filter Argument
+==================
+
+{{ value|default:True }}
+
+---
+
+(template
+  (content)
+  (template_variable
+    (filtered_value
+      (value
+        (variable_attribute
+          (identifier)))
+      (filter_expression
+        (filter
+          argument: (value
+            (literal
+              (boolean)))))))
+  (content))
+
+==================
+Template Variable Name Beginning With A Literal
+==================
+
+{{ Truest }}
+
+---
+
+(template
+  (content)
+  (template_variable
+    (filtered_value
+      (value
+        (variable_attribute
+          (identifier)))))
+  (content))
+
+==================
+Template Variable Attribute Of A Literal
+:error
+==================
+
+{{ None.x }}
+
+---
+

test/corpus/with.txt

@@ -111,3 +111,24 @@ With Repeating A Binding Of The Tag Before It
       (template
         (content))))
   (content))
+
+==================
+With A Binding Named After A Literal
+==================
+
+{% with True=1 %}a{% endwith %}
+
+---
+
+(template
+  (content)
+  (with_group
+    (with_clause
+      variable: (identifier)
+      (filtered_value
+        (value
+          (literal
+            (number))))
+      (template
+        (content))))
+  (content))