1 files changed, 10 insertions, 11 deletions

diff --git a/examples/types.bdl b/examples/types.bdl
index 43b7be9..36dab7a 100644
--- a/examples/types.bdl
+++ b/examples/types.bdl
@@ -12,14 +12,14 @@
 (print "(boolean? (not 1)) -> ")    (boolean? (not 1))
 
 ;; Empty list/null.
-(print "(null? true) -> ")       (null? true)
-(print "(null? false) -> ")      (null? false)
-(print "(null? 1) -> ")          (null? 1)
-(print "(null? 5) -> ")          (null? 5)
-(print "(null? \"string\") -> ") (null? "string")
-(print "(null? (+ 1 2 3)) -> ")  (null? (+ 1 2 3))
-(print "(null? (not 1)) -> ")    (null? (not 1))
-(print "(null? ()) -> ")         (null? ())
+(print "(nil? true) -> ")       (nil? true)
+(print "(nil? false) -> ")      (nil? false)
+(print "(nil? 1) -> ")          (nil? 1)
+(print "(nil? 5) -> ")          (nil? 5)
+(print "(nil? \"string\") -> ") (nil? "string")
+(print "(nil? (+ 1 2 3)) -> ")  (nil? (+ 1 2 3))
+(print "(nil? (not 1)) -> ")    (nil? (not 1))
+(print "(nil? ()) -> ")         (nil? ())
 
 ;; String.
 (print "(string? true) -> ")       (string? true)
@@ -40,7 +40,6 @@
 (print "(fixnum? (not 1)) -> ")    (fixnum? (not 1))
 
 ;; Symbol
-;; TODO: We need quotation to test for symbols.
 (print "(symbol? true) -> ")       (symbol? true)
 (print "(symbol? false) -> ")      (symbol? false)
 (print "(symbol? 1) -> ")          (symbol? 1)
@@ -48,8 +47,8 @@
 (print "(symbol? \"string\") -> ") (symbol? "string")
 (print "(symbol? (+ 1 2 3)) -> ")  (symbol? (+ 1 2 3))
 (print "(symbol? (not 1)) -> ")    (symbol? (not 1))
-; (print "(symbol? 'a) -> ")         (symbol? 'a)
-; (print "(symbol? 'c) -> ")         (symbol? 'c)
+(print "(symbol? 'a) -> ")         (symbol? 'a)
+(print "(symbol? 'c) -> ")         (symbol? 'c)
 
 ;; Pair.
 (print "(pair? false) -> ")        (pair? false)