solutions to 4.50..4.54

[sicp.git] / src / sicp / ex4_7.rkt

diff --git a/src/sicp/ex4_7.rkt b/src/sicp/ex4_7.rkt
index 956095d023d1988b1e6e52a03377b69a483f9595..8bb4aa08e7b1140f8ea140fa147d4524c8b041d1 100644 (file)
--- a/src/sicp/ex4_7.rkt
+++ b/src/sicp/ex4_7.rkt
@@ -1,5 +1,7 @@
 #lang racket
 
+(provide let*? let*->nested-lets)
+
 (define (tagged-list? exp tag)
   (if (pair? exp)
       (eq? (car exp) tag)