add empty to the list of things that are not structs for HtDP langs

svn: r17563
2010-01-08 13:38:48 +00:00 · 2010-01-08 13:38:48 +00:00 · 1086cefc7a
commit 1086cefc7a
parent 01b42b6ba3
1 changed files with 1 additions and 0 deletions
--- a/collects/lang/private/teachprims.ss
+++ b/collects/lang/private/teachprims.ss
@ -221,6 +221,7 @@ namespace.
  (lambda (x)
    (not (or (number? x)
             (boolean? x)
+             (empty? x)
             (pair? x)
             (symbol? x)
             (string? x)