From: David Vázquez <davazp@gmail.com>
Date: Sun, 1 Dec 2013 19:41:09 +0000 (+0000)
Subject: `make-package' signals error if package exists
X-Git-Url: http://repo.macrolet.net/gitweb/?a=commitdiff_plain;h=64e5f06b85a5f3add27da0136076a41c5924d6ce;hp=65db4c7e8728d7200e55bd6c3f1ff1a83e005c46;p=jscl.git

`make-package' signals error if package exists
---

diff --git a/src/package.lisp b/src/package.lisp
index 7449f84..6fd379b 100644
--- a/src/package.lisp
+++ b/src/package.lisp
@@ -26,7 +26,9 @@
     (setf (oget package "symbols") (new))
     (setf (oget package "exports") (new))
     (setf (oget package "use") use)
-    (push package *package-list*)
+    (if (find name *package-list* :key (lambda (s) (oget s "packageName")) :test #'equal)
+        (error "A package namded `~a' already exists." name)
+        (push package *package-list*))
     package))
 
 (defun resolve-package-list (packages)