Fix metadata on functions.

- Don't use metadata to store ast, env, params data.
- In Clojure, store metadata on the :meta key of the real metadata.
  This also allows using any datatype as metadata.

1 files changed, 1 insertions, 1 deletions

diff --git a/ps/core.ps b/ps/core.ps
index 35f2b19..afda426 100644
--- a/ps/core.ps
+++ b/ps/core.ps
@@ -172,7 +172,7 @@ end } def
 
 % [obj] -> meta -> meta
 /meta {
-    0 _nth /meta get
+    0 _nth dup /meta known { /meta get }{ null } ifelse
 } def