* lib/pp.rb (PP::PPMethods#guard_inspect_key): support

__recursive_key__.  [ruby-dev:25821]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8132 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Mar  9 23:55:34 2005  Tanaka Akira  <akr@m17n.org>
+
+	* lib/pp.rb (PP::PPMethods#guard_inspect_key): support
+	  __recursive_key__.  [ruby-dev:25821]
+
 Wed Mar  9 19:42:21 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
 
 	* ext/openssl/ossl_ssl.c: OpenSSL::SSL::SSLContexts suports callbacks:

lib/pp.rb

@@ -91,31 +91,35 @@ class PP < PrettyPrint
   end
 
   module PPMethods
-    InspectKey = :__inspect_key__
-
     def guard_inspect_key
-      if Thread.current[InspectKey] == nil
-        Thread.current[InspectKey] = {inspect: []}
+      if Thread.current[:__recursive_key__] == nil
+        Thread.current[:__recursive_key__] = {}
       end
 
-      save = Thread.current[InspectKey][:inspect]
+      if Thread.current[:__recursive_key__][:inspect] == nil
+        Thread.current[:__recursive_key__][:inspect] = []
+      end
+
+      save = Thread.current[:__recursive_key__][:inspect]
 
       begin
-        Thread.current[InspectKey][:inspect] = []
+        Thread.current[:__recursive_key__][:inspect] = []
         yield
       ensure
-        Thread.current[InspectKey][:inspect] = save
+        Thread.current[:__recursive_key__][:inspect] = save
       end
     end
 
     def check_inspect_key(id)
-      Thread.current[InspectKey][:inspect].include?(id)
+      Thread.current[:__recursive_key__] &&
+      Thread.current[:__recursive_key__][:inspect] &&
+      Thread.current[:__recursive_key__][:inspect].include?(id)
     end
     def push_inspect_key(id)
-      Thread.current[InspectKey][:inspect] << id
+      Thread.current[:__recursive_key__][:inspect] << id
     end
     def pop_inspect_key
-      Thread.current[InspectKey][:inspect].pop
+      Thread.current[:__recursive_key__][:inspect].pop
     end
 
     # Adds +obj+ to the pretty printing buffer