* lib/pp.rb (PP:ObjectMixin#pretty_print): delegates has no inspect

  method.  [ruby-core:25804]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 2 deletions

diff --git a/lib/pp.rb b/lib/pp.rb
index a71ce9db38..2804ecd117 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -283,9 +283,23 @@ class PP < PrettyPrint
     # This module provides predefined #pretty_print methods for some of
     # the most commonly used built-in classes for convenience.
     def pretty_print(q)
-      if /\(Kernel\)#/ !~ Object.instance_method(:method).bind(self).call(:inspect).inspect
+      method_method = Object.instance_method(:method).bind(self)
+      begin
+        inspect_method = method_method.call(:inspect)
+      rescue NameError
+      end
+      begin
+        to_s_method = method_method.call(:to_s)
+      rescue NameError
+      end
+      if inspect_method && /\(Kernel\)#/ !~ inspect_method.inspect
+        q.text self.inspect
+      elsif !inspect_method && self.respond_to?(:inspect)
         q.text self.inspect
-      elsif /\(Kernel\)#/ !~ Object.instance_method(:method).bind(self).call(:to_s).inspect && instance_variables.empty?
+      elsif to_s_method && /\(Kernel\)#/ !~ to_s_method.inspect &&
+            instance_variables.empty?
+        q.text self.to_s
+      elsif !to_s_method && self.respond_to?(:to_s)
         q.text self.to_s
       else
         q.pp_object(self)