* lib/pp.rb (PP.mcall): new method.

  (Struct#pretty_print): call Kernel#class and Struct#members even if
  overriden.
  (Struct#pretty_print_cycle): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 3 deletions

diff --git a/lib/pp.rb b/lib/pp.rb
index 62c98bd451..dc5856dab0 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -83,6 +83,12 @@ class PP < PrettyPrint
     out
   end
 
+  # :stopdoc:
+  def PP.mcall(obj, mod, meth, *args, &block)
+    mod.instance_method(meth).bind(obj).call(*args, &block)
+  end
+  # :startdoc:
+
   @sharing_detection = false
   class << self
     # Returns the sharing detection flag as a boolean value.
@@ -343,8 +349,8 @@ end
 
 class Struct
   def pretty_print(q)
-    q.group(1, '#<struct ' + self.class.name, '>') {
-      q.seplist(self.members, lambda { q.text "," }) {|member|
+    q.group(1, '#<struct ' + PP.mcall(self, Kernel, :class).name, '>') {
+      q.seplist(PP.mcall(self, Struct, :members), lambda { q.text "," }) {|member|
         q.breakable
         q.text member.to_s
         q.text '='
@@ -357,7 +363,7 @@ class Struct
   end
 
   def pretty_print_cycle(q)
-    q.text sprintf("#<struct %s:...>", self.class.name)
+    q.text sprintf("#<struct %s:...>", PP.mcall(self, Kernel, :class).name)
   end
 end
 
@@ -496,6 +502,12 @@ if __FILE__ == $0
     def test_list0123_11
       assert_equal("[0,\n 1,\n 2,\n 3]\n", PP.pp([0,1,2,3], '', 11))
     end
+
+    OverriddenStruct = Struct.new("OverriddenStruct", :members, :class)
+    def test_struct_override_members # [ruby-core:7865]
+      a = OverriddenStruct.new(1,2)
+      assert_equal("#<struct Struct::OverriddenStruct members=1, class=2>\n", PP.pp(a, ''))
+    end
   end
 
   class HasInspect