From: Yusuke ENDOH <mame@...>
Date: 2009-11-24T22:41:41+09:00
Subject: [ruby-dev:39767] [Bug:trunk] cannot call public'ed method via public_method

遠藤です。

継承先のクラスで public にしたメソッドを public_method で取り出して
呼び出すと undefined private method と言われてしまいます。


  class C
    def foo; "FOO"; end
    private :foo
  end
  class D < C
    public :foo
  end
  p D.new.public_method(:foo).call
    #=> undefined private method `foo' for class `D' (NameError)


これは呼び出せるのが正解ということでいいでしょうか。

Index: proc.c
===================================================================
--- proc.c	(revision 25895)
+++ proc.c	(working copy)
@@ -894,6 +894,7 @@
     struct METHOD *data;
     rb_method_entry_t *me, meb;
     rb_method_definition_t *def = 0;
+    rb_method_flag_t flag = NOEX_UNDEF;

   again:
     me = rb_method_entry(klass, id);
@@ -921,8 +922,11 @@
 	rb_print_undef(klass, id, 0);
     }
     def = me->def;
-    if (scope && (me->flag & NOEX_MASK) != NOEX_PUBLIC) {
-	rb_print_undef(rclass, def->original_id, (int)(me->flag & NOEX_MASK));
+    if (flag == NOEX_UNDEF) {
+	flag = me->flag;
+	if (scope && (flag & NOEX_MASK) != NOEX_PUBLIC) {
+	    rb_print_undef(rclass, def->original_id, (int)(flag & NOEX_MASK));
+	}
     }
     if (def && def->type == VM_METHOD_TYPE_ZSUPER) {
 	klass = RCLASS_SUPER(me->klass);

-- 
Yusuke ENDOH <mame@tsg.ne.jp>