From: nobu.nakada@...
Date: 2001-12-19T13:38:34+09:00
Subject: [ruby-dev:15500] Re: define_method() does not properly set noex (PR#218)

なかだです。

At Wed, 19 Dec 2001 12:47:04 +0900 (JST),
pbranna@clemson.edu wrote:
> If I write this:
> 
>   class Foo
>   private
>     define_method :foo, proc { }
>     def bar; end
>   end
> 
>   f = Foo.new
>   f.foo
>   f.bar
> 
> Then I get this (Ruby 1.6.5):
> 
>   defmeth.rb:9: private method `bar' called for #<Foo:0x4026f8d8> (NameError)
> 
> However, I would expect to get this:
> 
>   defmeth.rb:8: private method `foo' called for #<Foo:0x4026f8d8> (NameError)
> 
> The problem seems to be in rb_mod_define_method:
> 
>     if (RDATA(body)->dmark == (RUBY_DATA_FUNC)bm_mark) {
>         rb_add_method(mod, id, NEW_DMETHOD(method_unbind(body)), NOEX_PUBLIC);
>     }
>     else if (RDATA(body)->dmark == (RUBY_DATA_FUNC)blk_mark) {
>         rb_add_method(mod, id, NEW_BMETHOD(body), NOEX_PUBLIC);
>     }
> 
> Ruby should check scope_vmode and set the noex argument based on that.

で、こんなのを考えたんですが、SCOPE_MODFUNCのときってクラスメソッ
ドも定義するほうがいいんでしょうか。



Index: eval.c
===================================================================
RCS file: /cvs/ruby/src/ruby/eval.c,v
retrieving revision 1.235
diff -u -2 -p -r1.235 eval.c
--- eval.c	2001/12/18 08:46:56	1.235
+++ eval.c	2001/12/19 04:07:20
@@ -6941,4 +6941,6 @@ rb_mod_define_method(argc, argv, mod)
     ID id;
     VALUE body;
+    NODE *node;
+    int mode;
 
     if (argc == 1) {
@@ -6958,8 +6960,8 @@ rb_mod_define_method(argc, argv, mod)
     }
     if (RDATA(body)->dmark == (RUBY_DATA_FUNC)bm_mark) {
-	rb_add_method(mod, id, NEW_DMETHOD(method_unbind(body)), NOEX_PUBLIC);
+	node = NEW_DMETHOD(method_unbind(body));
     }
     else if (RDATA(body)->dmark == (RUBY_DATA_FUNC)blk_mark) {
-	rb_add_method(mod, id, NEW_BMETHOD(body), NOEX_PUBLIC);
+	node = NEW_BMETHOD(body);
     }
     else {
@@ -6967,4 +6969,18 @@ rb_mod_define_method(argc, argv, mod)
 	rb_raise(rb_eTypeError, "wrong argument type (expected Proc)");
     }
+
+    switch (scope_vmode & SCOPE_MASK) {
+      case SCOPE_PRIVATE:
+      case SCOPE_MODFUNC:
+	mode = NOEX_PRIVATE;
+	break;
+      case SCOPE_PROTECTED:
+	mode = NOEX_PROTECTED;
+	break;
+      default:
+	mode = NOEX_PUBLIC;
+	break;
+    }
+    rb_add_method(mod, id, node, mode);
 
     rb_clear_cache_by_id(id);


-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦