[ruby-dev:19902] Re: Proc#call parameter assignment

なひです。

> From: "Yukihiro Matsumoto" <[e-mail]>
> Sent: Tuesday, March 25, 2003 1:09 PM

> そうすると
>
> Wed Mar 12 11:23:49 2003  Yukihiro Matsumoto  <[e-mail]>
>
> * eval.c (avalue_to_svalue): avalue_to_svalue([[1,2]]) should be
>   [[1,2]], not [1,2] to wrap-around.
>
> が怪しいですね。ただ、問題が起きる時の状態(渡した値と受け取
> る左辺値)が特定できないと直せないですねえ。

こんなのは役に立ちます？

$ cat toc.rhtml  # RWikiの中で呼ばれるerbテンプレート
<div class="toc">
<p>Table of contents:</p>
<%
if (!pg.headlines.empty? and !pg.headlines[0].children.empty?)

  # 関係あるのはここから↓

  f = lambda { |var2|
    raise if var2[0].class == Array
  }
  var1 = pg.headlines[0].children
  f.call(var1)

  # ここまで↑

%>
<%= dumpTree.call(pg.headlines[0].children) %>
<%
end
%>
<p><a href="#link">Link</a></p>
</div>

$ ruby18 -rrd2rwiki-lib -rdebug -d rwiki.rb
Debug.rb
Emacs support available.

rwiki.rb:11:$KCODE = 'EUC'
(rdb:1) cont
"Started."  # ここでdruby経由でRWikiをキックし、↑のコードを走らせる。
Exception `RuntimeError' at toc.rhtml:6 -
toc.rhtml:6: `' (RuntimeError)
        from /usr/local/lib/ruby/site_ruby/1.8/drb/drb.rb:596:in `start'
        from /usr/local/lib/ruby/site_ruby/1.8/drb/drb.rb:596:in `run'
        from /usr/local/lib/ruby/site_ruby/1.8/drb/drb.rb:549:in `initialize'
        from /usr/local/lib/ruby/site_ruby/1.8/drb/drb.rb:713:in `new'
        from /usr/local/lib/ruby/site_ruby/1.8/drb/drb.rb:713:in `start_service'
        from rwiki.rb:751
toc.rhtml:6:
(rdb:3) p var1
[#<RD::RD2RWikiVisitor::HeadlineFrame level=2, title="What is this?", anchor="What.20is.20this.3f", children=[]>,
#<RD::RD2RWikiVisitor::HeadlineFrame level=2, title="How should I do to make a new page?",
anchor="How.20should.20I.20do.20to.20make.20a.20new.20page.3f", children=[]>, #<RD::RD2RWikiVisitor::HeadlineFrame level=2,
title="Do when someone erases my comment?", anchor="Do.20when.20someone.20erases.20my.20comment.3f", children=[]>]
(rdb:3) p var1.__id__
136576808   # ★
(rdb:3) p var1.class
Array
(rdb:3) p var1[0].class
RD::RD2RWikiVisitor::HeadlineFrame
(rdb:3) p var1[0].class.ancestors
[RD::RD2RWikiVisitor::HeadlineFrame, Struct, Enumerable, Object, PP::ObjectMixin, Kernel]
(rdb:3) p var2
[[#<RD::RD2RWikiVisitor::HeadlineFrame level=2, title="What is this?", anchor="What.20is.20this.3f", children=[]>,
#<RD::RD2RWikiVisitor::HeadlineFrame level=2, title="How should I do to make a new page?",
anchor="How.20should.20I.20do.20to.20make.20a.20new.20page.3f", children=[]>, #<RD::RD2RWikiVisitor::HeadlineFrame level=2,
title="Do when someone erases my comment?", anchor="Do.20when.20someone.20erases.20my.20comment.3f", children=[]>]]
(rdb:3) p var2.__id__
136387532   # ★と違う
(rdb:3) p var2.class
Array
(rdb:3) p var2[0].class
Array       # ArrayのArray?
(rdb:3) p var2[0].__id__
136576808   # ★と一緒
(rdb:3)