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Issue #7148 has been updated by Yukihiro Matsumoto.
It's OK for me to implement Tempfile without using DelegateClass. If JRuby does similar thing already, it might be a good idea to share implementation. Besides that, we might need to think about killing/redefining some unnecessary/invalid methods of File class, e.g. reopen. I am afraid dup is one of them.
Matz.
----------------------------------------
Feature #7148: Improved Tempfile w/o DelegateClass
https://bugs.ruby-lang.org/issues/7148#change-52847
* Author: Masaki Matsushita
* Status: Assigned
* Priority: Low
* Assignee: Yukihiro Matsumoto
----------------------------------------
I propose improved `Tempfile` without `DelegateClass()`.
Present `Tempfile` has following problems.
1. confusing inspect
~~~ruby
t = Tempfile.new("foo") #=> #<File:/tmp/foo20121012-6762-12w11to>
t.is_a? File #=> false
~~~
2. `#dup` doesn't duplicate `IO`
~~~ruby
t = Tempfile.new("foo")
t.dup.close
t.read #=> IOError: closed stream
~~~
3. finalizer performs unlink even when it has been duplicated
~~~ruby
t = Tempfile.new("foo")
path = t.path #=> "/tmp/foo20121012-7533-1q537gq"
File.exist? path #=> true
tt = t.dup
t = nil
GC.start
File.exist? path #=> false
~~~
I think these problems caused by using `DelegateClass()`.
Therefore, I made a patch to resolve the problems.
The patched Tempfile class is a subclass of File.
---Files--------------------------------
patch.diff (3.52 KB)
--
https://bugs.ruby-lang.org/