Feature #10169: It might be better to make Mathn class deprecated

• Status: Closed
• Priority: Normal
• Assignee: hsbt (Hiroshi SHIBATA)
• Target version: 2.5

[gogotanaka (Kazuki Tanaka)]

#English

As I mentioned in https://bugs.ruby-lang.org/issues/10086#change-48156,

1. Now that we are able to hundle complex exponents without mathn.

2. And overriding \ with quo has too much side effect. I suppose we should not implement such a thing in ruby standard library.

3. Requiring and integrating other standard libraries doesn't make sense.

This is why I think it might be better to make Mathn class deprecated and disabled in the future.

#日本語（すみませんまだ英語が拙く、意図をより正確にお伝えするため日本語も記載させて頂きます）

僕がこちらのissueで述べさせて頂いた通り、https://bugs.ruby-lang.org/issues/10086#change-48156

1. mathn で実装されている冪乗演算は mathn を用いずとも現在は実現されている事

2. mathn 内で行われている \ を quo でオーバーライドする事は副作用が強く、またこの種のオーバーライドが必要な場面は多くなく、必要な場合でも自ら実装する事が多いと推測される事

3. 各種数学関連のモジュールをrequireする機能もあまり意味を持たない事

以上の理由より、とりわけRubyの標準ライブラリーで現在のmathn を提供する必要を感じません.

よってmathnを非推奨に、ゆくゆくは廃止してしまうのが良いと考えています.

[matz (Yukihiro Matsumoto)]

Approved. Organize transition path.

Matz.

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

Applied in changeset r47282.

---

• lib/mathn.rb: mathn library is deprecated on ruby 2.2.
  [Feature #10169][ruby-core:64553]

[hsbt (Hiroshi SHIBATA)]

• Status changed from Closed to Open

[hsbt (Hiroshi SHIBATA)]

• Related to Bug #2121: mathn/rational destroys Fixnum#/, Fixnum#quo and Bignum#/, Bignum#quo added

[gogotanaka (Kazuki Tanaka)]

@hiroshi (Hiroshi MORIYAMA) SHIBATA

I really appreciate you doing what I should do.

[gogotanaka (Kazuki Tanaka)]

It might be annoying question, it's still open?
If so, please let me know why, otherwise could you make it closed?
I just wanna make sure my tickets remains or not.

I'm sorry to your extra trouble : (

[hsbt (Hiroshi SHIBATA)]

• Related to Feature #13335: Gemify mathn added

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned
• Assignee set to hsbt (Hiroshi SHIBATA)
• Target version set to 2.5

[hsbt (Hiroshi SHIBATA)]

• Related to Feature #13334: Removed deprecated mathn extentions. added

[hsbt (Hiroshi SHIBATA)]

Note: We need to remove Math mode from irb before unbundling mathn. So it uses mathn library.

After that, We can remove mathn from ruby core. and ship rubygems.

I will do it.

[hsbt (Hiroshi SHIBATA)]

• Status changed from Assigned to Closed

Applied in changeset trunk|r58432.

---

Removed mathn.rb from stdlib. It's deprecated from Ruby 2.2.

[Feature #10169][[ruby-core:64553]]