[ruby-core:99290] [Ruby master Feature#17043] Invokable module for custom Proc-like objects

[shyouhei@ruby-lang.org]

Issue #17043 has been updated by shyouhei (Shyouhei Urabe).

Status changed from Open to Feedback

While your library seems great, what is proposed in this ticket is not that obvious.  How can we help?  What can we do?

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Feature #17043: Invokable module for custom Proc-like objects 
https://bugs.ruby-lang.org/issues/17043#change-86679

* Author: delonnewman (Delon Newman)
* Status: Feedback
* Priority: Normal
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Ruby beautifully integrates Functional and Object-Oriented Programming, and there's more moving in the direction of supporting Functional Programming. A generalization of the Proc interface would enable users to integrate a functional approach into their classic OOP design patterns. One of the obvious examples would be "Command" objects.

Also, generic structures which Ruby as great support for. Hash now has `to_proc`.  But, it'd be great to be able to treat sets as predicate functions.

I've put together a prototype that I've found useful in my own work here: https://github.com/delonnewman/invokable.

It works like Enumerable, it can be included in any class that implements a `call` method. Then you get `to_proc`, `curry`, `<<` and `>>` for right and left composition, and `memoize`. More could be added. If you include `Invokable::Command` you can treat your "Command" object as an automatically curried function.




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