[ruby-core:121163] [Ruby master Misc#21154] Document or change Module#autoload?

Issue #21154 has been updated by mame (Yusuke Endoh).


I understood as follows: You want @matz to clarify the behavior around autoload under circular require patterns, but you never want to explain your motivation example.

I said in #21035 that at the last dev meeting, the decision was made not to discuss anything by using code examples in the circular require pattern.
You are requesting that we discuss the same agenda item again with little new material. Frankly, such a request would only waste the time of the dev meeting and is not productive.

I don't understand why you are so concerned about circular require patterns. This is just my imagination, but you, the author of the zeitwerk, cannot avoid the presence of circular require patterns in the user code?
If so, for example, does it help you by issuing a warning or error for autoloading that would result in a circular require pattern?

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Misc #21154: Document or change Module#autoload?
https://bugs.ruby-lang.org/issues/21154#change-112103

* Author: fxn (Xavier Noria)
* Status: Open
----------------------------------------
The documentation of `Module#autoload?` says

> Returns filename to be loaded if name is registered as autoload in the namespace of mod or one of its ancestors.

Cool, but in the following snippet

```ruby
autoload :Foo, 'foo'
autoload?(:Foo)
```

the second line could evaluate to `nil`, and this does not seem to agree. I just registered an autoload, therefore (according to the documentation) I should get "foo" back in line 2.

I'd like to ask for clarification from the Ruby team:

1. Is the documentation complete? Should that second line always return "foo"?
2. If the answer is no, which is the logic missing in the docs?

Thank you!



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