From: "fxn (Xavier Noria) via ruby-core" Date: 2023-06-21T23:26:26+00:00 Subject: [ruby-core:113985] [Ruby master Feature#19742] Introduce `Module#anonymous?` Issue #19742 has been updated by fxn (Xavier Noria). The documentation for `Module#name` says: > Returns the name of the module mod. Returns nil for anonymous modules. So, _if_ the module is anonymous, _then_ the name is `nil`. Logically, that does not rule out as a possibility that a non-anonymous module may also have a `nil` name, but I believe you take that for granted. If you are not anonymous, you have a name (ie, a value that is not `nil`), that is the common meaning of something not being anonymous. ---------------------------------------- Feature #19742: Introduce `Module#anonymous?` https://bugs.ruby-lang.org/issues/19742#change-103643 * Author: ioquatix (Samuel Williams) * Status: Open * Priority: Normal ---------------------------------------- As a follow-on , I'd like propose we introduce `Module#anonymous?`. In some situations, like logging/formatting, serialisation/deserialization, debugging or meta-programming, we might like to know if a class is a proper constant or not. However, this brings about some other issues which might need to be discussed. After assigning a constant, then removing it, the internal state of Ruby still believes that the class name is permanent, even thought it's no longer true. e.g. ``` m = Module.new m.anonymous? # true M = m m.anonyomous # false Object.send(:remove_const, :M) M # uninitialized constant M (NameError) m.anonymous? # false ``` Because RCLASS data structure is not updated after the constant is removed, internally the state still has a "permanent class name". I want to use this proposal to discuss this issue and whether there is anything we should do about such behaviour (or even if it's desirable). Proposed PR: https://github.com/ruby/ruby/pull/7966 cc @fxn -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/