Issue #19257 has been updated by nobu (Nobuyoshi Nakada). Status changed from Open to Feedback Always you can override methods defined in super classes. ```ruby class C end obj = C.new p obj.hash #=> an integer class C def hash = "foo" end p obj.hash #=> "foo" ``` No `#[]` method is a significant difference from `Struct`. ---------------------------------------- Bug #19257: Data that defines a member called hash https://bugs.ruby-lang.org/issues/19257#change-100795 * Author: solnic (Peter Solnica) * Status: Feedback * Priority: Normal * ruby -v: ruby 3.2.0 (2022-12-25 revision a528908271) [x86_64-darwin22] * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN ---------------------------------------- I believe this should raise an error given that `Data#hash` exists as a pre-defined core method and serves a very specific purpose: ``` ruby data = Data.define(:hash) obj = data.new(hash: "foo") obj.hash # => "foo" ``` An alternative would be to make `obj[:hash]` return the value of the member and `obj.hash` would return the hash of the object, but that could be confusing. -- https://bugs.ruby-lang.org/