From: "nobu (Nobuyoshi Nakada) via ruby-core" Date: 2025-06-02T06:00:58+00:00 Subject: [ruby-core:122377] [Ruby Bug#21392] Data classes do not allow overriding #inspect Issue #21392 has been updated by nobu (Nobuyoshi Nakada). austin (Austin Ziegler) wrote in #note-3: > You are correct (and I should have known better; I have unit tests proving this). What unit tests? You can define `pretty_print` for IRB. ```ruby def pretty_print(q) q.text "CIELAB" q.breakable q.group 2, "[", "]" do q.text "%.4f%%" % l q.breakable q.text "%.4f" % a q.breakable q.text "%.4f" % b end end ``` ---------------------------------------- Bug #21392: Data classes do not allow overriding #inspect https://bugs.ruby-lang.org/issues/21392#change-113523 * Author: austin (Austin Ziegler) * Status: Assigned * Assignee: ima1zumi (Mari Imaizumi) * ruby -v: 3.4.4 * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- I'm preparing a new version of Color and I have decided to make all of the colour classes Data classes. However, it does not appear that `#inspect` can be overridden: ```ruby module Color CIELAB = Data.define(:l, :a, :b) do def inspect "CIELAB [%.4f%% %.4f %.4f]" % [l, a, b] end end end p Color::CIELAB[1,2,3] # Expected => CIELAB[1.000% 2.000 3.000] # Actual # ``` This feels like it should be permitted. -- 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/lists/ruby-core.ml.ruby-lang.org/