From: daniel@...42.com Date: 2020-01-02T23:08:32+00:00 Subject: [ruby-core:96637] [Ruby master Bug#16473] New deprecated warning disallows keyword arguments bypassing Issue #16473 has been updated by Dan0042 (Daniel DeLorme). In this particular case there would be a bug if `*args` had more than one element, so I think the cleaner fix would be ```ruby def non_kw(a = {}, b = {}) puts "non kw #{a}" kw **b end ``` I really think the `ruby2_keywords` workaround should be strictly reserved for cases where portability and generic delegation _require_ it. ---------------------------------------- Bug #16473: New deprecated warning disallows keyword arguments bypassing https://bugs.ruby-lang.org/issues/16473#change-83606 * Author: puchuu (Andrew Aladjev) * Status: Rejected * Priority: Normal * Assignee: * Target version: * ruby -v: 2.7.0 * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- Hello. I see that ruby 2.7.0 prints unnecessary deprecated warning during arguments bypassing. ```ruby def kw(a: 1) puts "kw #{a}" end def non_kw(a = {}, *args) puts "non kw #{a}" kw *args end non_kw({ :a => 2 }, :a => 2) non_kw({ :a => 3 }) non_kw ``` The right output is: ``` non kw {:a=>2} kw 2 non kw {:a=>3} kw 1 non kw {} kw 1 ``` Ruby 2.7.0 provides deprecated warning: ```ruby warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call ``` `*args` is bypassing arguments without any conversion. It looks like ruby converts last hash to keywords and than converts it back to hash. I think it is a bug. -- https://bugs.ruby-lang.org/ Unsubscribe: