From: merch-redmine@... Date: 2020-07-02T16:21:53+00:00 Subject: [ruby-core:99032] [Ruby master Feature#17004] Provide a way for methods to omit their return value Issue #17004 has been updated by jeremyevans0 (Jeremy Evans). soulcutter (Bradley Schaefer) wrote in #note-15: > Also, how would you test this behavior? ```ruby # return value not discarded case some_method.must_equal :expected_return_value check_for.must_equal :some_side_effect # return value discarded case some_method check_for.must_equal :some_side_effect ``` ---------------------------------------- Feature #17004: Provide a way for methods to omit their return value https://bugs.ruby-lang.org/issues/17004#change-86407 * Author: shyouhei (Shyouhei Urabe) * Status: Open * Priority: Normal ---------------------------------------- In ruby, it often is the case for a method's return value to not be used by its caller. Even when a method returns something meaningful, its caller is free to ignore it. Why not provide a way for a method to know if its return value is needed or not? That adds a room for methods to be optimized, by for instance skipping creation of complex return values. The following pull request implements `RubyVM.return_value_is_used?` method, which does that: https://github.com/ruby/ruby/pull/3271 -- https://bugs.ruby-lang.org/ Unsubscribe: