Concurrent::Map#each behaves differently in MRI and JRuby

[ivoanjo]

• Operating system: linux
• concurrent-ruby version: 1.0.5 and master (tried both)
• concurrent-ruby-ext installed: no
• concurrent-ruby-edge used: no

Description:

Concurrent::Map#each when called without a block returns an enumerator on MRI but self on JRuby.

Testcase:

require 'concurrent'
puts "#{RUBY_ENGINE}: #{Concurrent::Map.new.each.inspect}"

Output in MRI 2.4.1:

ruby: #<Enumerator: #<Concurrent::Map:0x0055dd74e2dcc0 entries=0 default_proc=nil>:each_pair>

Output in JRuby 9.1.8.0:

jruby: #<Concurrent::Map:0x00000000000fa0 entries=0 default_proc=nil>

[pitr-ch]

@ivoanjo Thanks for reporting! It should indeed behave the same. Would you have time to contribute a PR with a fix?

[ivoanjo]

Yes, I think I can take a stab at it today :)

[pitr-ch]

Great!