Bug #6053: Enumerator#rewind goes to beginning instead of decrementing one step.

• Status: Closed
• Priority: Normal
• Assignee: -
• Target version: 1.9.3
• ruby -v: ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.3.0]

[tyre77 (Chris Maddox)]

From the ruby docs:
rewind → e
Rewinds the enumeration sequence by one step.

In practice, however, it fully rewinds (either change documentation or have it do what it says. Going back one step is nice though):
irb(main):001:0> a = [1,2,3,4]
=> [1, 2, 3, 4]
irb(main):002:0> b = a.to_enum
=> #<Enumerator: [1, 2, 3, 4]:each>
irb(main):007:0> b.next
=> 1
irb(main):008:0> b.next
=> 2
irb(main):009:0> b.next
=> 3
irb(main):010:0> b.rewind
=> #<Enumerator: [1, 2, 3, 4]:each>
irb(main):011:0> b.next
=> 1

[matz (Yukihiro Matsumoto)]

It is a bug in documentation. #rewind method rewinds the sequence to the beginning.

[matz (Yukihiro Matsumoto)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r34712.
Chris, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• enumerator.c (enumerator_rewind): update the documentation.
  fixed: #6053