* enumerator.c: Use to_enum for Enumerable methods returning Enumerators.

  This makes Lazy#cycle no longer needed, so it was removed.
  Make Enumerator#chunk and slice_before return lazy Enumerators.
  [Bug #7715]

* internal.h: Remove ref to rb_enum_cycle_size; no longer needed

* enum.c: Make enum_cycle_size static.

* test/ruby/test_lazy_enumerator.rb: Test for above

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39058 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 16 insertions, 0 deletions

diff --git a/test/ruby/test_lazy_enumerator.rb b/test/ruby/test_lazy_enumerator.rb
index 8e0fd50f55..c78a2d66cc 100644
--- a/test/ruby/test_lazy_enumerator.rb
+++ b/test/ruby/test_lazy_enumerator.rb
@@ -447,4 +447,20 @@ EOS
       assert_raise(ArgumentError){ [].lazy.send(method) }
     end
   end
+
+  def test_laziness_conservation
+    bug7507 = '[ruby-core:51510]'
+    {
+      slice_before: //,
+      with_index: nil,
+      cycle: nil,
+      each_with_object: 42,
+      each_slice: 42,
+      each_entry: nil,
+      each_cons: 42,
+    }.each do |method, arg|
+      assert_equal Enumerator::Lazy, [].lazy.send(method, *arg).class, bug7507
+    end
+    assert_equal Enumerator::Lazy, [].lazy.chunk{}.class, bug7507
+  end
 end