Allow IO#reopen to take a block

* io.c (rb_io_reopen): take a block and ensure the IO closed
  [Feature #2631]

* test/ruby/test_io.rb: add a test

* NEWS: add an entry for this change

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59142 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/io.c b/io.c
index 3482602326..8b0064b2dc 100644
--- a/io.c
+++ b/io.c
@@ -7058,6 +7058,10 @@ rb_io_reopen(int argc, VALUE *argv, VALUE file)
 	}
     }
 
+    if (rb_block_given_p()) {
+	return rb_ensure(rb_yield, file, io_close, file);
+    }
+
     return file;
 }