* array.c, dir.c, enum.c, hash.c, io.c, range.c, string.c, struct.c:

  let enumerable methods return Enumerator.  [ruby-dev:26924]

* intern.h (RETURN_ENUMERATOR): utility macro for enumerable methods.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9053 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/intern.h b/intern.h
index 338eacd039..70e243629d 100644
--- a/intern.h
+++ b/intern.h
@@ -143,6 +143,11 @@ NORETURN(void rb_cmperr _((VALUE, VALUE)));
 /* enum.c */
 /* enumerator.c */
 VALUE rb_enumeratorize _((VALUE, VALUE, int, VALUE *));
+#define RETURN_ENUMERATOR(obj, argc, argv) do {				\
+	if (!rb_block_given_p())					\
+	    return rb_enumeratorize(obj, ID2SYM(rb_frame_this_func()),	\
+				    argc, argv);			\
+    } while (0)
 /* error.c */
 RUBY_EXTERN int ruby_nerrs;
 VALUE rb_exc_new _((VALUE, const char*, long));