Add isNegative() to the Type\NumberInterface

docs/reference/references.rst

@@ -1,25 +0,0 @@
-.. _reference.references:
-
-==========
-References
-==========
-
-.. [DCE11SEC] Open Group. (1997). *DCE 1.1: Authentication and Security Services*
-    (Document No. C311). Retrieved from https://publications.opengroup.org/c311
-
-.. [RFC4122] Leach, P., Mealling, M., & Salz, R. (2005, July). A universally
-    unique identifier (UUID) URN namespace. *Internet Requests for Comments*
-    (RFC 4122). RFC Editor. Retrieved from https://www.rfc-editor.org/rfc/rfc4122.html
-
-.. [UUIDV6] Peabody, B. (2020, February 24). UUID format update. *Internet
-    Drafts* (draft-peabody-dispatch-new-uuid-format-00). Working Draft, IETF
-    Secretariat. Retrieved from
-    https://tools.ietf.org/html/draft-peabody-dispatch-new-uuid-format-00
-
-.. [RFC1321] Rivest, R. (1992, April). The MD5 message-digest algorithm.
-    *Internet Requests for Comments* (RFC 1321). RFC Editor. Retrieved from
-    https://www.rfc-editor.org/rfc/rfc1321.html
-
-.. [SHA1] U.S. Department of Commerce, National Institute of Standards and
-    Technology. (2015). *Secure Hash Standard (SHS)* (FIPS PUB 180-4). Retrieved
-    from http://dx.doi.org/10.6028/NIST.FIPS.180-4

docs/reference/types.rst

@@ -26,6 +26,11 @@ Types
 
     NumberInterface ensures consistency in numeric values returned by ramsey/uuid.
 
+    .. php:method:: isNegative()
+
+        :returns: True if this number is less than zero, false otherwise.
+        :returntype: ``bool``
+
 .. php:class:: Decimal
 
     Implements :php:interface:`Ramsey\\Uuid\\Type\\NumberInterface`.