1 files changed, 11 insertions, 1 deletions
diff --git a/Doc/library/enum.rst b/Doc/library/enum.rst
index 8a02a55ed2..b3691ca4ea 100644
--- a/Doc/library/enum.rst
+++ b/Doc/library/enum.rst
@@ -558,7 +558,8 @@ Some rules:
 4. %-style formatting:  `%s` and `%r` call the :class:`Enum` class's
    :meth:`__str__` and :meth:`__repr__` respectively; other codes (such as
    `%i` or `%h` for IntEnum) treat the enum member as its mixed-in type.
-5. :meth:`str.format` (or :func:`format`) will use the mixed-in
+5. :ref:`Formatted string literals <f-strings>`, :meth:`str.format`,
+   and :func:`format` will use the mixed-in
    type's :meth:`__format__`.  If the :class:`Enum` class's :func:`str` or
    :func:`repr` is desired, use the `!s` or `!r` format codes.
 
@@ -747,6 +748,15 @@ besides the :class:`Enum` member you looking for::
 
 .. versionchanged:: 3.5
 
+Boolean evaluation: Enum classes that are mixed with non-Enum types (such as
+:class:`int`, :class:`str`, etc.) are evaluated according to the mixed-in
+type's rules; otherwise, all members evaluate as ``True``.  To make your own
+Enum's boolean evaluation depend on the member's value add the following to
+your class::
+
+    def __bool__(self):
+        return bool(self.value)
+
 The :attr:`__members__` attribute is only available on the class.
 
 If you give your :class:`Enum` subclass extra methods, like the `Planet`_