From 3eeea6fa612efa9a3b2f620408915ea71336fe1a Mon Sep 17 00:00:00 2001
From: Wenzel Jakob <wenzel.jakob@epfl.ch>
Date: Thu, 30 Jun 2016 18:10:28 +0200
Subject: [PATCH] docs: point out limitations of implicit conversions

---
 docs/advanced.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/advanced.rst b/docs/advanced.rst
index 2067c893..c257fa2d 100644
--- a/docs/advanced.rst
+++ b/docs/advanced.rst
@@ -617,6 +617,11 @@ Python side:
 
     py::implicitly_convertible<A, B>();
 
+.. note::
+
+    Implicit conversions from ``A`` to ``B`` only work when ``B`` is a custom
+    data type that is exposed to Python via pybind11.
+
 .. _static_properties:
 
 Static properties