Replace use of boost/iterator/detail/enable_if.hpp

doc/numpy/_static/boost.css

@@ -714,3 +714,23 @@ span.purple { color: purple; }
 span.gold { color: gold; }
 span.silver { color: silver; } /* lighter gray */
 span.gray { color: #808080; } /* light gray */
+
+/* 2022 fix */
+
+ol.simple ol p,
+ol.simple ul p,
+ul.simple ol p,
+ul.simple ul p {
+    margin-top: 0;
+}
+
+ol.simple > li:not(:first-child) > p,
+ul.simple > li:not(:first-child) > p {
+    margin-top: 0;
+}
+
+ol.simple p,
+ul.simple p {
+    margin-bottom: 0;
+}
+

doc/numpy/_templates/layout.html

@@ -49,6 +49,9 @@
     {%- for scriptfile in script_files %}
     <script type="text/javascript" src="{{ pathto(scriptfile, 1) }}"></script>
     {%- endfor %}
+    <script data-url_root="{{ pathto('', 1) }}" id="documentation_options" src="{{ pathto('', 1) }}_static/documentation_options.js"></script>
+    <script src="{{ pathto('', 1) }}_static/searchtools.js"></script>
+    <script src="{{ pathto('', 1) }}_static/language_data.js"></script>
     {%- if use_opensearch %}
     <link rel="search" type="application/opensearchdescription+xml"
           title="{% trans docstitle=docstitle|e %}Search within {{ docstitle }}{% endtrans %}"

include/boost/python/object_operators.hpp

@@ -9,7 +9,7 @@
 
 # include <boost/python/object_core.hpp>
 # include <boost/python/call.hpp>
-# include <boost/iterator/detail/enable_if.hpp>
+# include <boost/type_traits/enable_if.hpp>
 # include <boost/mpl/bool.hpp>
 
 # include <boost/iterator/detail/config_def.hpp>
@@ -40,7 +40,7 @@ struct is_object_operators
 # if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
 template <class L, class R, class T>
 struct enable_binary
-  : boost::iterators::enable_if<is_object_operators<L,R>, T>
+  : boost::enable_if_<is_object_operators<L,R>::value, T>
 {};
 #  define BOOST_PYTHON_BINARY_RETURN(T) typename enable_binary<L,R,T>::type
 # else