refactor: drop Boost.Utility dependency

CMakeLists.txt

@@ -25,7 +25,6 @@ target_link_libraries(boost_property_map
     Boost::smart_ptr
     Boost::throw_exception
     Boost::type_traits
-    Boost::utility
 )
 
 if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")

build.jam

@@ -17,8 +17,7 @@ constant boost_dependencies :
     /boost/smart_ptr//boost_smart_ptr
     /boost/throw_exception//boost_throw_exception
     /boost/type_index//boost_type_index
-    /boost/type_traits//boost_type_traits
-    /boost/utility//boost_utility ;
+    /boost/type_traits//boost_type_traits ;
 
 project /boost/property_map
     : common-requirements

doc/function_property_map.html

@@ -68,7 +68,7 @@ <H3>Template Parameters</H3>
 <TR>
 <TD><TT>Ref</TT></TD>
 <TD>The result type of the function.</TD>
-<TD><TT>boost::result_of&lt;const UnaryFunction(const Key&amp;)&gt;::type</TT></TD>
+<TD><TT>decltype(std::declval&lt;const UnaryFunction&gt;()(std::declval&lt;const Key&amp;&gt;()))</TT></TD>
 </TR>
 
 

doc/transform_value_property_map.html

@@ -68,7 +68,7 @@ <H3>Template Parameters</H3>
 <TR>
 <TD><TT>Ref</TT></TD>
 <TD>The result type of the function.</TD>
-<TD><TT>boost::result_of&lt;const UnaryFunction(property_traits&lt;PM&gt;::reference)&gt;::type</TT></TD>
+<TD><TT>decltype(std::declval&lt;const UnaryFunction&gt;()(std::declval&lt;property_traits&lt;PM&gt;::reference&gt;()))</TT></TD>
 </TR>
 
 

include/boost/property_map/function_property_map.hpp

@@ -3,6 +3,7 @@
 // Author: Philipp Moeller
 //
 // Copyright 2012, Philipp Moeller
+// Copyright 2026, Arnaud Becheler
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -16,13 +17,23 @@
 #include <boost/config.hpp>
 #include <boost/property_map/property_map.hpp>
 #include <boost/type_traits.hpp>
-#include <boost/utility/result_of.hpp>
 #include <type_traits>
 #include <utility>
 
 namespace boost {
 
-template<typename Func, typename Key, typename Ret = typename boost::result_of<const Func(const Key&)>::type>
+namespace detail {
+
+// MSVC in permissive mode cannot evaluate a bare decltype default template argument
+template <typename Func, typename Key>
+struct function_property_map_result
+{
+  using type = decltype(std::declval<const Func>()(std::declval<const Key&>()));
+};
+
+} // namespace detail
+
+template<typename Func, typename Key, typename Ret = typename detail::function_property_map_result<Func, Key>::type>
 class function_property_map: public put_get_helper<Ret, function_property_map<Func, Key, Ret> > {
   public:
   typedef Key key_type;

include/boost/property_map/transform_value_property_map.hpp

@@ -3,6 +3,7 @@
 // Author: Philipp Moeller
 //
 // Copyright 2012, Philipp Moeller
+// Copyright 2026, Arnaud Becheler
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -16,13 +17,23 @@
 #include <boost/config.hpp>
 #include <boost/property_map/property_map.hpp>
 #include <boost/type_traits.hpp>
-#include <boost/utility/result_of.hpp>
 #include <type_traits>
 #include <utility>
 
 namespace boost {
 
-template<typename Func, typename PM, typename Ret = typename boost::result_of<const Func(typename property_traits<PM>::reference)>::type>
+namespace detail {
+
+// MSVC in permissive mode cannot evaluate a bare decltype default template argument
+template <typename Func, typename PM>
+struct transform_value_property_map_result
+{
+  using type = decltype(std::declval<const Func>()(std::declval<typename property_traits<PM>::reference>()));
+};
+
+} // namespace detail
+
+template<typename Func, typename PM, typename Ret = typename detail::transform_value_property_map_result<Func, PM>::type>
 class transform_value_property_map: public put_get_helper<Ret, transform_value_property_map<Func, PM, Ret> > {
   public:
   typedef typename property_traits<PM>::key_type key_type;