defect macro for C++14 feature std::exchange()

include/boost/config/stdlib/dinkumware.hpp

@@ -157,6 +157,11 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#if !defined(_CPPLIB_VER) || (_CPPLIB_VER < 650)
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+#endif
+
 // C++17 features
 #if !defined(_CPPLIB_VER) || (_CPPLIB_VER < 650)
 #  define BOOST_NO_CXX17_STD_APPLY

include/boost/config/stdlib/libcomo.hpp

@@ -72,6 +72,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/libcpp.hpp

@@ -79,6 +79,11 @@
 #define BOOST_NO_STD_MESSAGES
 #endif
 
+// C++14 features
+#if (_LIBCPP_VERSION < 3700) || (__cplusplus <= 201402L)
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+#endif
+
 // C++17 features
 #if (_LIBCPP_VERSION < 3700) || (__cplusplus <= 201402L)
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/libstdcpp3.hpp

@@ -239,6 +239,7 @@
 // Although <regex> is present and compilable against, the actual implementation is not functional
 // even for the simplest patterns such as "\d" or "[0-9]". This is the case at least in gcc up to 4.8, inclusively.
 #  define BOOST_NO_CXX11_HDR_REGEX
+#  define BOOST_NO_CXX14_STD_EXCHANGE
 #endif
 
 #if defined(__clang_major__) && ((__clang_major__ < 3) || ((__clang_major__ == 3) && (__clang_minor__ < 7)))

include/boost/config/stdlib/modena.hpp

@@ -61,6 +61,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/msl.hpp

@@ -85,6 +85,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/roguewave.hpp

@@ -197,6 +197,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/sgi.hpp

@@ -155,6 +155,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/stlport.hpp

@@ -245,6 +245,9 @@ namespace boost { using std::min; using std::max; }
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE

include/boost/config/stdlib/vacpp.hpp

@@ -61,6 +61,9 @@
 #  define BOOST_NO_CXX14_HDR_SHARED_MUTEX
 #endif
 
+// C++14 features
+#  define BOOST_NO_CXX14_STD_EXCHANGE
+
 // C++17 features
 #  define BOOST_NO_CXX17_STD_APPLY
 #  define BOOST_NO_CXX17_STD_INVOKE