diff --git a/appveyor.yml b/appveyor.yml
index 689fdd8..b1c14b2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -38,9 +38,9 @@ environment:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       ARGS: --toolset=msvc-14.1 address-model=64 cxxflags=-std:c++latest
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ARGS: --toolset=msvc-14.1 address-model=64 cxxflags=-clr asynch-exceptions=on
+      ARGS: --toolset=msvc-14.1 cxxstd=17 address-model=64 cxxflags=-clr asynch-exceptions=on
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      ARGS: --toolset=msvc-14.1 address-model=32 cxxflags=-clr asynch-exceptions=on
+      ARGS: --toolset=msvc-14.1 cxxstd=17 address-model=32 cxxflags=-clr asynch-exceptions=on
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       ARGS: --toolset=msvc-14.1 architecture=arm testing.execute=off
       DISABLE_CONFIG_INFO: "YES"
diff --git a/include/boost/type_traits/detail/is_function_cxx_11.hpp b/include/boost/type_traits/detail/is_function_cxx_11.hpp
index d175e40..4de74a7 100644
--- a/include/boost/type_traits/detail/is_function_cxx_11.hpp
+++ b/include/boost/type_traits/detail/is_function_cxx_11.hpp
@@ -384,9 +384,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -399,9 +401,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -414,9 +418,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -429,9 +435,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const volatile BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -445,9 +453,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -460,9 +470,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -475,9 +487,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -490,9 +504,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const volatile &BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -506,9 +522,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...) && BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...) && BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...) && BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -521,9 +539,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -536,9 +556,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
@@ -551,9 +573,11 @@ namespace boost {
 #ifndef _M_AMD64
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __stdcall(Args...)const volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
+#ifndef __CLR_VER
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __fastcall(Args...)const volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};
 #endif
+#endif
 #if !defined(__CLR_VER) && (defined(_M_IX86_FP) && (_M_IX86_FP >= 2) || defined(_M_X64))
    template <class Ret, class...Args BOOST_TT_NOEXCEPT_PARAM>
    struct is_function<Ret __vectorcall(Args...)const volatile &&BOOST_TT_NOEXCEPT_DECL> : public true_type {};