preliminary support for calling conventions

example/calling_convention_cdecl.cpp

@@ -0,0 +1,34 @@
+/*!<-
+Copyright (c) 2016 Barrett Adair
+
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+->*/
+
+//[ calling_convention_cdecl
+
+#define CALLABLE_TRAITS_ENABLE_CDECL
+
+#include <type_traits>
+#include <callable_traits/has_calling_convention.hpp>
+#include <callable_traits/add_calling_convention.hpp>
+
+namespace ct = callable_traits;
+namespace cc = callable_traits::calling_conventions;
+
+struct foo {};
+
+int main() {
+
+    using pmf = void(foo::*)();
+    using pmf_cdecl = void(__cdecl foo::*)();
+
+    static_assert(!std::is_same<pmf, pmf_cdecl>::value, "");
+    static_assert(!ct::has_calling_convention<pmf, cc::cdecl>(), "");
+    static_assert(ct::has_calling_convention<pmf_cdecl, cc::cdecl>(), "");
+
+    using test = ct::add_calling_convention<pmf, cc::cdecl>;
+    static_assert(std::is_same<test, pmf_cdecl>::value, "");
+    static_assert(ct::has_calling_convention<test, cc::cdecl>(), "");
+}
+//]