Stratosphere: Add WrapIpcCommandImpl templating.

stratosphere/loader/include/boost/callable_traits/has_varargs.hpp

@@ -0,0 +1,94 @@
+/*
+
+@Copyright Barrett Adair 2015-2017
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+*/
+
+#ifndef BOOST_CLBL_TRTS_HAS_VARARGS_HPP
+#define BOOST_CLBL_TRTS_HAS_VARARGS_HPP
+
+#include <boost/callable_traits/detail/core.hpp>
+
+namespace boost { namespace callable_traits {
+
+//[ has_varargs_hpp
+/*`[section:ref_has_varargs has_varargs]
+[heading Header]
+``#include <boost/callable_traits/has_varargs.hpp>``
+[heading Definition]
+*/
+
+
+// inherits from either std::true_type or std::false_type
+template<typename T>
+struct has_varargs;
+
+//<-
+template<typename T>
+struct has_varargs : detail::traits<
+    detail::shallow_decay<T>>::has_varargs {
+
+    using type = typename detail::traits<
+        detail::shallow_decay<T>>::has_varargs;
+};
+
+#ifdef BOOST_CLBL_TRTS_DISABLE_VARIABLE_TEMPLATES
+
+template<typename T>
+struct has_varargs_v {
+    static_assert(std::is_same<T, detail::dummy>::value,
+        "Variable templates not supported on this compiler.");
+};
+
+#else
+//->
+// only available when variable templates are supported
+template<typename T>
+//<-
+BOOST_CLBL_TRAITS_INLINE_VAR
+//->
+constexpr bool has_varargs_v = //see below
+//<-
+    detail::traits<detail::shallow_decay<T>>::has_varargs::value;
+
+#endif
+
+}} // namespace boost::callable_traits
+//->
+
+/*`
+[heading Constraints]
+* none
+
+[heading Behavior]
+* `std::false_type` is inherited by `has_varargs<T>` and is aliased by `typename has_varargs<T>::type`, except when one of the following criteria is met, in which case `std::true_type` would be similarly inherited and aliased:
+  * `T` is a function, function pointer, or function reference where the function's parameter list includes C-style variadics.
+  * `T` is a pointer to a member function with C-style variadics in the parameter list.
+  * `T` is a function object with a non-overloaded `operator()`, which has C-style variadics in the parameter list of its `operator()`.
+* On compilers that support variable templates, `has_varargs_v<T>` is equivalent to `has_varargs<T>::value`.
+
+[heading Input/Output Examples]
+[table
+    [[`T`]                              [`has_varargs_v<T>`]]
+    [[`void(...)`]                      [`true`]]
+    [[`void(int, ...) const`]           [`true`]]
+    [[`void(* volatile)(...)`]          [`true`]]
+    [[`void(&)(...)`]                   [`true`]]
+    [[`void(foo::*)(...) const`]        [`true`]]
+    [[`void(*)()`]                      [`false`]]
+    [[`void(*&)()`]                     [`false`]]
+    [[`int`]                            [`false`]]
+    [[`const int`]                      [`false`]]
+    [[`int foo::*`]                     [`false`]]
+]
+
+[heading Example Program]
+[import ../example/has_varargs.cpp]
+[has_varargs]
+[endsect]
+*/
+//]
+
+#endif