整理

include/boost/detail/is_xxx.hpp

@@ -0,0 +1,27 @@
+// Copyright David Abrahams 2005. Distributed under the Boost
+// Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_DETAIL_IS_XXX_DWA20051011_HPP
+# define BOOST_DETAIL_IS_XXX_DWA20051011_HPP
+
+# include <boost/config.hpp>
+# include <boost/type_traits/integral_constant.hpp>
+# include <boost/preprocessor/enum_params.hpp>
+
+
+#  define BOOST_DETAIL_IS_XXX_DEF(name, qualified_name, nargs)  \
+template <class T>                                              \
+struct is_##name : boost::false_type                            \
+{                                                               \
+};                                                              \
+                                                                \
+template < BOOST_PP_ENUM_PARAMS_Z(1, nargs, class T) >          \
+struct is_##name<                                               \
+   qualified_name< BOOST_PP_ENUM_PARAMS_Z(1, nargs, T) >        \
+>                                                               \
+   : boost::true_type                                           \
+{                                                               \
+};
+
+
+#endif // BOOST_DETAIL_IS_XXX_DWA20051011_HPP