comparison DEPENDENCIES/generic/include/boost/proto/detail/is_noncopyable.hpp @ 16:2665513ce2d3

Add boost headers

+///////////////////////////////////////////////////////////////////////////////
+/// \file is_noncopyable.hpp
+/// Utility for detecting when types are non-copyable
+//
+//  Copyright 2008 Eric Niebler. 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_PROTO_DETAIL_IS_NONCOPYABLE_HPP_EAN_19_07_2012
+#define BOOST_PROTO_DETAIL_IS_NONCOPYABLE_HPP_EAN_19_07_2012
+
+#include <boost/noncopyable.hpp>
+#include <boost/mpl/or.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/type_traits/is_base_of.hpp>
+#include <boost/type_traits/is_abstract.hpp>
+#include <boost/type_traits/is_function.hpp>
+#include <boost/proto/proto_fwd.hpp>
+
+namespace boost { namespace proto { namespace detail
+{
+    // All classes derived from std::ios_base have these public nested types,
+    // and are non-copyable. This is an imperfect test, but it's the best we
+    // we can do.
+    template<typename T>
+    yes_type check_is_iostream(
+        typename T::failure *
+      , typename T::Init *
+      , typename T::fmtflags *
+      , typename T::iostate *
+      , typename T::openmode *
+      , typename T::seekdir *
+    );
+
+    template<typename T>
+    no_type check_is_iostream(...);
+
+    template<typename T>
+    struct is_iostream
+    {
+        static bool const value = sizeof(yes_type) == sizeof(check_is_iostream<T>(0,0,0,0,0,0));
+        typedef mpl::bool_<value> type;
+    };
+
+    /// INTERNAL ONLY
+    // This should be a customization point. And it serves the same purpose
+    // as the is_noncopyable trait in Boost.Foreach. 
+    template<typename T>
+    struct is_noncopyable
+        : mpl::or_<
+            is_function<T>
+          , is_abstract<T>
+          , is_iostream<T>
+          , is_base_of<noncopyable, T>
+        >
+    {};
+
+    template<typename T, std::size_t N>
+    struct is_noncopyable<T[N]>
+      : mpl::true_
+    {};
+
+}}}
+
+#endif