From b130ceca3a1114bbbc6ecffa07a700a485fbec83 Mon Sep 17 00:00:00 2001
From: Jonathan Turkanis <j@coderage.com>
Date: Tue, 17 May 2005 21:37:25 +0000
Subject: [PATCH] replaced w/ contents of is_custom.hpp

[SVN r28995]
---
 include/boost/iostreams/operations_fwd.hpp | 100 +++------------------
 1 file changed, 13 insertions(+), 87 deletions(-)

diff --git a/include/boost/iostreams/operations_fwd.hpp b/include/boost/iostreams/operations_fwd.hpp
index d040ba9..0616672 100755
--- a/include/boost/iostreams/operations_fwd.hpp
+++ b/include/boost/iostreams/operations_fwd.hpp
@@ -11,103 +11,29 @@
 # pragma once
 #endif
 
-#include <utility>                          // pair.
-#include <boost/config.hpp>                 // DEDUCED_TYPENAME.
-#include <boost/iostreams/detail/ios.hpp>
-#include <boost/iostreams/positioning.hpp>  // stream_offset.
-#include <boost/iostreams/traits.hpp>
+#include <boost/mpl/not.hpp>
+#include <boost/type_traits/is_base_and_derived.hpp>
 
-namespace boost { namespace iostreams {
+namespace boost { namespace iostreams { 
 
-template<typename T>
+template<typename T> 
 struct operations;
 
 namespace detail {
 
-template<typename T> struct read_device_impl;
-template<typename T> struct write_device_impl;
-template<typename T> struct read_filter_impl;
-template<typename T> struct write_filter_impl;
-template<typename T> struct input_sequence_impl;
-template<typename T> struct output_sequence_impl;
-template<typename T> struct seek_impl;
-template<typename T> struct close_impl;
-template<typename T> struct flush_device_impl;
-template<typename T> struct flush_filter_impl;
-template<typename T> struct imbue_impl;
-template<typename T> struct optimal_buffer_size_impl;
+struct custom_tag { };
 
-template<> struct read_device_impl<int> { typedef int type; };
-template<> struct write_device_impl<int> { typedef int type; };
-template<> struct read_filter_impl<int> { typedef int type; };
-template<> struct write_filter_impl<int> { typedef int type; };
-template<> struct input_sequence_impl<int> { typedef int type; };
-template<> struct output_sequence_impl<int> { typedef int type; };
-template<> struct seek_impl<int> { typedef int type; };
-template<> struct close_impl<int> { typedef int type; };
-template<> struct flush_device_impl<int> { typedef int type; };
-template<> struct flush_filter_impl<int> { typedef int type; };
-template<> struct imbue_impl<int> { typedef int type; };
-template<> struct optimal_buffer_size_impl<int> { typedef int type; };
+template<typename T>
+struct is_custom
+    : mpl::not_<
+          is_base_and_derived< custom_tag, operations<T> >
+      >
+    { };
 
 } // End namespace detail.
 
-template<typename T>
-typename io_int<T>::type get(T&);
-
-template<typename T>
-std::streamsize read(T&, typename io_char<T>::type*, std::streamsize);
-
-template<typename T, typename Source>
-std::streamsize read(T&, Source&, typename io_char<T>::type*, std::streamsize);
-
-template<typename T>
-bool putback(T&, typename io_char<T>::type);
-
-template<typename T>
-bool put(T&, typename io_char<T>::type);
-
-template<typename T>
-std::streamsize write(T&, const typename io_char<T>::type*, std::streamsize);
-
-template<typename T, typename Sink>
-std::streamsize write(T&, Sink&, const typename io_char<T>::type*, std::streamsize);
-
-template<typename T>
-std::streampos seek( T& t, stream_offset off, BOOST_IOS::seekdir way,
-                     BOOST_IOS::openmode which = BOOST_IOS::in | BOOST_IOS::out );
-
-template<typename T>
-std::pair<
-    BOOST_DEDUCED_TYPENAME io_char<T>::type*,
-    BOOST_DEDUCED_TYPENAME io_char<T>::type*
->
-input_sequence(T&);
-
-template<typename T>
-std::pair<
-    BOOST_DEDUCED_TYPENAME io_char<T>::type*,
-    BOOST_DEDUCED_TYPENAME io_char<T>::type*
->
-output_sequence(T&);
-
-template<typename T>
-void close(T&, BOOST_IOS::openmode);
-
-template<typename T, typename Sink>
-void close(T&, Sink& snk, BOOST_IOS::openmode);
-
-template<typename T>
-bool flush(T&);
-
-template<typename T, typename Sink>
-bool flush(T&, Sink&);
-
-template<typename T, typename Locale>
-void imbue(T&, const Locale&);
-
-template<typename T>
-std::streamsize optimal_buffer_size(const T&);
+template<typename T> 
+struct operations : detail::custom_tag { };
 
 } } // End namespaces iostreams, boost.