boost/iostreams/imbue.hpp

   1 // (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
   2 // (C) Copyright 2003-2007 Jonathan Turkanis
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
   5
   6 // See http://www.boost.org/libs/iostreams for documentation.
   7
   8 #ifndef BOOST_IOSTREAMS_IMBUE_HPP_INCLUDED
   9 #define BOOST_IOSTREAMS_IMBUE_HPP_INCLUDED
  10
  11 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
  12 # pragma once
  13 #endif
  14
  15 #include <boost/config.hpp>  // DEDUCED_TYPENAME, MSVC.
  16 #include <boost/detail/workaround.hpp>
  17 #include <boost/iostreams/detail/dispatch.hpp>
  18 #include <boost/iostreams/detail/streambuf.hpp>
  19 #include <boost/iostreams/detail/wrap_unwrap.hpp>
  20 #include <boost/iostreams/operations_fwd.hpp>
  21 #include <boost/mpl/if.hpp>
  22
  23 // Must come last.
  24 #include <boost/iostreams/detail/config/disable_warnings.hpp>
  25
  26 namespace boost { namespace iostreams {
  27
  28 namespace detail {
  29
  30 // Implementation templates for simulated tag dispatch.
  31 template<typename T>
  32 struct imbue_impl;
  33
  34 } // End namespace detail.
  35
  36 template<typename T, typename Locale>
  37 void imbue(T& t, const Locale& loc)
  38 { detail::imbue_impl<T>::imbue(detail::unwrap(t), loc); }
  39
  40 namespace detail {
  41
  42 //------------------Definition of imbue_impl----------------------------------//
  43
  44 template<typename T>
  45 struct imbue_impl
  46     : mpl::if_<
  47           is_custom<T>,
  48           operations<T>,
  49           imbue_impl<
  50               BOOST_DEDUCED_TYPENAME
  51               dispatch<
  52                   T, streambuf_tag, localizable_tag, any_tag
  53               >::type
  54           >
  55       >::type
  56     { };
  57
  58 template<>
  59 struct imbue_impl<any_tag> {
  60     template<typename T, typename Locale>
  61     static void imbue(T&, const Locale&) { }
  62 };
  63
  64 template<>
  65 struct imbue_impl<streambuf_tag> {
  66     template<typename T, typename Locale>
  67     static void imbue(T& t, const Locale& loc) { t.pubimbue(loc); }
  68 };
  69
  70 template<>
  71 struct imbue_impl<localizable_tag> {
  72     template<typename T, typename Locale>
  73     static void imbue(T& t, const Locale& loc) { t.imbue(loc); }
  74 };
  75
  76 } // End namespace detail.
  77
  78 } } // End namespaces iostreams, boost.
  79
  80 #include <boost/iostreams/detail/config/enable_warnings.hpp>
  81
  82 #endif // #ifndef BOOST_IOSTREAMS_IMBUE_HPP_INCLUDED