?????????? ????????? - ??????????????? - /usr/include/boost/spirit/home/support/detail/get_encoding.hpp
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// Copyright (c) 2001-2011 Hartmut Kaiser // Copyright (c) 2001-2011 Joel de Guzman // // 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) #if !defined(BOOST_SPIRIT_GET_ENCODING_JANUARY_13_2009_1255PM) #define BOOST_SPIRIT_GET_ENCODING_JANUARY_13_2009_1255PM #if defined(_MSC_VER) #pragma once #endif #include <boost/mpl/identity.hpp> #include <boost/type_traits/is_same.hpp> namespace boost { namespace spirit { namespace detail { template <typename Modifiers, typename Encoding> struct get_implicit_encoding { // Extract the implicit encoding from the Modifiers // If one is not found, Encoding is used. The explicit // encoding is the first viable encoding that can be // extracted from the Modifiers (there can be more than one). typedef typename mpl::find_if< char_encodings, has_modifier<Modifiers, tag::char_encoding_base<mpl::_1> > >::type iter; typedef typename mpl::eval_if< is_same<iter, typename mpl::end<char_encodings>::type>, mpl::identity<Encoding>, mpl::deref<iter> >::type type; }; template <typename Modifiers, typename Encoding> struct get_encoding { // Extract the explicit encoding from the Modifiers // If one is not found, get implicit encoding (see above). // Explicit encoding is the encoding explicitly declared // using the encoding[c] directive. typedef typename mpl::find_if< char_encodings, has_modifier<Modifiers, tag::char_code<tag::encoding, mpl::_1> > >::type iter; typedef typename mpl::eval_if< is_same<iter, typename mpl::end<char_encodings>::type>, get_implicit_encoding<Modifiers, Encoding>, mpl::deref<iter> >::type type; }; template <typename Modifiers, typename Encoding, bool case_modifier = false> struct get_encoding_with_case : mpl::identity<Encoding> {}; template <typename Modifiers, typename Encoding> struct get_encoding_with_case<Modifiers, Encoding, true> : get_encoding<Modifiers, Encoding> {}; }}} #endif
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