// 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
|
