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#ifndef BOOST_METAPARSE_V1_IMPL_POP_FRONT_HPP
#define BOOST_METAPARSE_V1_IMPL_POP_FRONT_HPP
// Copyright Abel Sinkovics (abel@sinkovics.hu) 2013.
// 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)
#include <boost/metaparse/config.hpp>
#include <boost/metaparse/v1/fwd/string.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
namespace boost
{
namespace metaparse
{
namespace v1
{
namespace impl
{
template <class S>
struct pop_front;
#ifdef BOOST_METAPARSE_VARIADIC_STRING
template <char C, char... Cs>
struct pop_front<string<C, Cs...>> : string<Cs...> {};
#else
#ifdef BOOST_METAPARSE_POP_FRONT
# error BOOST_METAPARSE_POP_FRONT already defined
#endif
#define BOOST_METAPARSE_POP_FRONT(z, n, unused) \
BOOST_PP_COMMA_IF(BOOST_PP_DEC(n)) BOOST_PP_CAT(C, n)
template < \
BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, int C) \
>
struct
pop_front<
string<BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, C)>
> :
string<
BOOST_PP_REPEAT_FROM_TO(
1,
BOOST_METAPARSE_LIMIT_STRING_SIZE,
BOOST_METAPARSE_POP_FRONT,
~
),
BOOST_NO_CHAR
>
{};
#undef BOOST_METAPARSE_POP_FRONT
#endif
}
}
}
}
#endif
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