Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2002-2003 Joel de Guzman
Chris@16:     Copyright (c) 2002-2003 Hartmut Kaiser
Chris@16:     http://spirit.sourceforge.net/
Chris@16: 
Chris@16:   Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: =============================================================================*/
Chris@16: #if !defined(BOOST_SPIRIT_AS_PARSER_HPP)
Chris@16: #define BOOST_SPIRIT_AS_PARSER_HPP
Chris@16: 
Chris@16: #include <boost/spirit/home/classic/namespace.hpp>
Chris@16: #include <boost/spirit/home/classic/core/primitives/primitives.hpp>
Chris@16: 
Chris@16: namespace boost { namespace spirit {
Chris@16: 
Chris@16: BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
Chris@16: 
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     //
Chris@16:     //  Helper templates to derive the parser type from an auxilliary type
Chris@16:     //  and to generate an object of the required parser type given an
Chris@16:     //  auxilliary object. Supported types to convert are parsers,
Chris@16:     //  single characters and character strings.
Chris@16:     //
Chris@16:     ///////////////////////////////////////////////////////////////////////////
Chris@16:     namespace impl
Chris@16:     {
Chris@16:         template<typename T>
Chris@16:         struct default_as_parser
Chris@16:         {
Chris@16:             typedef T type;
Chris@16:             static type const& convert(type const& p)
Chris@16:             {
Chris@16:                 return p;
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         struct char_as_parser
Chris@16:         {
Chris@16:             typedef chlit<char> type;
Chris@16:             static type convert(char ch)
Chris@16:             {
Chris@16:                 return type(ch);
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         struct wchar_as_parser
Chris@16:         {
Chris@16:             typedef chlit<wchar_t> type;
Chris@16:             static type convert(wchar_t ch)
Chris@16:             {
Chris@16:                 return type(ch);
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         struct string_as_parser
Chris@16:         {
Chris@16:             typedef strlit<char const*> type;
Chris@16:             static type convert(char const* str)
Chris@16:             {
Chris@16:                 return type(str);
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         struct wstring_as_parser
Chris@16:         {
Chris@16:             typedef strlit<wchar_t const*> type;
Chris@16:             static type convert(wchar_t const* str)
Chris@16:             {
Chris@16:                 return type(str);
Chris@16:             }
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@16:     template<typename T>
Chris@16:     struct as_parser : impl::default_as_parser<T> {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<char> : impl::char_as_parser {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<wchar_t> : impl::wchar_as_parser {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<char*> : impl::string_as_parser {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<char const*> : impl::string_as_parser {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<wchar_t*> : impl::wstring_as_parser {};
Chris@16: 
Chris@16:     template<>
Chris@16:     struct as_parser<wchar_t const*> : impl::wstring_as_parser {};
Chris@16: 
Chris@16:     template<int N>
Chris@16:     struct as_parser<char[N]> : impl::string_as_parser {};
Chris@16: 
Chris@16:     template<int N>
Chris@16:     struct as_parser<wchar_t[N]> : impl::wstring_as_parser {};
Chris@16: 
Chris@16:     template<int N>
Chris@16:     struct as_parser<char const[N]> : impl::string_as_parser {};
Chris@16: 
Chris@16:     template<int N>
Chris@16:     struct as_parser<wchar_t const[N]> : impl::wstring_as_parser {};
Chris@16: 
Chris@16: BOOST_SPIRIT_CLASSIC_NAMESPACE_END
Chris@16: 
Chris@16: }} // namespace BOOST_SPIRIT_CLASSIC_NS
Chris@16: 
Chris@16: #endif