/*============================================================================= Copyright (c) 2002-2003 Joel de Guzman Copyright (c) 2002-2003 Hartmut Kaiser http://spirit.sourceforge.net/ 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_AS_PARSER_HPP) #define BOOST_SPIRIT_AS_PARSER_HPP #include <boost/spirit/home/classic/namespace.hpp> #include <boost/spirit/home/classic/core/primitives/primitives.hpp> namespace boost { namespace spirit { BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN /////////////////////////////////////////////////////////////////////////// // // Helper templates to derive the parser type from an auxilliary type // and to generate an object of the required parser type given an // auxilliary object. Supported types to convert are parsers, // single characters and character strings. // /////////////////////////////////////////////////////////////////////////// namespace impl { template<typename T> struct default_as_parser { typedef T type; static type const& convert(type const& p) { return p; } }; struct char_as_parser { typedef chlit<char> type; static type convert(char ch) { return type(ch); } }; struct wchar_as_parser { typedef chlit<wchar_t> type; static type convert(wchar_t ch) { return type(ch); } }; struct string_as_parser { typedef strlit<char const*> type; static type convert(char const* str) { return type(str); } }; struct wstring_as_parser { typedef strlit<wchar_t const*> type; static type convert(wchar_t const* str) { return type(str); } }; } template<typename T> struct as_parser : impl::default_as_parser<T> {}; template<> struct as_parser<char> : impl::char_as_parser {}; template<> struct as_parser<wchar_t> : impl::wchar_as_parser {}; template<> struct as_parser<char*> : impl::string_as_parser {}; template<> struct as_parser<char const*> : impl::string_as_parser {}; template<> struct as_parser<wchar_t*> : impl::wstring_as_parser {}; template<> struct as_parser<wchar_t const*> : impl::wstring_as_parser {}; template<int N> struct as_parser<char[N]> : impl::string_as_parser {}; template<int N> struct as_parser<wchar_t[N]> : impl::wstring_as_parser {}; template<int N> struct as_parser<char const[N]> : impl::string_as_parser {}; template<int N> struct as_parser<wchar_t const[N]> : impl::wstring_as_parser {}; BOOST_SPIRIT_CLASSIC_NAMESPACE_END }} // namespace BOOST_SPIRIT_CLASSIC_NS #endif