diff options
Diffstat (limited to '3rdParty/Boost/src/boost/spirit/home/classic/core/composite/exclusive_or.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/spirit/home/classic/core/composite/exclusive_or.hpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/spirit/home/classic/core/composite/exclusive_or.hpp b/3rdParty/Boost/src/boost/spirit/home/classic/core/composite/exclusive_or.hpp new file mode 100644 index 0000000..69d4859 --- /dev/null +++ b/3rdParty/Boost/src/boost/spirit/home/classic/core/composite/exclusive_or.hpp @@ -0,0 +1,142 @@ +/*============================================================================= + Copyright (c) 1998-2003 Joel de Guzman + Copyright (c) 2001 Daniel Nuffer + Copyright (c) 2002 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_EXCLUSIVE_OR_HPP) +#define BOOST_SPIRIT_EXCLUSIVE_OR_HPP + +#include <boost/spirit/home/classic/namespace.hpp> +#include <boost/spirit/home/classic/core/parser.hpp> +#include <boost/spirit/home/classic/core/primitives/primitives.hpp> +#include <boost/spirit/home/classic/core/composite/composite.hpp> +#include <boost/spirit/home/classic/meta/as_parser.hpp> + +namespace boost { namespace spirit { + +BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN + + /////////////////////////////////////////////////////////////////////////// + // + // exclusive_or class + // + // Handles expressions of the form: + // + // a ^ b + // + // where a and b are parsers. The expression returns a composite + // parser that matches a or b but not both. One (not both) of the + // operands may be a literal char, wchar_t or a primitive string + // char const*, wchar_t const*. + // + /////////////////////////////////////////////////////////////////////////// + struct exclusive_or_parser_gen; + + template <typename A, typename B> + struct exclusive_or + : public binary<A, B, parser<exclusive_or<A, B> > > + { + typedef exclusive_or<A, B> self_t; + typedef binary_parser_category parser_category_t; + typedef exclusive_or_parser_gen parser_generator_t; + typedef binary<A, B, parser<self_t> > base_t; + + exclusive_or(A const& a, B const& b) + : base_t(a, b) {} + + template <typename ScannerT> + typename parser_result<self_t, ScannerT>::type + parse(ScannerT const& scan) const + { + typedef typename parser_result<self_t, ScannerT>::type result_t; + typedef typename ScannerT::iterator_t iterator_t; + + iterator_t save = scan.first; + result_t l = this->left().parse(scan); + std::swap(save, scan.first); + result_t r = this->right().parse(scan); + + if (l ? !bool(r) : bool(r)) + { + if (l) + scan.first = save; + return l ? l : r; + } + + return scan.no_match(); + } + }; + + struct exclusive_or_parser_gen + { + template <typename A, typename B> + struct result + { + typedef + exclusive_or< + typename as_parser<A>::type + , typename as_parser<B>::type + > + type; + }; + + template <typename A, typename B> + static exclusive_or< + typename as_parser<A>::type + , typename as_parser<B>::type + > + generate(A const& a, B const& b) + { + return exclusive_or<BOOST_DEDUCED_TYPENAME as_parser<A>::type, + BOOST_DEDUCED_TYPENAME as_parser<B>::type> + (as_parser<A>::convert(a), as_parser<B>::convert(b)); + } + }; + + template <typename A, typename B> + exclusive_or<A, B> + operator^(parser<A> const& a, parser<B> const& b); + + template <typename A> + exclusive_or<A, chlit<char> > + operator^(parser<A> const& a, char b); + + template <typename B> + exclusive_or<chlit<char>, B> + operator^(char a, parser<B> const& b); + + template <typename A> + exclusive_or<A, strlit<char const*> > + operator^(parser<A> const& a, char const* b); + + template <typename B> + exclusive_or<strlit<char const*>, B> + operator^(char const* a, parser<B> const& b); + + template <typename A> + exclusive_or<A, chlit<wchar_t> > + operator^(parser<A> const& a, wchar_t b); + + template <typename B> + exclusive_or<chlit<wchar_t>, B> + operator^(wchar_t a, parser<B> const& b); + + template <typename A> + exclusive_or<A, strlit<wchar_t const*> > + operator^(parser<A> const& a, wchar_t const* b); + + template <typename B> + exclusive_or<strlit<wchar_t const*>, B> + operator^(wchar_t const* a, parser<B> const& b); + +BOOST_SPIRIT_CLASSIC_NAMESPACE_END + +}} // namespace BOOST_SPIRIT_CLASSIC_NS + +#endif + +#include <boost/spirit/home/classic/core/composite/impl/exclusive_or.ipp> |