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Diffstat (limited to 'boost/spirit/home/x3/directive/confix.hpp')
-rw-r--r-- | boost/spirit/home/x3/directive/confix.hpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/boost/spirit/home/x3/directive/confix.hpp b/boost/spirit/home/x3/directive/confix.hpp new file mode 100644 index 0000000000..0d99e58f4e --- /dev/null +++ b/boost/spirit/home/x3/directive/confix.hpp @@ -0,0 +1,83 @@ +/*============================================================================= + Copyright (c) 2009 Chris Hoeppler + Copyright (c) 2014 Lee Clagett + + 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_X3_CONFIX_MAY_30_2014_1819PM) +#define BOOST_SPIRIT_X3_CONFIX_MAY_30_2014_1819PM + +#include <boost/spirit/home/x3/core/parser.hpp> + +namespace boost { namespace spirit { namespace x3 +{ + template<typename Prefix, typename Subject, typename Postfix> + struct confix_directive : + unary_parser<Subject, confix_directive<Prefix, Subject, Postfix>> + { + typedef unary_parser< + Subject, confix_directive<Prefix, Subject, Postfix>> base_type; + static bool const is_pass_through_unary = true; + static bool const handles_container = Subject::handles_container; + + confix_directive(Prefix const& prefix + , Subject const& subject + , Postfix const& postfix) : + base_type(subject), + prefix(prefix), + postfix(postfix) + { + } + + template<typename Iterator, typename Context + , typename RContext, typename Attribute> + bool parse( + Iterator& first, Iterator const& last + , Context& context, RContext& rcontext, Attribute& attr) const + { + Iterator save = first; + + if (!(prefix.parse(first, last, context, rcontext, unused) && + this->subject.parse(first, last, context, rcontext, attr) && + postfix.parse(first, last, context, rcontext, unused))) + { + first = save; + return false; + } + + return true; + } + + Prefix prefix; + Postfix postfix; + }; + + template<typename Prefix, typename Postfix> + struct confix_gen + { + template<typename Subject> + confix_directive< + Prefix, typename extension::as_parser<Subject>::value_type, Postfix> + operator[](Subject const& subject) const + { + return { prefix, as_parser(subject), postfix }; + } + + Prefix prefix; + Postfix postfix; + }; + + + template<typename Prefix, typename Postfix> + confix_gen<typename extension::as_parser<Prefix>::value_type, + typename extension::as_parser<Postfix>::value_type> + confix(Prefix const& prefix, Postfix const& postfix) + { + return { as_parser(prefix), as_parser(postfix) }; + } + +}}} + +#endif |