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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /src/boost/libs/spirit/example/qi/employee.cpp | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/boost/libs/spirit/example/qi/employee.cpp')
-rw-r--r-- | src/boost/libs/spirit/example/qi/employee.cpp | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/boost/libs/spirit/example/qi/employee.cpp b/src/boost/libs/spirit/example/qi/employee.cpp new file mode 100644 index 00000000..c303ff8b --- /dev/null +++ b/src/boost/libs/spirit/example/qi/employee.cpp @@ -0,0 +1,151 @@ +/*============================================================================= + Copyright (c) 2002-2010 Joel de Guzman + + 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) +=============================================================================*/ +/////////////////////////////////////////////////////////////////////////////// +// +// A parser for arbitrary tuples. This example presents a parser +// for an employee structure. +// +// [ JDG May 9, 2007 ] +// +/////////////////////////////////////////////////////////////////////////////// + +#include <boost/config/warning_disable.hpp> +#include <boost/spirit/include/qi.hpp> +#include <boost/spirit/include/phoenix_core.hpp> +#include <boost/spirit/include/phoenix_operator.hpp> +#include <boost/spirit/include/phoenix_object.hpp> +#include <boost/fusion/include/adapt_struct.hpp> +#include <boost/fusion/include/io.hpp> + +#include <iostream> +#include <string> +#include <complex> + +namespace client +{ + namespace qi = boost::spirit::qi; + namespace ascii = boost::spirit::ascii; + + /////////////////////////////////////////////////////////////////////////// + // Our employee struct + /////////////////////////////////////////////////////////////////////////// + //[tutorial_employee_struct + struct employee + { + int age; + std::string surname; + std::string forename; + double salary; + }; + //] +} + +// We need to tell fusion about our employee struct +// to make it a first-class fusion citizen. This has to +// be in global scope. + +//[tutorial_employee_adapt_struct +BOOST_FUSION_ADAPT_STRUCT( + client::employee, + (int, age) + (std::string, surname) + (std::string, forename) + (double, salary) +) +//] + +namespace client +{ + /////////////////////////////////////////////////////////////////////////////// + // Our employee parser + /////////////////////////////////////////////////////////////////////////////// + //[tutorial_employee_parser + template <typename Iterator> + struct employee_parser : qi::grammar<Iterator, employee(), ascii::space_type> + { + employee_parser() : employee_parser::base_type(start) + { + using qi::int_; + using qi::lit; + using qi::double_; + using qi::lexeme; + using ascii::char_; + + quoted_string %= lexeme['"' >> +(char_ - '"') >> '"']; + + start %= + lit("employee") + >> '{' + >> int_ >> ',' + >> quoted_string >> ',' + >> quoted_string >> ',' + >> double_ + >> '}' + ; + } + + qi::rule<Iterator, std::string(), ascii::space_type> quoted_string; + qi::rule<Iterator, employee(), ascii::space_type> start; + }; + //] +} + +//////////////////////////////////////////////////////////////////////////// +// Main program +//////////////////////////////////////////////////////////////////////////// +int +main() +{ + std::cout << "/////////////////////////////////////////////////////////\n\n"; + std::cout << "\t\tAn employee parser for Spirit...\n\n"; + std::cout << "/////////////////////////////////////////////////////////\n\n"; + + std::cout + << "Give me an employee of the form :" + << "employee{age, \"surname\", \"forename\", salary } \n"; + std::cout << "Type [q or Q] to quit\n\n"; + + using boost::spirit::ascii::space; + typedef std::string::const_iterator iterator_type; + typedef client::employee_parser<iterator_type> employee_parser; + + employee_parser g; // Our grammar + std::string str; + while (getline(std::cin, str)) + { + if (str.empty() || str[0] == 'q' || str[0] == 'Q') + break; + + client::employee emp; + std::string::const_iterator iter = str.begin(); + std::string::const_iterator end = str.end(); + bool r = phrase_parse(iter, end, g, space, emp); + + if (r && iter == end) + { + std::cout << boost::fusion::tuple_open('['); + std::cout << boost::fusion::tuple_close(']'); + std::cout << boost::fusion::tuple_delimiter(", "); + + std::cout << "-------------------------\n"; + std::cout << "Parsing succeeded\n"; + std::cout << "got: " << boost::fusion::as_vector(emp) << std::endl; + std::cout << "\n-------------------------\n"; + } + else + { + std::cout << "-------------------------\n"; + std::cout << "Parsing failed\n"; + std::cout << "-------------------------\n"; + } + } + + std::cout << "Bye... :-) \n\n"; + return 0; +} + + |