ceph/src/boost/libs/spirit/test/x3/rule3.cpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2012 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 =============================================================================*/
   7
   8 // this file deliberately contains non-ascii characters
   9 // boostinspect:noascii
  10
  11 #include <boost/detail/lightweight_test.hpp>
  12 #include <boost/spirit/home/x3.hpp>
  13 #include <boost/fusion/include/std_pair.hpp>
  14
  15 #include <string>
  16 #include <cstring>
  17 #include <iostream>
  18 #include "test.hpp"
  19
  20 using boost::spirit::x3::_val;
  21
  22 struct f
  23 {
  24     template <typename Context>
  25     void operator()(Context const& ctx) const
  26     {
  27         _val(ctx) += _attr(ctx);
  28     }
  29 };
  30
  31 int main()
  32 {
  33     using spirit_test::test_attr;
  34     using spirit_test::test;
  35
  36     using namespace boost::spirit::x3::ascii;
  37     using boost::spirit::x3::rule;
  38     using boost::spirit::x3::int_;
  39     using boost::spirit::x3::lit;
  40
  41
  42     { // synth attribute value-init
  43
  44         std::string s;
  45         typedef rule<class r, std::string> rule_type;
  46
  47         auto rdef = rule_type()
  48             = alpha                 [f()]
  49             ;
  50
  51         BOOST_TEST(test_attr("abcdef", +rdef, s));
  52         BOOST_TEST(s == "abcdef");
  53     }
  54
  55     { // synth attribute value-init
  56
  57         std::string s;
  58         typedef rule<class r, std::string> rule_type;
  59
  60         auto rdef = rule_type() =
  61             alpha /
  62                [](auto& ctx)
  63                {
  64                   _val(ctx) += _attr(ctx);
  65                }
  66             ;
  67
  68         BOOST_TEST(test_attr("abcdef", +rdef, s));
  69         BOOST_TEST(s == "abcdef");
  70     }
  71
  72     return boost::report_errors();
  73 }