ceph/src/boost/libs/spirit/test/lex/regression_file_iterator1.cpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //  Copyright (c) 2010 Mathias Gaunard
   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 // #define BOOST_SPIRIT_LEXERTL_DEBUG
   8
   9 #include <boost/config/warning_disable.hpp>
  10 #include <boost/detail/lightweight_test.hpp>
  11
  12 #include <boost/spirit/include/support_multi_pass.hpp>
  13 #include <boost/spirit/include/classic_position_iterator.hpp>
  14 #include <boost/spirit/include/lex_lexertl.hpp>
  15
  16 #include <boost/spirit/include/phoenix.hpp>
  17
  18 namespace spirit = boost::spirit;
  19 namespace lex = spirit::lex;
  20 namespace phoenix = boost::phoenix;
  21
  22 typedef spirit::classic::position_iterator2<
  23     spirit::multi_pass<std::istreambuf_iterator<char> >
  24 > file_iterator;
  25
  26 typedef boost::iterator_range<file_iterator> file_range;
  27
  28 inline file_iterator
  29 make_file_iterator(std::istream& input, const std::string& filename)
  30 {
  31     return file_iterator(
  32         spirit::make_default_multi_pass(
  33             std::istreambuf_iterator<char>(input)),
  34         spirit::multi_pass<std::istreambuf_iterator<char> >(),
  35         filename);
  36 }
  37
  38 struct identifier
  39 {
  40     identifier(file_iterator, file_iterator)
  41     {
  42     }
  43 };
  44
  45 struct string_literal
  46 {
  47     string_literal(file_iterator, file_iterator)
  48     {
  49     }
  50 };
  51
  52 typedef lex::lexertl::token<
  53     file_iterator, boost::mpl::vector<identifier, string_literal>
  54 > token_type;
  55
  56 struct lexer
  57   : lex::lexer<lex::lexertl::actor_lexer<token_type> >
  58 {
  59     lexer()
  60       : id("[a-zA-Z0-9]+", 1)
  61       , st("'[^'\\n]*'", 2)
  62     {
  63         self("ST") =
  64                 st [ lex::_state = "INITIAL" ]
  65             ;
  66
  67         self("*") =
  68                 id                       [ lex::_state = "ST" ]
  69             |   lex::token_def<>(".", 3) [ lex::_state = "ST" ]
  70             ;
  71     }
  72
  73     lex::token_def<identifier> id;
  74     lex::token_def<string_literal> st;
  75 };
  76
  77 typedef lexer::iterator_type token_iterator;
  78
  79 int main()
  80 {
  81     std::stringstream ss;
  82     ss << "foo 'bar'";
  83
  84     file_iterator begin = make_file_iterator(ss, "SS");
  85     file_iterator end;
  86
  87     lexer l;
  88     token_iterator begin2 = l.begin(begin, end, "ST");
  89     token_iterator end2 = l.end();
  90
  91     std::size_t test_data[] = { 1, 3, 2 };
  92     std::size_t const test_data_size = sizeof(test_data)/sizeof(test_data[0]);
  93
  94     token_iterator it = begin2;
  95     std::size_t i = 0;
  96     for (/**/; it != end2 && i < test_data_size; ++it, ++i)
  97     {
  98         BOOST_TEST(it->id() == test_data[i]);
  99     }
 100     BOOST_TEST(it == end2);
 101     BOOST_TEST(i == test_data_size);
 102
 103     return boost::report_errors();
 104 }