ceph/src/boost/libs/spirit/test/lex/regression_file_iterator3.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_DEBUG 1    // required for token streaming
   8 // #define BOOST_SPIRIT_LEXERTL_DEBUG 1
   9
  10 #include <boost/spirit/include/support_multi_pass.hpp>
  11 #include <boost/spirit/include/classic_position_iterator.hpp>
  12 #include <boost/spirit/include/lex_lexertl.hpp>
  13
  14 #include <boost/core/lightweight_test.hpp>
  15 #include <boost/phoenix/core.hpp>
  16 #include <boost/phoenix/operator.hpp>
  17 #include <boost/phoenix/statement.hpp>
  18
  19 #include <sstream>
  20
  21 namespace spirit = boost::spirit;
  22 namespace lex = spirit::lex;
  23 namespace phoenix = boost::phoenix;
  24
  25 typedef spirit::classic::position_iterator2<
  26     spirit::multi_pass<std::istreambuf_iterator<char> >
  27 > file_iterator;
  28
  29 typedef boost::iterator_range<file_iterator> file_range;
  30
  31 inline file_iterator
  32 make_file_iterator(std::istream& input, const std::string& filename)
  33 {
  34     return file_iterator(
  35         spirit::make_default_multi_pass(
  36             std::istreambuf_iterator<char>(input)),
  37         spirit::multi_pass<std::istreambuf_iterator<char> >(),
  38         filename);
  39 }
  40
  41 struct string_literal
  42 {
  43     string_literal(file_iterator, file_iterator)
  44     {
  45     }
  46 };
  47
  48 typedef lex::lexertl::token<
  49     file_iterator, boost::mpl::vector<string_literal>
  50 > token_type;
  51
  52 struct lexer
  53   : lex::lexer<lex::lexertl::actor_lexer<token_type> >
  54 {
  55     lexer() : st("'[^'\\n]*'", 1)
  56     {
  57         lex::token_def<> string_lookahead('\'');
  58         self("LA") = string_lookahead;
  59
  60         // make sure lookahead is implicitly evaluated using the lexer state
  61         // the token_def has been associated with
  62         self = st [
  63                 phoenix::if_(lex::lookahead(string_lookahead)) [ lex::more() ]
  64             ]
  65             ;
  66     }
  67
  68     lex::token_def<string_literal> st;
  69 };
  70
  71 typedef lexer::iterator_type token_iterator;
  72
  73 int main()
  74 {
  75     std::stringstream ss;
  76     ss << "'foo''bar'";
  77
  78     file_iterator begin = make_file_iterator(ss, "SS");
  79     file_iterator end;
  80
  81     lexer l;
  82     token_iterator begin2 = l.begin(begin, end);
  83     token_iterator end2 = l.end();
  84
  85     char const* test_data[] = { "1,'foo'", "1,'foo''bar'" };
  86     std::size_t const test_data_size = sizeof(test_data)/sizeof(test_data[0]);
  87
  88     token_iterator it = begin2;
  89     std::size_t i = 0;
  90     for (/**/; it != end2 && i < test_data_size; ++it, ++i)
  91     {
  92         std::stringstream ss2;
  93         ss2 << it->id() << "," << *it;
  94         BOOST_TEST(ss2.str() == test_data[i]);
  95     }
  96     BOOST_TEST(it == end2);
  97     BOOST_TEST(i == test_data_size);
  98
  99     return boost::report_errors();
 100 }