• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 
2 // Copyright 2018 Peter Dimov.
3 //
4 // Distributed under the Boost Software License, Version 1.0.
5 //
6 // See accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt
8 
9 #include <boost/wave.hpp>
10 #include <boost/wave/cpplexer/cpp_lex_token.hpp>
11 #include <boost/wave/cpplexer/cpp_lex_iterator.hpp>
12 #include <iostream>
13 
main()14 int main()
15 {
16     std::string input(
17         "#if 0\n"
18         "6.28\n"
19         "#else\n"
20         "3.14\n"
21         "#endif\n"
22     );
23 
24     try
25     {
26         typedef boost::wave::cpplexer::lex_token<> token_type;
27         typedef boost::wave::cpplexer::lex_iterator<token_type> lex_iterator_type;
28         typedef boost::wave::context<std::string::iterator, lex_iterator_type> context_type;
29 
30         context_type ctx( input.begin(), input.end(), "input.cpp" );
31 
32         for( context_type::iterator_type first = ctx.begin(), last = ctx.end(); first != last; ++first )
33         {
34             std::cout << first->get_value();
35         }
36 
37         return 0;
38     }
39     catch( boost::wave::cpp_exception const & x )
40     {
41         std::cerr << x.file_name() << "(" << x.line_no() << "): " << x.description() << std::endl;
42         return 1;
43     }
44     catch( std::exception const & x )
45     {
46         std::cerr << "Exception: " << x.what() << std::endl;
47         return 2;
48     }
49 }
50