[Boost-bugs] [Boost C++ Libraries] #6616: boost preprocessor bug in 1.49

Subject: [Boost-bugs] [Boost C++ Libraries] #6616: boost preprocessor bug in 1.49
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-02-25 18:06:25

#6616: boost preprocessor bug in 1.49
------------------------------+---------------------------------------------
 Reporter:  sni4ok@…          |       Owner:  no-maintainer
     Type:  Bugs              |      Status:  new          
Milestone:  To Be Determined  |   Component:  preprocessor 
  Version:  Boost 1.49.0      |    Severity:  Problem      
 Keywords:                    |  
------------------------------+---------------------------------------------
 this example work incorrect with boost 1.49 on g++ 4.61 with compile flags
 -std=gnu++0x[[BR]]
 [[BR]]
 #define WRITE_TEST_VALUE(r, data, num, name) std::cout << ", num: " << num
 << ", name: " << BOOST_PP_STRINGIZE(name);[[BR]]
 #define ON_FOREACH_ARGS(ArgsArray, Functor) \[[BR]]
         BOOST_PP_LIST_FOR_EACH_I(Functor, , \[[BR]]
                     BOOST_PP_TUPLE_TO_LIST(BOOST_PP_ARRAY_SIZE(ArgsArray),
 BOOST_PP_ARRAY_DATA(ArgsArray)))[[BR]]
 #define TEST_PP_LIST_FOREACH(ArgsArray) \[[BR]]
     std::cout << "    sz: " << BOOST_PP_ARRAY_SIZE(ArgsArray); \[[BR]]
     ON_FOREACH_ARGS(ArgsArray, WRITE_TEST_VALUE)[[BR]]

 #include <iostream>[[BR]]
 #include <boost/preprocessor/list.hpp>[[BR]]
 #include <boost/preprocessor/tuple.hpp>[[BR]]
 #include <boost/preprocessor/array.hpp>[[BR]]
 #include <boost/preprocessor/stringize.hpp>[[BR]]
 [[BR]]
 int main()[[BR]]
 {[[BR]]
     std::cout << "0:" << std::endl;[[BR]]
     TEST_PP_LIST_FOREACH((0, ()))[[BR]]
     std::cout << std::endl << "1:" << std::endl;[[BR]]
     TEST_PP_LIST_FOREACH((1, (bla)))[[BR]]
     std::cout << std::endl << "2:" << std::endl;[[BR]]
     TEST_PP_LIST_FOREACH((2, (nu, bla)))[[BR]]
     std::cout << std::endl;[[BR]]
     return 0;[[BR]]
 }[[BR]]
 [[BR]]
 output:[[BR]]
 g++ test_pp.cpp -I/home/snike/boost/boost_1_49_0[[BR]]
 ./a.out[[BR]]
 0:[[BR]]
 sz: 0[[BR]]
 1:[[BR]]
 sz: 1, num: 0, name: bla[[BR]]
 2:[[BR]]
 sz: 2, num: 0, name: nu, num: 1, name: bla[[BR]]
 [[BR]]
 output2:[[BR]]
 g++ test_pp.cpp -I/home/snike/boost/boost_1_49_0 -std=gnu++0x[[BR]]
 ./a.out[[BR]]
 0:[[BR]]
 sz: 0, num: 0, name:[[BR]]
 1:[[BR]]
 sz: 1, num: 0, name: bla[[BR]]
 2:[[BR]]
 sz: 2, num: 0, name: nu, num: 1, name: bla[[BR]]
 [[BR]]
 on boost 1.48 this example work correctly

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6616>
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