[LLVMbugs] [Bug 21196] New: Clang svn r219085 fails to compile regex program using libstdc++ in C++1y, C++14, C++1z

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21196

            Bug ID: 21196
           Summary: Clang svn r219085 fails to compile regex program using
                    libstdc++ in C++1y, C++14, C++1z
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: remyabel at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13163
  --> http://llvm.org/bugs/attachment.cgi?id=13163&action=edit
The test program which uses regex

For more information, see
https://stackoverflow.com/questions/26245167/compiling-regex-program-in-clang-for-libstdc-in-c14-mode-causes-errors

The libstdc++ binary is libstdc++.so.6.0.20

The following test program works fine with the following command lines for the
attached test program (using gcc 4.9.1):

g++4.9 -std=c++11 test.cpp
g++4.9 -std=c++1y test.cpp
g++4.9 -std=c++14 test.cpp
clang++ -stdlib=libstdc++ -std=c++11 test.cpp
clang++ -stdlib=libc++ -std=c++11 test.cpp
clang++ -stdlib=libc++ -std=c++1y test.cpp
clang++ -stdlib=libc++ -std=c++14 test.cpp
clang++ -stdlib=libc++ -std=c++1z test.cpp

When using the following command lines:

clang++ -stdlib=libstdc++ -std=c++1y test.cpp
clang++ -stdlib=libstdc++ -std=c++14 test.cpp
clang++ -stdlib=libstdc++ -std=c++1y test.cpp

it fails to compile with the following errors:

    In file included from main.cpp:4:
    In file included from
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/regex:58:
    In file included from
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.h:2721:
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.tcc:632:11:
error: member function '_M_end_of_seq' not viable: 'this' argument has type
'const std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >', but function is
not marked const
          if (_M_end_of_seq() && __rhs._M_end_of_seq())
              ^~~~~~~~~~~~~
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.h:2641:24:
note: in instantiation of member function
'std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >::operator=='
requested here
          { return !(*this == __rhs); }
                           ^
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/stl_algobase.h:305:19:
note: in instantiation of member function
'std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >::operator!='
requested here
              for (; __first != __last; ++__result, ++__first)
                             ^
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/stl_algobase.h:396:36:
note: in instantiation of function template specialization
'std::__copy_move<false, false,
std::forward_iterator_tag>::__copy_m<std::regex_token_iterator<__gnu_cxx::__normal_iterator<const
char *, std::basic_string<char> >, char, std::regex_traits<char> >,
std::ostream_iterator<std::basic_string<char>, char, std::char_traits<char> >
>' requested here
                                  _Category>::__copy_m(__first, __last,
__result);
                                              ^
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/stl_algobase.h:432:23:
note: in instantiation of function template specialization
'std::__copy_move_a<false,
std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >,
std::ostream_iterator<std::basic_string<char>, char, std::char_traits<char> >
>' requested here
          return _OI(std::__copy_move_a<_IsMove>(std::__niter_base(__first),
                          ^
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/stl_algobase.h:464:20:
note: in instantiation of function template specialization
'std::__copy_move_a2<false,
std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >,
std::ostream_iterator<std::basic_string<char>, char, std::char_traits<char> >
>' requested here
          return (std::__copy_move_a2<__is_move_iterator<_II>::__value>
                       ^
    main.cpp:13:9: note: in instantiation of function template specialization
'std::copy<std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >,
std::ostream_iterator<std::basic_string<char>, char, std::char_traits<char> >
>' requested here
       std::copy( std::sregex_token_iterator(text.begin(), text.end(), ws_re,
-1),
            ^
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.h:2690:7:
note: '_M_end_of_seq' declared here
          _M_end_of_seq()
          ^
    In file included from main.cpp:4:
    In file included from
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/regex:58:
    In file included from
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.h:2721:
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.tcc:637:11:
error: member function '_M_end_of_seq' not viable: 'this' argument has type
'const std::regex_token_iterator<__gnu_cxx::__normal_iterator<const char *,
std::basic_string<char> >, char, std::regex_traits<char> >', but function is
not marked const
          if (_M_end_of_seq() || _M_suffix.matched
    a
              ^~~~~~~~~~~~~
   
/usr/local/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../include/c++/4.9.0/bits/regex.h:2690:7:
note: '_M_end_of_seq' declared here
          _M_end_of_seq()

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