C++ 使用boost:：wave时出现运行时错误消息

我得到以下运行时错误消息

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::wave::cpplexer::lexing_exception> >'
  what():  boost::wave::lexing_exception

此代码应从C++中删除C++注释，该代码由<代码> //< /COD>和<代码> /*…*/<代码>

以下是gdb回溯：

GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Type "show configuration" for configuration details.
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Reading symbols from a.out...done.
[New LWP 10573]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./a.out'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007ff38fe96cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56  ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ff38fe96cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ff38fe9a0d8 in __GI_abort () at abort.c:89
#2  0x00007ff3904cb78d in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007ff3904c97f6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007ff3904c9841 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007ff3904c9a58 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007ff390a9e063 in void boost::throw_exception<boost::wave::cpplexer::lexing_exception>(boost::wave::cpplexer::lexing_exception const&)
    () from /usr/lib/x86_64-linux-gnu/libboost_wave.so.1.54.0
#7  0x00007ff390aa3a5e in boost::wave::cpplexer::re2clex::lexer<__gnu_cxx::__normal_iterator<char const*, std::string>, boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > >, boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >::report_error(boost::wave::cpplexer::re2clex::Scanner const*, int, char const*, ...) ()
   from /usr/lib/x86_64-linux-gnu/libboost_wave.so.1.54.0
#8  0x00007ff390aaf2f0 in boost::wave::cpplexer::re2clex::scan(boost::wave::cpplexer::re2clex::Scanner*) ()
   from /usr/lib/x86_64-linux-gnu/libboost_wave.so.1.54.0
#9  0x00007ff390aa4329 in boost::wave::cpplexer::re2clex::lexer<__gnu_cxx::__normal_iterator<char const*, std::string>, boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > >, boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >::get(boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > >&) () from /usr/lib/x86_64-linux-gnu/libboost_wave.so.1.54.0
#10 0x000000000040a3b8 in boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >::get_next<boost::spirit::multi_pass<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::default_policy<boost::spirit::iterator_policies::ref_counted, boost::spirit::iterator_policies::no_check, boost::spirit::iterator_policies::split_functor_input, boost::spirit::iterator_policies::split_std_deque> > > (mp=..., result=...)
    at /usr/include/boost/wave/cpplexer/cpp_lex_iterator.hpp:80
#11 0x0000000000409efb in boost::spirit::iterator_policies::split_functor_input::unique<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, true>::advance_input<boost::spirit::multi_pass<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util---Type <return> to continue, or q <return> to quit---
::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::default_policy<boost::spirit::iterator_policies::ref_counted, boost::spirit::iterator_policies::no_check, boost::spirit::iterator_policies::split_functor_input, boost::spirit::iterator_policies::split_std_deque> > > (mp=...)
    at /usr/include/boost/spirit/home/support/iterators/detail/split_functor_input_policy.hpp:91
#12 0x000000000040969f in boost::spirit::iterator_policies::multi_pass_unique<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::ref_counted::unique, boost::spirit::iterator_policies::no_check::unique, boost::spirit::iterator_policies::split_functor_input::unique<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, true>, boost::spirit::iterator_policies::split_std_deque::unique<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, true, true, true>::advance_input<boost::spirit::multi_pass<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::default_policy<boost::spirit::iterator_policies::ref_counted, boost::spirit::iterator_policies::no_check, boost::spirit::iterator_policies::split_functor_input, boost::spirit::iterator_policies::split_std_deque> > > (mp=...)
    at /usr/include/boost/spirit/home/support/iterators/detail/combine_policies.hpp:441
#13 0x0000000000408d7c in boost::spirit::iterator_policies::split_std_deque::unique<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >::increment<boost::spirit::multi_pass<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::default_policy<boost::spirit::iterator_policies::ref_counted, boost::spirit::iterator_policies::no_check, boost::spirit::iterator_policies::split_functor_input, boost::spirit::iterator_policies::split_std_deque> > > (mp=...)
    at /usr/include/boost/spirit/home/support/iterators/detail/split_std_deque_policy.hpp:107
#14 0x0000000000408450 in boost::spirit::multi_pass<std::pair<boost::wave::cpplexer::impl::lex_iterator_functor_shim<boost::wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >, boost::wave::cpplexer::lex_input_interface<boost:---Type <return> to continue, or q <return> to quit---
:wave::cpplexer::lex_token<boost::wave::util::file_position<boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> > > > >*>, boost::spirit::iterator_policies::default_policy<boost::spirit::iterator_policies::ref_counted, boost::spirit::iterator_policies::no_check, boost::spirit::iterator_policies::split_functor_input, boost::spirit::iterator_policies::split_std_deque> >::operator++ (this=0x7fff7d8f66e0)
    at /usr/include/boost/spirit/home/support/iterators/multi_pass.hpp:119
#15 0x000000000040680e in strip_comments (input="aaa bbb /*cccc*/ ddd // eee") at test.cpp:23
#16 0x0000000000406927 in main () at test.cpp:37

并修复了以前的运行时错误。 现在，我得到了一个不同的运行时错误：

#0  0x0000000000406ff8 in std::char_traits<char>::length (__s=0x0) at /usr/include/c++/4.9/bits/char_traits.h:263
#1  0x0000000000408504 in boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> >::flex_string (this=0x7ffee3d536a0, s=0x0, a=...)
    at /usr/include/boost/wave/util/flex_string.hpp:1502
#2  0x000000000040693f in strip_comments (input="aaa bbb /*cccc*/ ddd // eee") at test.cpp:16
#3  0x0000000000406bf0 in main () at test.cpp:37

std:：char_traits:：length（uu s=0x0）中的0 0x0000000000406ff8位于/usr/include/c++/4.9/bits/char_traits.h:263 #boost:：wave:：util:：flex_string:：flex_string中的1 0x00000000004804（this=0x7ffee3d536a0，s=0x0，a=…） at/usr/include/boost/wave/util/flex_string.hpp:1502 #测试时带注释的2 0x000000000040693f（输入=“aaa bbb/*cccc*/ddd//eee”）。cpp:16 #测试时主（）中有3 0x0000000000406bf0。cpp:37 我捕捉到了一般的例外情况，并试图通过以下方式展示它：

std::cout << "Error occurred: " << ex.what() << std::endl;

---

std:：cout
boost
喜欢异常编程。意义异常被用来提出错误和警告……我讨厌这样，但是如果你使用那些神奇的C++库，你就需要接受它。如果不小心抓住异常，异常会导致“崩溃”，如下所示：

std::string strip_comments(std::string const& input)
{
    std::string output;
    typedef boost::wave::cpplexer::lex_token<> token_type;
    typedef boost::wave::cpplexer::lex_iterator<token_type> lexer_type;
    typedef token_type::position_type position_type;

    boost::wave::util::file_position_type current_position; // for error reporting

    try
    {
        position_type pos;

        lexer_type it = lexer_type(input.begin(), input.end(), pos, 
            boost::wave::language_support(
            boost::wave::support_cpp|boost::wave::support_option_long_long));
    lexer_type end = lexer_type();

        for (;it != end; ++it)
        {
            current_position = (*it).get_position();  // for error reporting

            if (*it != boost::wave::T_CCOMMENT
             && *it != boost::wave::T_CPPCOMMENT)
            {
                output += std::string(it->get_value().begin(), it->get_value().end());
            }
        }            
    }
    catch (boost::wave::cpplexer::lexing_exception const& e) {
        // some lexing error
        std::cerr
            << e.file_name() << "(" << e.line_no() << "): "
            << e.description() << std::endl;
    }
    catch (std::exception const& e) {
        // use last recognized token to retrieve the error position
        std::cerr
            << current_position.get_file()
            << "(" << current_position.get_line() << "): "
            << "exception caught: " << e.what()
            << std::endl;
    }
    catch (...) {
        // use last recognized token to retrieve the error position
        std::cerr
            << current_position.get_file()
            << "(" << current_position.get_line() << "): "
            << "unexpected exception caught." << std::endl;
    }  
    return output;
}

std:：string strip\u注释（std:：string const&input）
{
std：：字符串输出；
typedef boost:：wave:：cpplexer:：lex_-token_-type；
typedef boost:：wave:：cpplexer:：lex_迭代器lexer_type；
typedef token_type:：position_type position_type；
boost:：wave:：util:：file_position_type current_position；//用于错误报告
尝试
{
位置\ U型位置；
lexer\u type it=lexer\u type（input.begin（），input.end（），pos，
boost:：wave:：语言支持(
boost:：wave:：support_cpp | boost:：wave:：support_option_long_long)；
lexer_type end=lexer_type（）；
for（；it！=end；++it）
{
当前位置=（*it）.get_position（）；//用于错误报告
如果（*it！=boost:：wave:：T\u cMont
&&*it！=boost:：wave:：T_（注释）
{
output+=std:：string（it->get_value（）.begin（），it->get_value（）.end（））；
}
}            
}
捕获（boost:：wave:：cpplexer:：lexing_异常const&e）{
//一些词法错误
标准：cerr
当你调试这个程序时，你得到了什么结果？请与我们分享你的发现好吗？@YePhIcK，我把GDB生成的回溯告诉你非常感谢。除了初始化
pos
，还有什么问题吗？两个代码看起来很相似。很高兴这有帮助（它让我发现了这个我不知道的
boost
库…）。实际上，没有必要初始化
pos
，它的默认值是0。只有
try/catch
丢失。如果这能解决你的问题，请投赞成票！我想知道。对于
“aaa bbb/*cccc*/\n ddd//eee\nfffff\n”
作为输入，输出是
“aaa bbb\n ddd fffff\n”
而不是
“aaa bbb\n ddd\nfffff\n”
看起来像是另一个问题（
\n
被视为
//eee
注释的一部分）。顺便说一句，使用这个字符串示例eas输入，初始化
pos
到
0
会导致核心转储。可能最好让它自己初始化（默认构造函数）。我编辑了我的帖子以反映这一点。
#0  0x0000000000406ff8 in std::char_traits<char>::length (__s=0x0) at /usr/include/c++/4.9/bits/char_traits.h:263
#1  0x0000000000408504 in boost::wave::util::flex_string<char, std::char_traits<char>, std::allocator<char>, boost::wave::util::CowString<boost::wave::util::AllocatorStringStorage<char, std::allocator<char> >, char*> >::flex_string (this=0x7ffee3d536a0, s=0x0, a=...)
    at /usr/include/boost/wave/util/flex_string.hpp:1502
#2  0x000000000040693f in strip_comments (input="aaa bbb /*cccc*/ ddd // eee") at test.cpp:16
#3  0x0000000000406bf0 in main () at test.cpp:37

std::cout << "Error occurred: " << ex.what() << std::endl;

std::string strip_comments(std::string const& input)
{
    std::string output;
    typedef boost::wave::cpplexer::lex_token<> token_type;
    typedef boost::wave::cpplexer::lex_iterator<token_type> lexer_type;
    typedef token_type::position_type position_type;

    boost::wave::util::file_position_type current_position; // for error reporting

    try
    {
        position_type pos;

        lexer_type it = lexer_type(input.begin(), input.end(), pos, 
            boost::wave::language_support(
            boost::wave::support_cpp|boost::wave::support_option_long_long));
    lexer_type end = lexer_type();

        for (;it != end; ++it)
        {
            current_position = (*it).get_position();  // for error reporting

            if (*it != boost::wave::T_CCOMMENT
             && *it != boost::wave::T_CPPCOMMENT)
            {
                output += std::string(it->get_value().begin(), it->get_value().end());
            }
        }            
    }
    catch (boost::wave::cpplexer::lexing_exception const& e) {
        // some lexing error
        std::cerr
            << e.file_name() << "(" << e.line_no() << "): "
            << e.description() << std::endl;
    }
    catch (std::exception const& e) {
        // use last recognized token to retrieve the error position
        std::cerr
            << current_position.get_file()
            << "(" << current_position.get_line() << "): "
            << "exception caught: " << e.what()
            << std::endl;
    }
    catch (...) {
        // use last recognized token to retrieve the error position
        std::cerr
            << current_position.get_file()
            << "(" << current_position.get_line() << "): "
            << "unexpected exception caught." << std::endl;
    }  
    return output;
}