id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
12960,Line break \R in x-mode,robic0@…,John Maddock,"Bug:  get_escape_R_string()

This function injects whitespace literals in the return string.[[BR]]
This is a problem in x-mode since the whitespace[[BR]]
is ignored when it's re-parsed, which then throws an exception.


--------------------------------
File:  boost\regex\v4\regex_traits_defaults.hpp

Function:  get_escape_R_string()


{{{
template <class charT>
inline const charT* get_escape_R_string()
{
#ifdef BOOST_MSVC
#  pragma warning(push)
#  pragma warning(disable:4309 4245)
#endif

   static const charT e1[] = { '(', '?', '>', '\x0D', '\x0A', '?',
      '|', '[', '\x0A', '\x0B', '\x0C', static_cast<unsigned char>('\x85'), '\\', 'x', '{', '2', '0', '2', '8', '}',
                '\\', 'x', '{', '2', '0', '2', '9', '}', ']', ')', '\0' };
   static const charT e2[] = { '(', '?', '>', '\x0D', '\x0A', '?',
      '|', '[', '\x0A', '\x0B', '\x0C', static_cast<unsigned char>('\x85'), ']', ')', '\0' };

   charT c = static_cast<charT>(0x2029u);
   bool b = (static_cast<unsigned>(c) == 0x2029u);

   return (b ? e1 : e2);
#ifdef BOOST_MSVC
#  pragma warning(pop)
#endif
}

}}}
--------------------------------
Can be fixed by converting the whitespace characters[[BR]]
to hex string literal.


{{{
   static const charT e1[] = { '(', '?', '>', 
      '\\', 'x', '0', 'D', '\\', 'x', '0', 'A', '?',
      '|', '[', 
      '\\', 'x', '0', 'A', '\\', 'x', '0', 'B', '\\', 'x', '0', 'C',
      '\\', 'x', '8', '5', '\\', 'x', '{', '2', '0', '2', '8', '}',
      '\\', 'x', '{', '2', '0', '2', '9', '}', ']', ')', '\0' };
   static const charT e2[] = { '(', '?', '>',
      '\\', 'x', '0', 'D', '\\', 'x', '0', 'A', '?',
      '|', '[',
      '\\', 'x', '0', 'A', '\\', 'x', '0', 'B', '\\', 'x', '0', 'C',
      '\\', 'x', '8', '5', ']', ')', '\0' };

}}}

",Bugs,closed,To Be Determined,regex,Boost 1.61.0,Problem,fixed,line-break,