Re: [Boost-Users] problem with c_regex_traits.cpp

From: John Maddock (john_maddock_at_[hidden])
Date: 2002-05-28 05:42:48

> i have problems with the file c_regex_traits.cpp. I work under CodeWarrior
> 6/7 with a Macintosh.
> These problem ist with boost 1.25.1,1.26.
>
> template <class charT>
> unsigned int BOOST_REGEX_CALL re_get_message(charT* buf, unsigned int
> len, unsigned int id)
> {
>     unsigned int size = _re_get_message((char*)0, 0, id);
>     if(len < size)
>         return size;
>     boost::scoped_array<char> cb(new char[size]);
>     _re_get_message(cb.get(), size, id);
>     size = boost::c_regex_traits<wchar_t>::strwiden(buf, len, cb.get());
>     return size;
> }
>
> inline unsigned int BOOST_REGEX_CALL re_get_message(char* buf, unsigned
> int len, unsigned int id)
> {
>     return _re_get_message(buf, len, id);
> }
>
> Is that a known problem? Do you know a workaround?
> (Renaming one of the 're_get_message()' functions does
> the job, but I'm not sure about the implications.)

I've had a chance to experiment a little with this - if BOOST_NO_WREGEX is
defined (i.e. wide character support is disabled), then removing the
template version of re_get_message is harmless (and may therefore be the fix
that you are looking for).  If BOOST_NO_WREGEX is not defined, then
obviously this won't work - so that being the case, what happens if you
surround the definition of

template <class charT>
unsigned int BOOST_REGEX_CALL re_get_message(charT* buf, unsigned int len,
unsigned int id)

with

#ifndef BOOST_NO_WREGEX
...
#endif

regards,

John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/index.htm