[Boost-users] [boost-users][regex] Failure with minimal example on GCC 4.3.1

From: Darren Garvey (lists.drrngrvy_at_[hidden])
Date: 2007-11-21 22:01:01

I'm not sure if I'm missing something here, but I think this is a bug.

I'm trying to compile the following with gcc4.1.3 on Ubuntu 7.10:
$ g++ -v
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--with-gxx-include-dir=/usr/include/c++/4.1.3
--program-suffix=-4.1--enable-__cxa_atexit --enable-clocale=gnu
--enable-libstdcxx-debug
--enable-mpfr --enable-checking=release i486-linux-gnu
Thread model: posix
gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)

#include <boost/regex.hpp>

int main()
{
  using namespace boost;

  std::string str;
  regex re(".");
  cmatch what;

  regex_match(str, what, re);

  return 0;
}

GCC doesn't manage to find the right overload of regex_match and says only
this:

lala.cpp: In function 'int main()':
lala.cpp:11: error: no matching function for call to
'regex_match(std::string&, boost::cmatch&, boost::regex&)'
/usr/local/src/boost/trunk/boost/regex/v4/regex_match.hpp:80: note:
candidates are: bool boost::regex_match(const std::basic_string<charT, ST,
SA>&, boost::match_results<typename std::basic_string<charT, ST,
SA>::const_iterator, Allocator>&, const boost::basic_regex<charT, traits>&,
boost::regex_constants::match_flag_type) [with ST = std::char_traits<char>,
SA = std::allocator<char>, Allocator = std::allocator<boost::sub_match<const
char*> >, charT = char, traits = boost::regex_traits<char,
boost::cpp_regex_traits<char> >]

It compiles fine if you instead pass str.c_str() as the first argument. On
the other hand, If you explicitly qualify the regex types with boost::, gcc
spews out the attached misery-ball. AFAIK, these all work on msvc9.

Is the example above supposed to work?

Cheers,
Darren