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1408

answers:

2

i'm trying to use boost regex within my program the problem is i get this error... the only installation step i did was to add: "C:\Program Files\boost\boost_1_42" into the Additional Include Directories...

i'm using VS2008...

trying to implement this:

#include <iostream>
#include <string>
#include <boost/regex.hpp>

using namespace std;

int main( ) {

   std::string s, sre;
   boost::regex re;
   boost::cmatch matches;

   while(true)
   {
      cout << "Expression: ";
      cin >> sre;
      if (sre == "quit")
      {
         break;
      }

      cout << "String:     ";
      cin >> s;

      try
      {
         // Assignment and construction initialize the FSM used
         // for regexp parsing
         re = sre;
      }
      catch (boost::regex_error& e)
      {
         cout << sre << " is not a valid regular expression: \""
              << e.what() << "\"" << endl;
         continue;
      }
      // if (boost::regex_match(s.begin(), s.end(), re))
      if (boost::regex_match(s.c_str(), matches, re))
      {
         // matches[0] contains the original string.  matches[n]
         // contains a sub_match object for each matching
         // subexpression
         for (int i = 1; i < matches.size(); i++)
         {
            // sub_match::first and sub_match::second are iterators that
            // refer to the first and one past the last chars of the
            // matching subexpression
            string match(matches[i].first, matches[i].second);
            cout << "\tmatches[" << i << "] = " << match << endl;
         }
      }
      else
      {
         cout << "The regexp \"" << re << "\" does not match \"" << s << "\"" << endl;
      }
   }
}

what seems to be the problem ? any additional settings should be made ?

A: 

Have you installed the multithreading debug version of Boost? If not, please do so. Otherwise check your library path (in the project preferences) so that it includes the path to the file mentioned in the error message.

Tronic
+7  A: 

Some Boost libraries have to be built; this is one of them. Here's how you can build them:

Make a new file called boost_build.bat, and inside put:

bjam toolset=msvc-9.0 variant=release threading=multi link=static define=_SECURE_SCL=0 define=_HAS_ITERATOR_DEBUGGING=0
bjam toolset=msvc-9.0 variant=debug threading=multi link=static

Note 9.0 refers to VS 2008. (10.0 for 2010, 8.0 for 2005, 7.1 for 2003, 6.0 for, well, 6.0). Once you've done this:

  1. Extract build_boost.bat to <boost_root>

  2. Go to: <boost_root>\tools\jam And run build_dist.bat

  3. Copy <boost_root>\tools\jam\stage\bin.ntx86\bjam.exe to <boost_root>

  4. Run boost_build.bat

  5. Libraries are located in <boost_root>\stage\lib

Note, this is my own method. I would love if someone chimed in an easier way, or some link from Boost; it seems it's difficult to find proper build instructions from Boost.

Once it's built, make sure you let the compiler know where the libraries are in your VC Directories (the Library Paths); add "<boost_root>\stage\lib".


In the bjam defines, I have _SECURE_SCL=0 _HAS_ITERATOR_DEBUGGING=0 for Release. This disables all iterator checking in Release builds, for a speed improvement.

GMan
still same error...1>LINK : fatal error LNK1104: cannot open file 'libboost_regex-vc90-mt-gd-1_42.lib'did exactly as u said...
kaycee
ok it works... added to the linker "C:\Program Files\boost\boost_1_42\stage\lib\libboost_regex-vc90-mt-gd-1_42.lib"
kaycee
`_HAS_ITERATOR_DEBUGGING` only applies to Debug builds. Regarding `_SECURE_SCL`, though, have you encountered problems mixing libraries that have it enabled with libraries that have it disabled?
James McNellis
@James: Ah, didn't know that about `_HAS...`. And for your second question, I wouldn't know. I disable it in my release builds in things that use Boost, so they match.
GMan
http://connect.microsoft.com/VisualStudio/feedback/details/524141/serious-bug-when-using-secure-scl-0-c
dman
@darid: Thank you; I hadn't seen that (from the link: "Additionally, `_SECURE_SCL` defaults to 0 in release mode in VC10." Wonderful; let's change it _again_ and confuse everyone!) @GMan: As a heads-up concerning `_HAS_ITERATOR_DEBUGGING` (in debug builds only, obviously), there's also a really fun bug in the VC9 `stringstream` implementation when it is disabled (http://connect.microsoft.com/VisualStudio/feedback/details/435483). That bug has caused me ceaseless grief.
James McNellis
It seems the default download contains a boostrap.bat and then after that bjam.exe file which takes care of all the building for us...
Henrik