param of xpressive::sregex_iterator compiler error in VS2012

[wanhihihlo@…]

Windows7 64bit, MS Visual Studio 2012 (VC11), build with 32bit;

I just compiler example code in user's guide, "Find all the sub-strings that match a regex and step through them one at a time" :

std::wstring str( L"This is his face." ); wsregex token = +alnum; wsregex_iterator cur( str.begin(), str.end(), token ); <---error wsregex_iterator end;

for( ; cur != end; ++cur ) {

wsmatch const &what = *cur; std::wcout << what[0] << L'\n';

}

compiler said undeclared identifier of "token" in "wsregex_iterator cur( str.begin(), str.end(), token );" !!!

I changed the var "token" to "tt_k", it report same error still. The sample code compiler OK in VS2010, but fail in VS2012.

[Eric Niebler]

I copied the code exactly as it is from that example, pasted it into a brand new VS2012 project, hit compile, and it worked. For reference, the code is here:

#include <iostream>
#include <boost/xpressive/xpressive.hpp>

using namespace boost::xpressive;

int main()
{
    std::wstring str( L"This is his face." );

    // find a whole word
    wsregex token = +alnum;

    wsregex_iterator cur( str.begin(), str.end(), token );
    wsregex_iterator end;

    for( ; cur != end; ++cur )
    {
        wsmatch const &what = *cur;
        std::wcout << what[0] << L'\n';
    }

    return 0;
}