Initial commit of v4 of boost.regex on regex-4 branch

[SVN r18128]

example/jgrep/main.cpp

@@ -34,7 +34,11 @@ using std::endl;
 #  pragma hrdstop
 #endif
 
+#ifdef BOOST_REGEX_V3
 #include <boost/regex/v3/fileiter.hpp>
+#else
+#include <boost/regex/v4/fileiter.hpp>
+#endif
 #include "jgrep.h"
 
 #ifndef JM_ALGO_INCLUDED
@@ -165,6 +169,8 @@ void parse_switch(const char* flag)
    }
 }
 
+using namespace boost;
+
 void HandleFile(const char* wild)
 {
    using namespace boost;