Add module support and tests. (#174)

test/module/regex_split_example_1.cpp

@@ -0,0 +1,69 @@
+/*
+ *
+ * Copyright (c) 1998-2022
+ * John Maddock
+ *
+ * Use, modification and distribution are subject to the 
+ * Boost Software License, Version 1.0. (See accompanying file 
+ * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ *
+ */
+
+ /*
+  *   LOCATION:    see http://www.boost.org for most recent version.
+  *   FILE         regex_split_example_1.cpp
+  *   VERSION      see <boost/version.hpp>
+  *   DESCRIPTION: regex_split example: split a string into tokens.
+  */
+
+
+#if (defined(__cpp_lib_modules) || (defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 193833135))) && !defined(TEST_HEADERS)
+import std;
+#elif defined(MSVC_EXPERIMENTAL_STD_MODULE) && !defined(TEST_HEADERS)
+Simport std.core;
+#else
+#include <list>
+#include <string>
+#include <iostream>
+#endif
+
+#ifdef TEST_HEADERS
+#include <boost/regex.hpp>
+#else
+import boost.regex;
+#endif
+
+unsigned tokenise(std::list<std::string>& l, std::string& s)
+{
+   return boost::regex_split(std::back_inserter(l), s);
+}
+
+using namespace std;
+
+int main(int argc, const char*[])
+{
+   string s;
+   list<string> l;
+   do{
+      if(argc == 1)
+      {
+         cout << "Enter text to split (or \"quit\" to exit): ";
+         getline(cin, s);
+         if(s == "quit") break;
+      }
+      else
+         s = "This is a string of tokens";
+      unsigned result = tokenise(l, s);
+      cout << result << " tokens found" << endl;
+      cout << "The remaining text is: \"" << s << "\"" << endl;
+      while(l.size())
+      {
+         s = *(l.begin());
+         l.pop_front();
+         cout << s << endl;
+      }
+   }while(argc == 1);
+   return 0;
+}
+
+