Update preprocessor conditions to test for the MS STL, rather than specific compilers. Fixes #219.

src/wide_posix_api.cpp

@@ -169,7 +169,7 @@ BOOST_REGEX_DECL regsize_t BOOST_REGEX_CCALL regerrorW(int code, const regex_tW*
       {
          result = std::wcslen(wnames[code]) + 1;
          if(buf_size >= result)
-#if (BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(_WIN32_WCE) && !defined(UNDER_CE)) || (defined(BOOST_CLANG) && defined(_MSC_VER))
+#if defined(BOOST_MSSTL_VERSION)
             ::wcscpy_s(buf, buf_size, wnames[code]);
 #else
             std::wcscpy(buf, wnames[code]);
@@ -193,7 +193,7 @@ BOOST_REGEX_DECL regsize_t BOOST_REGEX_CCALL regerrorW(int code, const regex_tW*
             (boost::core::swprintf)(localbuf, 5, L"%d", i);
 #endif
             if(std::wcslen(localbuf) < buf_size)
-#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(_WIN32_WCE) && !defined(UNDER_CE)
+#if defined(BOOST_MSSTL_VERSION)
                ::wcscpy_s(buf, buf_size, localbuf);
 #else
                std::wcscpy(buf, localbuf);
@@ -207,7 +207,7 @@ BOOST_REGEX_DECL regsize_t BOOST_REGEX_CCALL regerrorW(int code, const regex_tW*
       (boost::core::swprintf)(localbuf, 5, L"%d", 0);
 #endif
       if(std::wcslen(localbuf) < buf_size)
-#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(_WIN32_WCE) && !defined(UNDER_CE)
+#if defined(BOOST_MSSTL_VERSION)
          ::wcscpy_s(buf, buf_size, localbuf);
 #else
          std::wcscpy(buf, localbuf);