diff --git a/include/boost/regex/v4/basic_regex_parser.hpp b/include/boost/regex/v4/basic_regex_parser.hpp
index 61be3ccf..01a97b52 100644
--- a/include/boost/regex/v4/basic_regex_parser.hpp
+++ b/include/boost/regex/v4/basic_regex_parser.hpp
@@ -1342,6 +1342,10 @@ bool valid_value(charT c, int v)
 template <class charT, class traits>
 charT basic_regex_parser<charT, traits>::unescape_character()
 {
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4127)
+#endif
    charT result(0);
    if(m_position == m_end)
    {
@@ -1494,6 +1498,9 @@ charT basic_regex_parser<charT, traits>::unescape_character()
    }
    ++m_position;
    return result;
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
 }
 
 template <class charT, class traits>
diff --git a/include/boost/regex/v4/instances.hpp b/include/boost/regex/v4/instances.hpp
index 4a8d1e64..b9898cb0 100644
--- a/include/boost/regex/v4/instances.hpp
+++ b/include/boost/regex/v4/instances.hpp
@@ -167,10 +167,7 @@ template BOOST_REGEX_DECL void BOOST_REGEX_CALL
 
 namespace re_detail{
 template BOOST_REGEX_DECL void perl_matcher<BOOST_REGEX_CHAR_T const *, match_results< const BOOST_REGEX_CHAR_T* >::allocator_type BOOST_REGEX_TRAITS_T >::construct_init(
-      BOOST_REGEX_CHAR_T const * first, BOOST_REGEX_CHAR_T const * end, 
-      match_results<BOOST_REGEX_CHAR_T const *>& what, 
-      const basic_regex<BOOST_REGEX_CHAR_T BOOST_REGEX_TRAITS_T >& e,
-      match_flag_type f);
+      const basic_regex<BOOST_REGEX_CHAR_T BOOST_REGEX_TRAITS_T >& e, match_flag_type f);
 template BOOST_REGEX_DECL bool perl_matcher<BOOST_REGEX_CHAR_T const *, match_results< const BOOST_REGEX_CHAR_T* >::allocator_type BOOST_REGEX_TRAITS_T >::match();
 template BOOST_REGEX_DECL bool perl_matcher<BOOST_REGEX_CHAR_T const *, match_results< const BOOST_REGEX_CHAR_T* >::allocator_type BOOST_REGEX_TRAITS_T >::find();
 } // namespace
@@ -186,10 +183,7 @@ template BOOST_REGEX_DECL void BOOST_REGEX_CALL
 
 namespace re_detail{
 template BOOST_REGEX_DECL void perl_matcher<std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator, match_results< std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator >::allocator_type, boost::regex_traits<BOOST_REGEX_CHAR_T > >::construct_init(
-      std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator first, std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator end, 
-      match_results<std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator>& what, 
-      const basic_regex<BOOST_REGEX_CHAR_T>& e,
-      match_flag_type f);
+      const basic_regex<BOOST_REGEX_CHAR_T>& e, match_flag_type f);
 template BOOST_REGEX_DECL bool perl_matcher<std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator, match_results< std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator >::allocator_type, boost::regex_traits<BOOST_REGEX_CHAR_T > >::match();
 template BOOST_REGEX_DECL bool perl_matcher<std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator, match_results< std::basic_string<BOOST_REGEX_CHAR_T>::const_iterator >::allocator_type, boost::regex_traits<BOOST_REGEX_CHAR_T > >::find();
 } // namespace
diff --git a/include/boost/regex/v4/perl_matcher.hpp b/include/boost/regex/v4/perl_matcher.hpp
index 39d7f37c..82f8a26d 100644
--- a/include/boost/regex/v4/perl_matcher.hpp
+++ b/include/boost/regex/v4/perl_matcher.hpp
@@ -338,10 +338,7 @@ public:
    { m_match_flags &= ~f; }
 
 private:
-   void construct_init(BidiIterator first, BidiIterator end, 
-      match_results<BidiIterator, Allocator>& what, 
-      const basic_regex<char_type, traits>& e,
-      match_flag_type f);
+   void construct_init(const basic_regex<char_type, traits>& e, match_flag_type f);
    bool find_imp();
    bool match_imp();
 #ifdef BOOST_REGEX_HAS_MS_STACK_GUARD
diff --git a/include/boost/regex/v4/perl_matcher_common.hpp b/include/boost/regex/v4/perl_matcher_common.hpp
index dd63e98e..af2139b6 100644
--- a/include/boost/regex/v4/perl_matcher_common.hpp
+++ b/include/boost/regex/v4/perl_matcher_common.hpp
@@ -41,14 +41,11 @@ perl_matcher<BidiIterator, Allocator, traits>::perl_matcher(BidiIterator first,
       position(first), backstop(b), re(e), traits_inst(e.get_traits()), 
       m_independent(false), next_count(&rep_obj), rep_obj(&next_count)
 {
-   construct_init(first, last, what, e, f);
+   construct_init(e, f);
 }
 
 template <class BidiIterator, class Allocator, class traits>
-void perl_matcher<BidiIterator, Allocator, traits>::construct_init(BidiIterator first, BidiIterator end, 
-   match_results<BidiIterator, Allocator>& what, 
-   const basic_regex<char_type, traits>& e,
-   match_flag_type f)
+void perl_matcher<BidiIterator, Allocator, traits>::construct_init(const basic_regex<char_type, traits>& e, match_flag_type f)
 { 
    typedef typename regex_iterator_traits<BidiIterator>::iterator_category category;
    
diff --git a/include/boost/regex/v4/perl_matcher_recursive.hpp b/include/boost/regex/v4/perl_matcher_recursive.hpp
index c0626ebd..3a763094 100644
--- a/include/boost/regex/v4/perl_matcher_recursive.hpp
+++ b/include/boost/regex/v4/perl_matcher_recursive.hpp
@@ -510,7 +510,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_char_repeat()
    if(::boost::is_random_access_iterator<BidiIterator>::value)
    {
       BidiIterator end = position;
-      std::advance(end, (std::min)((unsigned)::boost::re_detail::distance(position, last), desired));
+      std::advance(end, (std::min)((std::size_t)::boost::re_detail::distance(position, last), desired));
       BidiIterator origin(position);
       while((position != end) && (traits_inst.translate(*position, icase) == what))
       {
@@ -599,7 +599,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_set_repeat()
    if(::boost::is_random_access_iterator<BidiIterator>::value)
    {
       BidiIterator end = position;
-      std::advance(end, (std::min)((unsigned)::boost::re_detail::distance(position, last), desired));
+      std::advance(end, (std::min)((std::size_t)::boost::re_detail::distance(position, last), desired));
       BidiIterator origin(position);
       while((position != end) && map[static_cast<unsigned char>(traits_inst.translate(*position, icase))])
       {
@@ -689,7 +689,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_long_set_repeat()
    if(::boost::is_random_access_iterator<BidiIterator>::value)
    {
       BidiIterator end = position;
-      std::advance(end, (std::min)((unsigned)::boost::re_detail::distance(position, last), desired));
+      std::advance(end, (std::min)((std::size_t)::boost::re_detail::distance(position, last), desired));
       BidiIterator origin(position);
       while((position != end) && (position != re_is_set_member(position, last, set, re.get_data(), icase)))
       {