diff --git a/include/boost/utility/base_from_member.hpp b/include/boost/utility/base_from_member.hpp
index fc0e13c..604541d 100644
--- a/include/boost/utility/base_from_member.hpp
+++ b/include/boost/utility/base_from_member.hpp
@@ -47,11 +47,11 @@
 //         {}
 // This macro should only persist within this file.
 
-#define BOOST_PRIVATE_CTR_DEF( z, n, data )                            \
-    template < BOOST_PP_ENUM_PARAMS(n, typename T) >                   \
-    explicit base_from_member( BOOST_PP_ENUM_BINARY_PARAMS(n, T, x) )  \
-        : member( BOOST_PP_ENUM_PARAMS(n, x) )                         \
-        {}                                                             \
+#define BOOST_PRIVATE_CTR_DEF( z, n, data )                   \
+    template < BOOST_PP_ENUM_PARAMS(n, typename T) >          \
+    base_from_member( BOOST_PP_ENUM_BINARY_PARAMS(n, T, x) )  \
+        : member( BOOST_PP_ENUM_PARAMS(n, x) )                \
+        {}                                                    \
     /**/
 
 
@@ -142,7 +142,8 @@ protected:
         : member()
         {}
 
-    BOOST_PP_REPEAT_FROM_TO( 1, BOOST_PP_INC(BOOST_BASE_FROM_MEMBER_MAX_ARITY),
+    template < typename T0 > explicit base_from_member( T0 x0 ) : member( x0 ) {}
+    BOOST_PP_REPEAT_FROM_TO( 2, BOOST_PP_INC(BOOST_BASE_FROM_MEMBER_MAX_ARITY),
      BOOST_PRIVATE_CTR_DEF, _ )
 #endif
 
diff --git a/include/boost/utility/string_ref.hpp b/include/boost/utility/string_ref.hpp
index 8707157..447d3cc 100644
--- a/include/boost/utility/string_ref.hpp
+++ b/include/boost/utility/string_ref.hpp
@@ -57,26 +57,37 @@ namespace boost {
         static BOOST_CONSTEXPR_OR_CONST size_type npos = size_type(-1);
 
         // construct/copy
-        BOOST_CONSTEXPR basic_string_ref ()
+        BOOST_CONSTEXPR basic_string_ref () BOOST_NOEXCEPT
             : ptr_(NULL), len_(0) {}
 
-        BOOST_CONSTEXPR basic_string_ref (const basic_string_ref &rhs)
+        // by defaulting these functions, basic_string_ref becomes
+        //  trivially copy/move constructible.
+        BOOST_CONSTEXPR basic_string_ref (const basic_string_ref &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
+            = default;
+#else
             : ptr_(rhs.ptr_), len_(rhs.len_) {}
+#endif
 
-        basic_string_ref& operator=(const basic_string_ref &rhs) {
+        basic_string_ref& operator=(const basic_string_ref &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
+            = default;
+#else
+            {
             ptr_ = rhs.ptr_;
             len_ = rhs.len_;
             return *this;
             }
+#endif
 
-        basic_string_ref(const charT* str)
+        basic_string_ref(const charT* str) BOOST_NOEXCEPT
             : ptr_(str), len_(traits::length(str)) {}
 
         template<typename Allocator>
         basic_string_ref(const std::basic_string<charT, traits, Allocator>& str)
             : ptr_(str.data()), len_(str.length()) {}
 
-        BOOST_CONSTEXPR basic_string_ref(const charT* str, size_type len)
+        BOOST_CONSTEXPR basic_string_ref(const charT* str, size_type len) BOOST_NOEXCEPT
             : ptr_(str), len_(len) {}
 
 #ifndef BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
@@ -174,13 +185,13 @@ namespace boost {
         size_type rfind(basic_string_ref s) const {
             const_reverse_iterator iter = std::search ( this->crbegin (), this->crend (),
                                                 s.crbegin (), s.crend (), traits::eq );
-            return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter );
+            return iter == this->crend () ? npos : (std::distance(iter, this->crend()) - s.size());
             }
 
         size_type rfind(charT c) const {
             const_reverse_iterator iter = std::find_if ( this->crbegin (), this->crend (),
                                     detail::string_ref_traits_eq<charT, traits> ( c ));
-            return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter );
+            return iter == this->crend () ? npos : (this->size() - 1 - std::distance(this->crbegin(), iter));
             }
 
         size_type find_first_of(charT c) const { return  find (c); }
@@ -195,7 +206,7 @@ namespace boost {
         size_type find_last_of(basic_string_ref s) const {
             const_reverse_iterator iter = std::find_first_of
                 ( this->crbegin (), this->crend (), s.cbegin (), s.cend (), traits::eq );
-            return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter);
+            return iter == this->crend () ? npos : (this->size() - 1 - std::distance(this->crbegin(), iter));
             }
 
         size_type find_first_not_of(basic_string_ref s) const {
@@ -212,21 +223,17 @@ namespace boost {
 
         size_type find_last_not_of(basic_string_ref s) const {
             const_reverse_iterator iter = find_not_of ( this->crbegin (), this->crend (), s );
-            return iter == this->crend () ? npos : reverse_distance ( this->crbegin (), iter );
+            return iter == this->crend () ? npos : (this->size() - 1 - std::distance(this->crbegin(), iter));
             }
 
         size_type find_last_not_of(charT c) const {
             for ( const_reverse_iterator iter = this->crbegin (); iter != this->crend (); ++iter )
                 if ( !traits::eq ( c, *iter ))
-                    return reverse_distance ( this->crbegin (), iter );
+                    return this->size() - 1 - std::distance(this->crbegin(), iter);
             return npos;
             }
 
     private:
-        template <typename r_iter>
-        size_type reverse_distance ( r_iter first, r_iter last ) const {
-            return len_ - 1 - std::distance ( first, last );
-            }
 
         template <typename Iterator>
         Iterator find_not_of ( Iterator first, Iterator last, basic_string_ref s ) const {
@@ -405,7 +412,7 @@ namespace boost {
     namespace detail {
 
         template<class charT, class traits>
-        inline void insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
+        inline void sr_insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
             enum { chunk_size = 8 };
             charT fill_chars[chunk_size];
             std::fill_n(fill_chars, static_cast< std::size_t >(chunk_size), os.fill());
@@ -416,19 +423,19 @@ namespace boost {
             }
 
         template<class charT, class traits>
-        void insert_aligned(std::basic_ostream<charT, traits>& os, const basic_string_ref<charT,traits>& str) {
+        void sr_insert_aligned(std::basic_ostream<charT, traits>& os, const basic_string_ref<charT,traits>& str) {
             const std::size_t size = str.size();
             const std::size_t alignment_size = static_cast< std::size_t >(os.width()) - size;
             const bool align_left = (os.flags() & std::basic_ostream<charT, traits>::adjustfield) == std::basic_ostream<charT, traits>::left;
             if (!align_left) {
-                detail::insert_fill_chars(os, alignment_size);
+                detail::sr_insert_fill_chars(os, alignment_size);
                 if (os.good())
                     os.write(str.data(), size);
                 }
             else {
                 os.write(str.data(), size);
                 if (os.good())
-                    detail::insert_fill_chars(os, alignment_size);
+                    detail::sr_insert_fill_chars(os, alignment_size);
                 }
             }
 
@@ -444,7 +451,7 @@ namespace boost {
             if (w <= size)
                 os.write(str.data(), size);
             else
-                detail::insert_aligned(os, str);
+                detail::sr_insert_aligned(os, str);
             os.width(0);
             }
         return os;
diff --git a/include/boost/utility/string_view.hpp b/include/boost/utility/string_view.hpp
index 9de32cc..e3cb0ae 100644
--- a/include/boost/utility/string_view.hpp
+++ b/include/boost/utility/string_view.hpp
@@ -65,14 +65,25 @@ namespace boost {
       BOOST_CONSTEXPR basic_string_view() BOOST_NOEXCEPT
         : ptr_(NULL), len_(0) {}
 
+      // by defaulting these functions, basic_string_ref becomes
+      //  trivially copy/move constructible.
       BOOST_CONSTEXPR basic_string_view(const basic_string_view &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
+        = default;
+#else
         : ptr_(rhs.ptr_), len_(rhs.len_) {}
+#endif
 
-      basic_string_view& operator=(const basic_string_view &rhs) BOOST_NOEXCEPT {
+      basic_string_view& operator=(const basic_string_view &rhs) BOOST_NOEXCEPT
+#ifndef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
+            = default;
+#else
+        {
         ptr_ = rhs.ptr_;
         len_ = rhs.len_;
         return *this;
         }
+#endif
 
       template<typename Allocator>
         basic_string_view(const std::basic_string<charT, traits,
@@ -244,7 +255,7 @@ namespace boost {
               pos = len_ - s.len_;
             if (s.len_ == 0u)     // an empty string is always found
               return pos;
-            for (const charT* cur = ptr_ + pos;; --cur) {
+            for (const charT* cur = ptr_ + pos; ; --cur) {
                 if (traits::compare(cur, s.ptr_, s.len_) == 0)
                   return cur - ptr_;
                 if (cur == ptr_)
@@ -311,7 +322,7 @@ namespace boost {
         //  find_last_not_of
         BOOST_CXX14_CONSTEXPR size_type find_last_not_of(basic_string_view s, size_type pos = npos) const BOOST_NOEXCEPT {
             if (pos >= len_)
-              pos = len_ - 1;;
+              pos = len_ - 1;
             if (s.len_ == 0u)
               return pos;
             pos = len_ - (pos+1);
@@ -538,7 +549,7 @@ namespace boost {
     namespace detail {
 
         template<class charT, class traits>
-        inline void insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
+        inline void sv_insert_fill_chars(std::basic_ostream<charT, traits>& os, std::size_t n) {
             enum { chunk_size = 8 };
             charT fill_chars[chunk_size];
             std::fill_n(fill_chars, static_cast< std::size_t >(chunk_size), os.fill());
@@ -549,19 +560,19 @@ namespace boost {
             }
 
         template<class charT, class traits>
-        void insert_aligned(std::basic_ostream<charT, traits>& os, const basic_string_view<charT,traits>& str) {
+        void sv_insert_aligned(std::basic_ostream<charT, traits>& os, const basic_string_view<charT,traits>& str) {
             const std::size_t size = str.size();
             const std::size_t alignment_size = static_cast< std::size_t >(os.width()) - size;
             const bool align_left = (os.flags() & std::basic_ostream<charT, traits>::adjustfield) == std::basic_ostream<charT, traits>::left;
             if (!align_left) {
-                detail::insert_fill_chars(os, alignment_size);
+                detail::sv_insert_fill_chars(os, alignment_size);
                 if (os.good())
                     os.write(str.data(), size);
                 }
             else {
                 os.write(str.data(), size);
                 if (os.good())
-                    detail::insert_fill_chars(os, alignment_size);
+                    detail::sv_insert_fill_chars(os, alignment_size);
                 }
             }
 
@@ -578,7 +589,7 @@ namespace boost {
             if (w <= size)
                 os.write(str.data(), size);
             else
-                detail::insert_aligned(os, str);
+                detail::sv_insert_aligned(os, str);
             os.width(0);
             }
         return os;