Remove dependency on boost::mpl from 'clamp' and 'is_sorted'

Author: mclow

Diff for: include/boost/algorithm/clamp.hpp

@@ -26,14 +26,14 @@
 #include <boost/config.hpp>
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
-#include <boost/mpl/identity.hpp>      // for identity
-#include <boost/utility/enable_if.hpp> // for boost::disable_if
+#include <boost/type_traits/type_identity.hpp> // for boost::type_identity
+#include <boost/utility/enable_if.hpp>         // for boost::disable_if
 
 namespace boost { namespace algorithm {
 
 /// \fn clamp ( T const& val, 
-///               typename boost::mpl::identity<T>::type const & lo, 
-///               typename boost::mpl::identity<T>::type const & hi, Pred p )
+///               typename boost::type_identity<T>::type const & lo, 
+///               typename boost::type_identity<T>::type const & hi, Pred p )
 /// \return the value "val" brought into the range [ lo, hi ]
 ///     using the comparison predicate p.
 ///     If p ( val, lo ) return lo.
@@ -48,17 +48,17 @@ namespace boost { namespace algorithm {
 ///
   template<typename T, typename Pred> 
   BOOST_CXX14_CONSTEXPR T const & clamp ( T const& val, 
-    typename boost::mpl::identity<T>::type const & lo, 
-    typename boost::mpl::identity<T>::type const & hi, Pred p )
+    typename boost::type_identity<T>::type const & lo, 
+    typename boost::type_identity<T>::type const & hi, Pred p )
   {
 //    assert ( !p ( hi, lo ));    // Can't assert p ( lo, hi ) b/c they might be equal
     return p ( val, lo ) ? lo : p ( hi, val ) ? hi : val;
   } 
 
 
 /// \fn clamp ( T const& val, 
-///               typename boost::mpl::identity<T>::type const & lo, 
-///               typename boost::mpl::identity<T>::type const & hi )
+///               typename boost::identity<T>::type const & lo, 
+///               typename boost::identity<T>::type const & hi )
 /// \return the value "val" brought into the range [ lo, hi ].
 ///     If the value is less than lo, return lo.
 ///     If the value is greater than "hi", return hi.
@@ -70,8 +70,8 @@ namespace boost { namespace algorithm {
 ///
   template<typename T> 
   BOOST_CXX14_CONSTEXPR T const& clamp ( const T& val, 
-    typename boost::mpl::identity<T>::type const & lo, 
-    typename boost::mpl::identity<T>::type const & hi )
+    typename boost::type_identity<T>::type const & lo, 
+    typename boost::type_identity<T>::type const & hi )
   {
     return boost::algorithm::clamp ( val, lo, hi, std::less<T>());
   } 

Diff for: include/boost/algorithm/cxx11/is_sorted.hpp

@@ -22,7 +22,7 @@
 
 #include <boost/utility/enable_if.hpp>
 #include <boost/type_traits/is_same.hpp>
-#include <boost/mpl/identity.hpp>
+#include <boost/type_traits/type_identity.hpp> // for boost::type_identity
 
 namespace boost { namespace algorithm {
 
@@ -127,7 +127,7 @@ namespace boost { namespace algorithm {
 /// \param p     A binary predicate that returns true if two elements are ordered.
 ///
     template <typename R, typename Pred>
-    BOOST_CXX14_CONSTEXPR typename boost::lazy_disable_if_c< boost::is_same<R, Pred>::value, boost::mpl::identity<bool> >::type
+    BOOST_CXX14_CONSTEXPR typename boost::lazy_disable_if_c< boost::is_same<R, Pred>::value, boost::type_identity<bool> >::type
     is_sorted ( const R &range, Pred p )
     {
         return boost::algorithm::is_sorted ( boost::begin ( range ), boost::end ( range ), p );