Update documentation

doc/smart_ptr/changelog.adoc

@@ -1,5 +1,5 @@
 ////
-Copyright 2019 Peter Dimov
+Copyright 2019, 2020 Peter Dimov
 
 Distributed under the Boost Software License, Version 1.0.
 
@@ -17,6 +17,10 @@ http://www.boost.org/LICENSE_1_0.txt
 
 * Added `owner_equals` to `shared_ptr`, `weak_ptr`, `local_shared_ptr`
 * Added `owner_equal_to`
+* Added `std::hash` specializations for `shared_ptr`, `local_shared_ptr`
+* Added `owner_hash_value` to `shared_ptr`, `weak_ptr`
+* Added `boost::hash` support and `std::hash`, `std::equal_to`
+  specializations for `weak_ptr`
 
 ## Changes in 1.72.0
 

doc/smart_ptr/shared_ptr.adoc

@@ -183,6 +183,8 @@ namespace boost {
 
     template<class Y> bool owner_equals(shared_ptr<Y> const & r) const noexcept;
     template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -677,6 +679,17 @@ template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
 Returns::
   `true` if and only if `*this` and `r` share ownership or are both empty.
 
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
+
 ## Free Functions
 
 ### comparison

doc/smart_ptr/weak_ptr.adoc

@@ -115,6 +115,8 @@ namespace boost {
 
     template<class Y> bool owner_equals( weak_ptr<Y> const & r ) const noexcept;
     template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -298,6 +300,17 @@ template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
 Returns::
   `true` if and only if `*this` and `r` share ownership or are both empty.
 
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
+
 ## Free Functions
 
 ### comparison