Merge branch 'develop'

doc/changes.qbk

@@ -201,4 +201,20 @@
   already in place for GCC, and was used when Clang pretends to be GCC,
   but the warning was appearing when running Clang in other contexts.
 
+[h2 Boost 1.67.0]
+
+* Moved library into its own module, `container_hash`.
+* Moved headers for new module name, now at:
+  `<boost/container_hash/hash.hpp>`,
+  `<boost/container_hash/hash_fwd.hpp>`,
+  `<boost/container_hash/extensions.hpp>`.
+* Added forwarding headers to support the old headers locations.
+* Support `std::string_view`, `std::error_code`, `std::error_condition`
+  `std::optional`, `std::variant`, `std::monostate` where available.
+* Update include paths from other Boost libraries.
+* Manually write out tuple overloads, rather than using the
+  preprocessor to generate them. Should improve usability, due
+  to better error messages, and easier debugging.
+* Fix tutorial example ([ticket 11017]).
+
 [endsect]

doc/samples/tutorial.cpp

@@ -0,0 +1,27 @@
+#include <boost/container_hash/hash.hpp>
+#include <vector>
+#include <algorithm>
+#include <iterator>
+#include <cassert>
+
+//[ get_hashes
+template <class Container>
+std::vector<std::size_t> get_hashes(Container const& x)
+{
+    std::vector<std::size_t> hashes;
+    std::transform(x.begin(), x.end(), std::back_inserter(hashes),
+        boost::hash<typename Container::value_type>());
+
+    return hashes;
+}
+//]
+
+int main() {
+    std::vector<int> values;
+    values.push_back(10);
+    values.push_back(20);
+
+    std::vector<std::size_t> hashes = get_hashes(values);
+    assert(hashes[0] = boost::hash<int>()(values[0]));
+    assert(hashes[1] = boost::hash<int>()(values[1]));
+}

doc/tutorial.qbk

@@ -3,6 +3,9 @@
  / Distributed under the Boost Software License, Version 1.0. (See accompanying
  / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ]
 
+[quickbook 1.7]
+[import samples/tutorial.cpp]
+
 [def __multi-index-short__ [@boost:/libs/multi_index/doc/index.html
     Boost.MultiIndex]]
 
@@ -39,15 +42,7 @@ To use [classref boost::hash] directly, create an instance and call it as a func
 For an example of generic use, here is a function to generate a vector
 containing the hashes of the elements of a container:
 
-    template <class Container>
-    std::vector<std::size_t> get_hashes(Container const& x)
-    {
-        std::vector<std::size_t> hashes;
-        std::transform(x.begin(), x.end(), std::insert_iterator(hashes),
-            ``[classref boost::hash]``<typename Container::value_type>());
-
-        return hashes;
-    }
+[get_hashes]
 
 [endsect]