Update copyright years

This is part of the effort to make the Boost libraries "modular" for build and consumption. See https://lists.boost.org/Archives/boost/2024/01/255704.php and https://github.com/grafikrobot/boost-b2-modular/blob/b2-modular/README.adoc for more information.

This PR depends on the following other PRs being merged to both develop and master branches of the respective repos:

- https://github.com/boostorg/boost/pull/854

This PR will be changed to ready for review, i.e. not draft, when the above are merged. Do not merge this one until that time.

build.jam

@@ -0,0 +1,26 @@
+# Copyright René Ferdinand Rivera Morell 2023-2024
+# 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)
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/assert//boost_assert
+    /boost/config//boost_config
+    /boost/smart_ptr//boost_smart_ptr
+    /boost/throw_exception//boost_throw_exception ;
+
+project /boost/conversion
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_conversion : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_conversion test ]
+    ;
+
+call-if : boost-library conversion
+    ;
+

doc/conversion.qbk

@@ -1,6 +1,6 @@
 [/
     Copyright 2016 Mikhail Maximov.
-    Copyright Antony Polukhin, 2020-2024.
+    Copyright Antony Polukhin, 2020-2025.
 
     Distributed under the Boost Software License, Version 1.0. (See accompanying
     file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)
@@ -12,7 +12,7 @@
     [id conversion]
     [version 1.7]
     [authors [Stroustrup, Bjarne], [Abrahams, Dave], [Rasin, Boris], [Polukhin, Antony]]
-    [copyright 2001 Beman Dawes, 2014-2024 Antony Polukhin]
+    [copyright 2001 Beman Dawes, 2014-2025 Antony Polukhin]
     [license
         Distributed under the Boost Software License, Version 1.0.
         (See accompanying file LICENSE_1_0.txt or copy at
@@ -150,10 +150,10 @@ This includes C++ built-in pointers, `std::shared_ptr`,
     class Banana : public Fruit {};
 
     // Use one of these:
-    typedef Fruit* FruitPtr;
-    typedef std::shared_ptr<Fruit> FruitPtr;
-    typedef boost::shared_ptr<Fruit> FruitPtr;
-    typedef boost::intrusive_ptr<Fruit> FruitPtr;
+    using FruitPtr = Fruit*;
+    using FruitPtr = std::shared_ptr<Fruit>;
+    using FruitPtr = boost::shared_ptr<Fruit>;
+    using FruitPtr = boost::intrusive_ptr<Fruit>;
 
     void f(FruitPtr fruit) {
       // ... logic which leads us to believe it is a banana

include/boost/implicit_cast.hpp

@@ -17,7 +17,7 @@ namespace detail {
 
 template<class T> struct icast_identity
 {
-    typedef T type;
+    using type = T;
 };
 
 } // namespace detail

include/boost/polymorphic_cast.hpp

@@ -113,7 +113,7 @@ namespace boost
         std::is_reference<Target>::value, Target
     >::type polymorphic_downcast(Source& x)
     {
-        typedef typename std::remove_reference<Target>::type* target_pointer_type;
+        using target_pointer_type = typename std::remove_reference<Target>::type*;
         return *boost::polymorphic_downcast<target_pointer_type>(
             std::addressof(x)
         );

include/boost/polymorphic_pointer_cast.hpp

@@ -1,6 +1,6 @@
 //  boost polymorphic_pointer_cast.hpp header file  ----------------------------------------------//
 //  (C) Copyright Boris Rasin, 2014-2021.
-//  (C) Copyright Antony Polukhin, 2014-2024.
+//  (C) Copyright Antony Polukhin, 2014-2025.
 //  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)

test/Jamfile.v2

@@ -5,13 +5,15 @@
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 #
 
+require-b2 5.0.1 ;
+import-search /boost/config/checks ;
+import config : requires ;
 import testing ;
 import feature ;
 
-import ../../config/checks/config : requires ;
-
 project
     : requirements
+        <library>/boost/conversion//boost_conversion
         [ requires cxx11_decltype ]
         # default to all warnings on:
         <warnings>all

test/appveyor.yml

@@ -2,7 +2,7 @@
 # subject to 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)
 #
-# Copyright Antony Polukhin, 2016-2024.
+# Copyright Antony Polukhin, 2016-2025.
 
 #
 # See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file

test/implicit_cast.cpp

@@ -18,8 +18,8 @@ struct foo
     operator long() const { return 0; }
 };
 
-typedef type<long> long_type;
-typedef type<foo> foo_type;
+using long_type = type<long>;
+using foo_type = type<foo>;
 
 int main()
 {