From 5496dd3bbea8b1cda8ab7bb72b56b5826d59849b Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 8 Sep 2025 21:49:23 +0300
Subject: [PATCH] Add boost/uuid/constants.hpp

---
 include/boost/uuid.hpp                 |  1 +
 include/boost/uuid/constants.hpp       | 11 +++++++++++
 include/boost/uuid/detail/nil_uuid.hpp | 20 ++++++++++++++++++++
 include/boost/uuid/nil_generator.hpp   |  6 +-----
 test/CMakeLists.txt                    |  2 ++
 test/Jamfile.v2                        |  4 ++++
 test/test_constants.cpp                | 23 +++++++++++++++++++++++
 7 files changed, 62 insertions(+), 5 deletions(-)
 create mode 100644 include/boost/uuid/constants.hpp
 create mode 100644 include/boost/uuid/detail/nil_uuid.hpp
 create mode 100644 test/test_constants.cpp

diff --git a/include/boost/uuid.hpp b/include/boost/uuid.hpp
index 623336b..02dfa8c 100644
--- a/include/boost/uuid.hpp
+++ b/include/boost/uuid.hpp
@@ -8,5 +8,6 @@
 #include <boost/uuid/uuid.hpp>
 #include <boost/uuid/uuid_io.hpp>
 #include <boost/uuid/uuid_generators.hpp>
+#include <boost/uuid/constants.hpp>
 
 #endif // #ifndef BOOST_UUID_HPP_INCLUDED
diff --git a/include/boost/uuid/constants.hpp b/include/boost/uuid/constants.hpp
new file mode 100644
index 0000000..98ef6d0
--- /dev/null
+++ b/include/boost/uuid/constants.hpp
@@ -0,0 +1,11 @@
+#ifndef BOOST_UUID_CONSTANTS_HPP_INCLUDED
+#define BOOST_UUID_CONSTANTS_HPP_INCLUDED
+
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/uuid/namespaces.hpp>
+#include <boost/uuid/detail/nil_uuid.hpp>
+
+#endif // BOOST_UUID_CONSTANTS_HPP_INCLUDED
diff --git a/include/boost/uuid/detail/nil_uuid.hpp b/include/boost/uuid/detail/nil_uuid.hpp
new file mode 100644
index 0000000..2371823
--- /dev/null
+++ b/include/boost/uuid/detail/nil_uuid.hpp
@@ -0,0 +1,20 @@
+#ifndef BOOST_UUID_DETAIL_NIL_UUID_INCLUDED
+#define BOOST_UUID_DETAIL_NIL_UUID_INCLUDED
+
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/uuid/uuid.hpp>
+
+namespace boost {
+namespace uuids {
+
+inline uuid nil_uuid() noexcept
+{
+    return {{}};
+}
+
+}} // namespace boost::uuids
+
+#endif // #ifndef BOOST_UUID_DETAIL_NIL_UUID_INCLUDED
diff --git a/include/boost/uuid/nil_generator.hpp b/include/boost/uuid/nil_generator.hpp
index 5b3ace7..7323339 100644
--- a/include/boost/uuid/nil_generator.hpp
+++ b/include/boost/uuid/nil_generator.hpp
@@ -6,6 +6,7 @@
 // https://www.boost.org/LICENSE_1_0.txt
 
 #include <boost/uuid/uuid.hpp>
+#include <boost/uuid/detail/nil_uuid.hpp>
 
 namespace boost {
 namespace uuids {
@@ -21,11 +22,6 @@ struct nil_generator
     }
 };
 
-inline uuid nil_uuid() noexcept
-{
-    return {{}};
-}
-
 }} // namespace boost::uuids
 
 #endif // BOOST_UUID_NIL_GENERATOR_HPP_INCLUDED
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 74c4e35..996f73b 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -81,6 +81,8 @@ boost_test(TYPE run SOURCES test_detail_random_provider.cpp LINK_LIBRARIES Boost
 
 boost_test(TYPE run SOURCES test_serialization.cpp LINK_LIBRARIES Boost::serialization)
 
+boost_test(TYPE run SOURCES test_constants.cpp)
+
 boost_test(TYPE compile SOURCES test_uuid_cx.cpp)
 boost_test(TYPE run SOURCES test_string_generator_cx.cpp)
 
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 5e5c6cf..dcad707 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -203,6 +203,10 @@ run test_entropy_error.cpp ;
 run test_detail_random_provider.cpp
   : : : <library>/boost/array//boost_array ;
 
+# constants
+
+run test_constants.cpp ;
+
 # constexpr tests
 
 compile test_uuid_cx.cpp ;
diff --git a/test/test_constants.cpp b/test/test_constants.cpp
new file mode 100644
index 0000000..946e410
--- /dev/null
+++ b/test/test_constants.cpp
@@ -0,0 +1,23 @@
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/uuid/constants.hpp>
+#include <boost/uuid/uuid.hpp>
+#include <boost/uuid/uuid_io.hpp>
+#include <boost/uuid/string_generator.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+using namespace boost::uuids;
+
+int main()
+{
+    BOOST_TEST_EQ( ns::dns(), string_generator()("6ba7b810-9dad-11d1-80b4-00c04fd430c8"));
+    BOOST_TEST_EQ( ns::url(), string_generator()("6ba7b811-9dad-11d1-80b4-00c04fd430c8"));
+    BOOST_TEST_EQ( ns::oid(), string_generator()("6ba7b812-9dad-11d1-80b4-00c04fd430c8"));
+    BOOST_TEST_EQ( ns::x500dn(), string_generator()("6ba7b814-9dad-11d1-80b4-00c04fd430c8"));
+
+    BOOST_TEST_EQ( nil_uuid(), string_generator()("00000000-0000-0000-0000-000000000000"));
+
+    return boost::report_errors();
+}