Update contrib/restricted/boost/locale to 1.88.0

commit_hash:87b595328ea79c6ba38cb973580804486ca4a3ff

1 files changed, 65 insertions, 0 deletions

diff --git a/contrib/restricted/boost/locale/src/shared/ios_prop.hpp b/contrib/restricted/boost/locale/src/shared/ios_prop.hpp
new file mode 100644
index 00000000000..d8256592f79
--- /dev/null
+++ b/contrib/restricted/boost/locale/src/shared/ios_prop.hpp
@@ -0,0 +1,65 @@
+//
+// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
+// Copyright (c) 2022 Alexander Grund
+//
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_SRC_LOCALE_IOS_PROP_HPP
+#define BOOST_SRC_LOCALE_IOS_PROP_HPP
+
+#include <boost/locale/config.hpp>
+#include <boost/assert.hpp>
+#include <ios>
+
+namespace boost { namespace locale { namespace impl {
+
+    template<typename Property>
+    class BOOST_SYMBOL_VISIBLE ios_prop {
+    public:
+        static Property& get(std::ios_base& ios)
+        {
+            Property* result = get_impl(ios);
+            return result ? *result : create(ios);
+        }
+
+        static void global_init() { get_id(); }
+
+    private:
+        static Property* get_impl(std::ios_base& ios) { return static_cast<Property*>(ios.pword(get_id())); }
+
+        static Property& create(std::ios_base& ios)
+        {
+            BOOST_ASSERT_MSG(!get_impl(ios), "Called create while the property already exists");
+            const int id = get_id();
+            ios.register_callback(callback, id);
+            Property* value = new Property();
+            ios.pword(id) = value;
+            return *value;
+        }
+
+        static void callback(std::ios_base::event ev, std::ios_base& ios, int id)
+        {
+            Property* prop = get_impl(ios);
+            if(!prop)
+                return;
+            switch(ev) {
+                case std::ios_base::erase_event:
+                    delete prop;
+                    ios.pword(id) = nullptr;
+                    break;
+                case std::ios_base::copyfmt_event: ios.pword(id) = new Property(*prop); break;
+                case std::ios_base::imbue_event: prop->on_imbue(); break;
+                default: break;
+            }
+        }
+        static int get_id()
+        {
+            static int id = std::ios_base::xalloc();
+            return id;
+        }
+    };
+
+}}} // namespace boost::locale::impl
+
+#endif