Core/Auras: Minor optimization for Unit object creation with msvc (not allocating a list end sentinel node for all of the 500 lists stored in Unit for each aura type)

1 files changed, 53 insertions, 0 deletions

diff --git a/src/common/Containers/Utilities/ListUtils.h b/src/common/Containers/Utilities/ListUtils.h
new file mode 100644
index 00000000000..f5de0d42ec9
--- /dev/null
+++ b/src/common/Containers/Utilities/ListUtils.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TRINITYCORE_LIST_UTILS_H
+#define TRINITYCORE_LIST_UTILS_H
+
+#include <forward_list>
+#include <list>
+
+namespace Trinity::Containers::Lists
+{
+template<typename T, typename Alloc = std::allocator<T>>
+inline typename std::list<T, Alloc>::iterator RemoveUnique(std::list<T, Alloc>& list, T const& value)
+{
+    auto itr = std::find(list.begin(), list.end(), value);
+    if (itr != list.end())
+        return list.erase(itr);
+
+    return list.end();
+}
+
+template<typename T, typename Alloc = std::allocator<T>>
+inline typename std::forward_list<T, Alloc>::iterator RemoveUnique(std::forward_list<T, Alloc>& list, T const& value)
+{
+    auto itr = list.before_begin();
+    auto toErase = std::next(itr);
+    while (toErase != list.end())
+    {
+        if (*toErase == value)
+            return list.erase_after(itr);
+
+        itr = toErase++;
+    }
+
+    return list.end();
+}
+}
+
+#endif // TRINITYCORE_LIST_UTILS_H