From 27cd5a90f4c1f34c47cd4e1bd1a616e9b11b10ec Mon Sep 17 00:00:00 2001
From: Shauren <shauren.trinity@gmail.com>
Date: Sat, 7 Jan 2023 22:38:21 +0100
Subject: Core/Misc: Replace enable_if overload selection with if constexpr

(cherry picked from commit a53e4a57565d3375a978effbbc32d3eed6aac7e3)
---
 src/common/Containers/Utilities/MapUtils.h | 51 ++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/common/Containers/Utilities/MapUtils.h

(limited to 'src/common/Containers/Utilities/MapUtils.h')

diff --git a/src/common/Containers/Utilities/MapUtils.h b/src/common/Containers/Utilities/MapUtils.h
new file mode 100644
index 00000000000..7cf07243b0a
--- /dev/null
+++ b/src/common/Containers/Utilities/MapUtils.h
@@ -0,0 +1,51 @@
+/*
+ * 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_MAP_UTILS_H
+#define TRINITYCORE_MAP_UTILS_H
+
+#include <type_traits>
+
+namespace Trinity::Containers
+{
+/**
+ * Returns a pointer to mapped value (or the value itself if map stores pointers)
+ */
+template<class M>
+auto MapGetValuePtr(M& map, typename M::key_type const& key)
+{
+    auto itr = map.find(key);
+    if constexpr (std::is_pointer_v<typename M::mapped_type>)
+        return itr != map.end() ? itr->second : nullptr;
+    else
+        return itr != map.end() ? &itr->second : nullptr;
+}
+
+template<class K, class V, template<class, class, class...> class M, class... Rest>
+void MultimapErasePair(M<K, V, Rest...>& multimap, K const& key, V const& value)
+{
+    auto range = multimap.equal_range(key);
+    for (auto itr = range.first; itr != range.second;)
+    {
+        if (itr->second == value)
+            itr = multimap.erase(itr);
+        else
+            ++itr;
+    }
+}
+}
+#endif // TRINITYCORE_MAP_UTILS_H
-- 
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