Core/Utils: Replace boost flat_set with our own

tests/common/FlatSet.cpp

@@ -0,0 +1,60 @@
+/*
+ * 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/>.
+ */
+
+#include "tc_catch2.h"
+
+#include "FlatSet.h"
+
+TEST_CASE("Insertion", "[FlatSet]")
+{
+    Trinity::Containers::FlatSet<int> flat;
+
+    REQUIRE(flat.insert(5).second == true);
+    REQUIRE(flat.insert(3).second == true);
+    REQUIRE(flat.insert(9).second == true);
+    REQUIRE(flat.insert(7).second == true);
+
+    REQUIRE(flat.insert(5).second == false);
+    REQUIRE(flat.insert(3).second == false);
+    REQUIRE(flat.insert(9).second == false);
+    REQUIRE(flat.insert(7).second == false);
+
+    REQUIRE(flat.size() == 4);
+
+    auto itr = flat.begin();
+    REQUIRE(*itr == 3);
+    ++itr;
+    REQUIRE(*itr == 5);
+    ++itr;
+    REQUIRE(*itr == 7);
+    ++itr;
+    REQUIRE(*itr == 9);
+    ++itr;
+    REQUIRE(itr == flat.end());
+}
+
+TEST_CASE("Erase", "[FlatSet]")
+{
+    Trinity::Containers::FlatSet<int> flat;
+    flat.insert(3);
+    flat.insert(5);
+    flat.insert(7);
+    flat.insert(9);
+
+    REQUIRE(flat.erase(7) == 1);
+    REQUIRE(flat.size() == 3);
+}