Comparators - add default comparators

src/main/java/ch/njol/skript/classes/EnumClassInfo.java

@@ -8,6 +8,8 @@
 import ch.njol.util.coll.iterator.ArrayIterator;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.skriptlang.skript.lang.comparator.Comparators;
+import org.skriptlang.skript.lang.comparator.Relation;
 
 /**
  * This class can be used for an easier writing of ClassInfos that are enums,
@@ -55,6 +57,8 @@ public EnumClassInfo(Class<T> enumClass, String codeName, String languageNode, D
 					return enumUtils.toString(constant, StringMode.VARIABLE_NAME);
 				}
 			});
+
+		Comparators.registerComparator(enumClass, enumClass, (o1, o2) -> Relation.get(o1.ordinal() - o2.ordinal()));
 	}
 
 }

src/main/java/ch/njol/skript/classes/registry/RegistryClassInfo.java

@@ -1,28 +1,12 @@
-/**
- *   This file is part of Skript.
- *
- *  Skript 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 3 of the License, or
- *  (at your option) any later version.
- *
- *  Skript 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 Skript.  If not, see <http://www.gnu.org/licenses/>.
- *
- * Copyright Peter Güttinger, SkriptLang team and contributors
- */
 package ch.njol.skript.classes.registry;
 
 import ch.njol.skript.classes.ClassInfo;
 import ch.njol.skript.expressions.base.EventValueExpression;
 import ch.njol.skript.lang.DefaultExpression;
 import org.bukkit.Keyed;
 import org.bukkit.Registry;
+import org.skriptlang.skript.lang.comparator.Comparators;
+import org.skriptlang.skript.lang.comparator.Relation;
 
 /**
  * This class can be used for easily creating ClassInfos for {@link Registry}s.
@@ -48,6 +32,8 @@ public RegistryClassInfo(Class<R> registryClass, Registry<R> registry, String co
 			.serializer(new RegistrySerializer<R>(registry))
 			.defaultExpression(defaultExpression)
 			.parser(registryParser);
+
+		Comparators.registerComparator(registryClass, registryClass, (o1, o2) -> Relation.get(o1.getKey() == o2.getKey()));
 	}
 
 }

src/test/skript/tests/misc/registry-enum-comparators.sk

@@ -0,0 +1,24 @@
+test "registry and enum comparators":
+	# We're using loops because that is when Skript appears to hate comparing things
+	# Example errors when Skript doesn't have explicit comparators:
+	#  'Can't compare a biome with a biome'
+	#  'Can't compare a attribute type with a attribute type'
+
+
+	# Compare registry entries
+	loop all biomes:
+		if loop-value = plains:
+			assert loop-value = plains with "Should be able to compare biomes"
+
+	loop all attribute types:
+		if loop-value = generic movement speed:
+			assert loop-value = generic movement speed with "Should be able to compare attribute types"
+
+	# Compare enum entries
+	loop all teleport causes:
+		if loop-value = ender pearl:
+			assert loop-value = ender pearl with "Should be able to compare teleport causes"
+
+	loop all spawn reasons:
+		if loop-value = jockey:
+			assert loop-value = jockey with "Should be able to compare spawn reasons"