Merge branch 'master' into 1.17

src/main/java/carpet/script/value/BooleanValue.java

@@ -0,0 +1,58 @@
+package carpet.script.value;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+import net.minecraft.nbt.ByteTag;
+import net.minecraft.nbt.Tag;
+
+public class BooleanValue extends NumericValue
+{
+    public static final BooleanValue FALSE = new BooleanValue(false);
+    public static final BooleanValue TRUE = new BooleanValue(true);
+
+    boolean boolValue;
+    private BooleanValue(boolean boolval) {
+        super(boolval);
+        boolValue = boolval;
+    }
+
+    @Override
+    public String getString() {
+        return boolValue?"true":"false";
+    }
+
+    @Override
+    public String getPrettyString() {
+        return getString();
+    }
+
+    @Override
+    public String getTypeString() {
+        return "bool";
+    }
+
+    @Override
+    public Value clone() {
+        return new BooleanValue(boolValue);
+    }
+
+    @Override
+    public int hashCode() {
+        return Boolean.hashCode(boolValue);
+    }
+
+    @Override
+    public Tag toTag(boolean force) {
+        return ByteTag.of(boolValue);
+    }
+
+    @Override
+    public JsonElement toJson() {
+        return new JsonPrimitive(boolValue);
+    }
+
+    @Override
+    public boolean isInteger() {
+        return true;
+    }
+}

src/main/java/carpet/script/value/NullValue.java

@@ -9,6 +9,7 @@ import net.minecraft.nbt.Tag;
 
 public class NullValue extends NumericValue // TODO check nonsingleton code
 {
+    public static final NullValue NULL = new NullValue();
     @Override
     public String getString()
     {
@@ -32,7 +33,7 @@ public class NullValue extends NumericValue // TODO check nonsingleton code
     {
         return new NullValue();
     }
-    public NullValue() {super(0.0D);}
+    private NullValue() {super(false);}
 
     @Override
     public boolean equals(final Object o)

src/main/java/carpet/script/value/Value.java

@@ -15,12 +15,12 @@ import java.util.stream.Collectors;
 
 public abstract class Value implements Comparable<Value>, Cloneable
 {
-    public static NumericValue FALSE = new NumericValue(0);
-    public static NumericValue TRUE = new NumericValue(1);
-    public static NumericValue ZERO = FALSE;
-    public static NumericValue ONE = TRUE;
+    public static NumericValue FALSE = BooleanValue.FALSE;
+    public static NumericValue TRUE = BooleanValue.TRUE;
+    public static NumericValue ZERO = new NumericValue(0);
+    public static NumericValue ONE = new NumericValue(1);
 
-    public static NullValue NULL = new NullValue();
+    public static NullValue NULL = NullValue.NULL;
 
     public String boundVariable;