PiccodeValue: Add helper methods for creating error and success values

Author: hexaredecimal

src/main/java/org/piccode/rt/PiccodeValue.java

@@ -1,6 +1,8 @@
 package org.piccode.rt;
 
 import com.github.tomaslanger.chalk.Chalk;
+import java.util.ArrayList;
+import java.util.List;
 import org.piccode.ast.Ast;
 
 /**
@@ -24,6 +26,27 @@ public static void verifyType(Ast caller, PiccodeValue value, Type type) {
 		}
 	}
 
+	public static PiccodeValue error(PiccodeValue value) {
+		var nodes = new ArrayList<PiccodeValue>();
+		nodes.addFirst(new PiccodeUnit());
+		nodes.addLast(value);
+		return new PiccodeTuple(nodes);
+	}
+	
+	public static PiccodeValue success(PiccodeValue value) {
+		var nodes = new ArrayList<PiccodeValue>();
+		nodes.addFirst(value);
+		nodes.addLast(new PiccodeUnit());
+		return new PiccodeTuple(nodes);
+	}
+	
+	public static PiccodeValue error(String message) {
+		var nodes = new ArrayList<PiccodeValue>();
+		nodes.addFirst(new PiccodeUnit());
+		nodes.addLast(new PiccodeString(message));
+		return new PiccodeTuple(nodes);
+	}
+
 	public static enum Type {
 		NUMBER, 
 		STRING,