muScript: more helpful dynamic type conversion exception

muscript/src/main/java/io/gitlab/jfronny/muscript/ast/dynamic/Get.java

@@ -35,7 +35,7 @@ public class Get extends DynamicExpr {
         } else if (left instanceof DList l) {
             return l.get(name.asNumberExpr().get(dataRoot).intValue());
         }
-        throw new DynamicTypeConversionException("object or list").locational(chStart, chEnd);
+        throw new DynamicTypeConversionException("object or list", left).locational(chStart, chEnd);
     }
 
     @Override

muscript/src/main/java/io/gitlab/jfronny/muscript/data/dynamic/Dynamic.java

@@ -40,12 +40,12 @@ public sealed interface Dynamic<T> permits DBool, DNumber, DString, DObject, DLi
 
     default DBool asBool() {
         if (this instanceof DBool bool) return bool;
-        else throw new DynamicTypeConversionException("bool");
+        else throw new DynamicTypeConversionException("bool", this);
     }
 
     default DNumber asNumber() {
         if (this instanceof DNumber number) return number;
-        else throw new DynamicTypeConversionException("number");
+        else throw new DynamicTypeConversionException("number", this);
     }
 
     default DString asString() {
@@ -55,16 +55,16 @@ public sealed interface Dynamic<T> permits DBool, DNumber, DString, DObject, DLi
 
     default DObject asObject() {
         if (this instanceof DObject object) return object;
-        else throw new DynamicTypeConversionException("object");
+        else throw new DynamicTypeConversionException("object", this);
     }
 
     default DList asList() {
         if (this instanceof DList list) return list;
-        else throw new DynamicTypeConversionException("list");
+        else throw new DynamicTypeConversionException("list", this);
     }
 
     default DCallable asCallable() {
         if (this instanceof DCallable callable) return callable;
-        else throw new DynamicTypeConversionException("callable");
+        else throw new DynamicTypeConversionException("callable", this);
     }
 }

muscript/src/main/java/io/gitlab/jfronny/muscript/data/dynamic/DynamicTypeConversionException.java

@@ -3,15 +3,18 @@ package io.gitlab.jfronny.muscript.data.dynamic;
 import io.gitlab.jfronny.muscript.error.LocationalException;
 
 public class DynamicTypeConversionException extends RuntimeException {
-    private static final String MESSAGE = "Could not convert dynamic to ";
+    private static final String MESSAGE1 = "Could not convert dynamic of type ";
+    private static final String MESSAGE2 = " to ";
     private final String target;
+    private final String actual;
 
-    public DynamicTypeConversionException(String target) {
-        super(MESSAGE + target);
+    public DynamicTypeConversionException(String target, Dynamic<?> dynamic) {
+        super(MESSAGE1 + dynamic.getClass().getSimpleName() + MESSAGE2 + target);
         this.target = target;
+        this.actual = dynamic.getClass().getSimpleName();
     }
 
     public LocationalException locational(int start, int end) {
-        return new LocationalException(start, end, MESSAGE + target, this);
+        return new LocationalException(start, end, MESSAGE1 + actual + MESSAGE2 + target, this);
     }
 }