actualizar dart

Author: Ing-Brayan-Martinez

lib/dynamic/pattern.dart

@@ -1,81 +1,86 @@
+
 // root element
-abstract class Element {
+sealed class Element {
   String get();
 }
 
+
 // html element
-abstract class HtmlElement extends Element {}
+sealed class HtmlElement extends Element {
+
+}
 
 final class Div extends HtmlElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
 final class Span extends HtmlElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
 final class Paragraph extends HtmlElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
 final class Image extends HtmlElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
+
 // internal element
-abstract class InternalElement extends Element {}
+sealed class InternalElement extends Element {
+
+}
 
 final class Text extends InternalElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
 final class HtmlLiteral extends InternalElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
 final class Nothing extends InternalElement {
-  @override
   String get() {
-    return '';
+    return "";
   }
 }
 
+
 // custom element
-abstract class CustomElement extends Element {}
+sealed class CustomElement extends Element {
+
+}
+
+
 
 String getElement(Element element) {
   return switch (element) {
     HtmlElement html => switch (html) {
-        Div div => '<div>' + div.get() + '</div>',
-        Span span => '<span>' + span.get() + '</span>',
-        Paragraph paragraph => '<p>' + paragraph.get() + '</p>',
-        Image image => '<img src="' + image.get() + '" />',
-        _ => throw UnimplementedError(),
-      },
+      Div div => '<div>' + div.get() + '</div>',
+      Span span => '<span>' + span.get() + '</span>',
+      Paragraph paragraph => '<p>' + paragraph.get() + '</p>',
+      Image image => '<img src="' + image.get() + '" />',
+      _ => throw UnimplementedError(),
+    },
     InternalElement internal => switch (internal) {
-        Text text => text.get(),
-        HtmlLiteral htmlLiteral => htmlLiteral.get(),
-        Nothing nothing => nothing.get(),
-        _ => throw UnimplementedError(),
-      },
+      Text text => text.get(),
+      HtmlLiteral htmlLiteral => htmlLiteral.get(),
+      Nothing nothing => nothing.get(),
+      _ => throw UnimplementedError(),
+    },
     CustomElement custom => custom.toString(),
     _ => throw UnimplementedError(),
   };