feat: implement mphatom use case always destroying its content

src/converters/mathml-interfaces-to-latex/mathml-tag-to-latex/Dispatcher.ts

@@ -14,6 +14,7 @@ import {
   MEnclose,
   MError,
   MOver,
+  MPhantom,
 } from './mathml-tags';
 
 export class Dispatcher {
@@ -57,6 +58,8 @@ export class Dispatcher {
         return new MError(this._value, this._attributes, this._children);
       case 'mover':
         return new MOver(this._value, this._attributes, this._children);
+      case 'mphantom':
+        return new MPhantom(this._value, this._attributes, this._children);
       case 'mrow':
       case 'mpadded':
         return new GenericContentWrapperTag(this._name, this._value, this._attributes, this._children);

src/converters/mathml-interfaces-to-latex/mathml-tag-to-latex/mathml-tags/MPhantom.ts

@@ -0,0 +1,11 @@
+import { MathMLTag } from './MathMLTag';
+
+export class MPhantom extends MathMLTag {
+  constructor(value: string, attributes: Record<string, string>, children: MathMLTag[]) {
+    super('mphantom', value, attributes, children);
+  }
+
+  convert(): string {
+    return '';
+  }
+}

src/converters/mathml-interfaces-to-latex/mathml-tag-to-latex/mathml-tags/index.ts

@@ -13,3 +13,4 @@ export { MAction } from './MAction';
 export { MEnclose } from './MEnclose';
 export { MError } from './MError';
 export { MOver } from './MOver';
+export { MPhantom } from './MPhantom';