chore: make parser as optional in ParserDefinition

packages/mermaid-zenuml/src/parser.ts

@@ -5,7 +5,6 @@
  * This is a dummy parser that satisfies the mermaid API logic.
  */
 export default {
-  parser: { yy: {} },
   parse: () => {
     // no op
   },

packages/mermaid/src/Diagram.ts

@@ -50,7 +50,9 @@ export class Diagram {
     this.parser.parse = (text: string) =>
       originalParse(cleanupComments(extractFrontMatter(text, this.db)));
 
+    if (this.parser.parser?.yy) {
       this.parser.parser.yy = this.db;
+    }
     this.init = diagram.init;
     this.parse();
   }

packages/mermaid/src/diagram-api/diagram-orchestration.ts

@@ -45,7 +45,6 @@ export const addDiagrams = () => {
       styles: {}, // should never be used
       renderer: {}, // should never be used
       parser: {
-        parser: { yy: {} },
         parse: () => {
           throw new Error(
             'Diagrams beginning with --- are not valid. ' +

packages/mermaid/src/diagram-api/diagramAPI.spec.ts

@@ -39,7 +39,6 @@ describe('DiagramAPI', () => {
           parse: (_text) => {
             return;
           },
-          parser: { yy: {} },
         },
         renderer: {},
         styles: {},

packages/mermaid/src/diagram-api/types.ts

@@ -72,7 +72,7 @@ export type DrawDefinition = (
 
 export interface ParserDefinition {
   parse: (text: string) => void;
-  parser: { yy: DiagramDB };
+  parser?: { yy: DiagramDB };
 }
 
 /**

packages/mermaid/src/diagram.spec.ts

@@ -30,9 +30,6 @@ describe('diagram detection', () => {
               parse: () => {
                 // no-op
               },
-              parser: {
-                yy: {},
-              },
             },
             renderer: {},
             styles: {},

packages/mermaid/src/diagrams/error/errorDiagram.ts

@@ -5,7 +5,6 @@ const diagram: DiagramDefinition = {
   db: {},
   renderer,
   parser: {
-    parser: { yy: {} },
     parse: (): void => {
       return;
     },

packages/mermaid/src/mermaid.spec.ts

@@ -102,7 +102,6 @@ describe('when using mermaid and ', () => {
           parse: (_text) => {
             return;
           },
-          parser: { yy: {} },
         },
         styles: () => {
           // do nothing