From 30a9b5574d90da958f305372078ad9c80522641d Mon Sep 17 00:00:00 2001
From: Ibrahim Wassouf <ib981347@dal.ca>
Date: Tue, 25 Jul 2023 20:34:48 -0300
Subject: [PATCH] Correct classDef and class grammar

Previously, you were allowed to define a class called 'default'
but were not allowed to use it because the classStatement grammar
expected an alphanum, which did not include the word DEFAULT
---
 cypress/integration/rendering/flowchart.spec.js       | 11 +++++++++++
 .../mermaid/src/diagrams/flowchart/parser/flow.jison  |  4 ++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/cypress/integration/rendering/flowchart.spec.js b/cypress/integration/rendering/flowchart.spec.js
index 4f6d6478e..6d8b4a49a 100644
--- a/cypress/integration/rendering/flowchart.spec.js
+++ b/cypress/integration/rendering/flowchart.spec.js
@@ -891,4 +891,15 @@ graph TD
       { htmlLabels: true, flowchart: { htmlLabels: true }, securityLevel: 'loose' }
     );
   });
+  it('66: apply class called default on node called default', () => {
+    imgSnapshotTest(
+      `
+      graph TD
+        classDef default fill:#000,stroke:#000,stroke-width:4px,color:#fff 
+        default --> default2
+        class default,default2 default
+      `,
+      { htmlLabels: true, flowchart: { htmlLabels: true }, securityLevel: 'loose' }
+    );
+  });
 });
diff --git a/packages/mermaid/src/diagrams/flowchart/parser/flow.jison b/packages/mermaid/src/diagrams/flowchart/parser/flow.jison
index f333702d6..2ed1c7b2e 100644
--- a/packages/mermaid/src/diagrams/flowchart/parser/flow.jison
+++ b/packages/mermaid/src/diagrams/flowchart/parser/flow.jison
@@ -507,8 +507,8 @@ classDefStatement:CLASSDEF SPACE idString SPACE stylesOpt
     {$$ = $CLASSDEF;yy.addClass($idString,$stylesOpt);}
     ;
 
-classStatement:CLASS SPACE idString SPACE alphaNum
-    {$$ = $CLASS;yy.setClass($idString, $alphaNum);}
+classStatement:CLASS SPACE idString\[vertex] SPACE idString\[class]
+    {$$ = $CLASS;yy.setClass($vertex, $class);}
     ;
 
 clickStatement