Merge pull request #6332 from ajuckel/ajuckel/issue-6171-equals-in-sequence-labels

fix: Allow equals sign in sequenceDiagram labels

.changeset/red-zebras-happen.md

@@ -0,0 +1,5 @@
+---
+'mermaid': patch
+---
+
+fix: Allow equals sign in sequenceDiagram labels

packages/mermaid/src/diagrams/sequence/parser/sequenceDiagram.jison

@@ -33,7 +33,7 @@
 "actor"                                                   		{ this.begin('ID'); return 'participant_actor'; }
 "create"                                                        return 'create';
 "destroy"                                                       { this.begin('ID'); return 'destroy'; }
-<ID>[^\<->\->:\n,;]+?([\-]*[^\<->\->:\n,;]+?)*?(?=((?!\n)\s)+"as"(?!\n)\s|[#\n;]|$)     { yytext = yytext.trim(); this.begin('ALIAS'); return 'ACTOR'; }
+<ID>[^<\->\->:\n,;]+?([\-]*[^<\->\->:\n,;]+?)*?(?=((?!\n)\s)+"as"(?!\n)\s|[#\n;]|$)     { yytext = yytext.trim(); this.begin('ALIAS'); return 'ACTOR'; }
 <ALIAS>"as"                                                     { this.popState(); this.popState(); this.begin('LINE'); return 'AS'; }
 <ALIAS>(?:)                                                     { this.popState(); this.popState(); return 'NEWLINE'; }
 "loop"                                                          { this.begin('LINE'); return 'loop'; }
@@ -73,7 +73,7 @@ accDescr\s*"{"\s*                                { this.begin("acc_descr_multili
 "off"															return 'off';
 ","                                                             return ',';
 ";"                                                             return 'NEWLINE';
-[^\+\<->\->:\n,;]+((?!(\-x|\-\-x|\-\)|\-\-\)))[\-]*[^\+\<->\->:\n,;]+)*             { yytext = yytext.trim(); return 'ACTOR'; }
+[^+<\->\->:\n,;]+((?!(\-x|\-\-x|\-\)|\-\-\)))[\-]*[^\+<\->\->:\n,;]+)*             { yytext = yytext.trim(); return 'ACTOR'; }
 "->>"                                                           return 'SOLID_ARROW';
 "<<->>"                                                           return 'BIDIRECTIONAL_SOLID_ARROW';
 "-->>"                                                          return 'DOTTED_ARROW';

packages/mermaid/src/diagrams/sequence/sequenceDiagram.spec.js

@@ -350,6 +350,26 @@ Bob-->Alice-in-Wonderland:I am good thanks!`);
     expect(messages[1].from).toBe('Bob');
   });
 
+  it('should handle equals in participant names', async () => {
+    const diagram = await Diagram.fromText(`
+sequenceDiagram
+participant Alice=Wonderland
+participant Bob
+Alice=Wonderland->Bob:Hello Bob, how are - you?
+Bob-->Alice=Wonderland:I am good thanks!`);
+
+    const actors = diagram.db.getActors();
+    expect([...actors.keys()]).toEqual(['Alice=Wonderland', 'Bob']);
+    expect(actors.get('Alice=Wonderland').description).toBe('Alice=Wonderland');
+    expect(actors.get('Bob').description).toBe('Bob');
+
+    const messages = diagram.db.getMessages();
+
+    expect(messages.length).toBe(2);
+    expect(messages[0].from).toBe('Alice=Wonderland');
+    expect(messages[1].from).toBe('Bob');
+  });
+
   it('should alias participants', async () => {
     const diagram = await Diagram.fromText(`
 sequenceDiagram