[Issue 22019] New: `case 1,:` allowed by grammar but not DMD

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22019

          Issue ID: 22019
           Summary: `case 1,:` allowed by grammar but not DMD
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: spec
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: dlang-bugzilla at thecybershadow.net
          Reporter: dlang-bugzilla at thecybershadow.net

////// test.d //////
void main()
{
    final switch (1)
    {
        case 1,:
            break;
    }
}
////////////////////

Allowed in grammar (CaseStatement -> ArgumentList which may end with ,) but not
by DMD.

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