Missing last item in listings

Question

I was looking for enumeration options and just noticed a missing comma after the last option. Take, for example, that DayOfWeekenum (click F12to go to the definition):

public enum DayOfWeek
{
    Sunday    = 0,
    Monday    = 1,
    Tuesday   = 2,
    Wednesday = 3,
    Thursday  = 4,
    Friday    = 5,
    Saturday  = 6, // note this comma
}

Is there a reason for this behavior?

Answer 1

The trailing comma after the last member enumis optional. This, apparently, was done to help automatically generate code that can just spit things out without thinking about grammar.

Whether a comma is present or not does not change anything.

Take a look at the grammar:

:
  attributes _opt enum-modifiers_opt enum identifier enum-base_opt enum-body ; _opt

:
   : integral-type

:
   { enum-member-declarations_opt}
   { enum-member-declarations , }

- :
  enum-member-declaration
  enum-member-declarations  , enum-member-declaration

-:
  attributes _opt identifier
  attributes _opt identifier = constant-expression

, enum-body .

Answer 2

, ..:)

( ). , : , : (, , , , ).

Answer 3

The compiler simply ignores the last comma. It should not be there, but it is not a mistake if you put it