================================================================================
Simple Enum
================================================================================

enum Foobar {
  Foo,
  Bar,
}

--------------------------------------------------------------------------------

(root
  (statement
    (statement_kind
      (type_definition
        (enum_definition
          (identifier)
          (identifier)
          (identifier))))))

================================================================================
Enum with Arguments
================================================================================

enum Foobar<T, U> {
  Foo<T>,
  Bar<U>,
}

--------------------------------------------------------------------------------

(root
  (statement
    (statement_kind
      (type_definition
        (enum_definition
          (identifier)
          (type_arguments
            (type
              (identifier))
            (type
              (identifier)))
          (identifier)
          (type_arguments
            (type
              (identifier)))
          (identifier)
          (type_arguments
            (type
              (identifier))))))))

================================================================================
Complex Enum
================================================================================

enum Foobar<T> {
  Foo<Foo>,
  Bar<int, float>,
  Baz<Option<T>>
}

--------------------------------------------------------------------------------

(root
  (statement
    (statement_kind
      (type_definition
        (enum_definition
          (identifier)
          (type_arguments
            (type
              (identifier)))
          (identifier)
          (type_arguments
            (type
              (identifier)))
          (identifier)
          (type_arguments
            (type)
            (type))
          (identifier)
          (type_arguments
            (type
              (identifier)
              (type
                (identifier)))))))))

================================================================================
Simple Enum Instance
================================================================================

Foobar::Foo

--------------------------------------------------------------------------------

(root
  (statement
    (statement_kind
      (expression
        (value
          (enum_instance
            (identifier)
            (identifier)))))))

================================================================================
Nested Enum Instance
================================================================================

FooBar::Bar(BazBuf::Baz(123))

--------------------------------------------------------------------------------

(root
  (statement
    (statement_kind
      (expression
        (value
          (enum_instance
            (identifier)
            (identifier)
            (expression
              (value
                (enum_instance
                  (identifier)
                  (identifier)
                  (expression
                    (value
                      (integer))))))))))))