False positive for empty_enum_arguments

[lilyball]

Bug Report

The empty_enum_arguments rule has a false positive on a line that looks like

case (let f as () -> String)?:

It highlights the open parenthesis from the nested pair with the message

warning: Empty Enum Arguments Violation: Arguments can be omitted when matching enums with associated types if they are not used. (empty_enum_arguments)

Environment

• SwiftLint version (run swiftlint version to be sure)?

0.24.0

• Installation method used (Homebrew, CocoaPods, building from source, etc)?

CocoaPods

• Paste your configuration file:

.swiftlint.yml

disabled_rules:
  - force_cast
  - notification_center_detachment
  - identifier_name
  - trailing_comma
  - type_name
  - trailing_whitespace
  - conditional_returns_on_newline
  - opening_brace
  - cyclomatic_complexity
  - todo
  - fallthrough
  - force_try
  - unneeded_parentheses_in_closure_argument
  - nesting
  - unused_closure_parameter
  - large_tuple
opt_in_rules:
  - empty_count
  - closure_spacing
  - conditional_returns_on_newline
  - explicit_init
  - fatal_error_message
  - first_where
  - overridden_super_call
  - private_outlet
  - prohibited_super_call
  - redundant_nil_coalescing
  - sorted_first_last
  - override_in_extension
  - private_over_fileprivate
  - private_unit_test
included:
  - ./
excluded: # paths to ignore during linting. Takes precedence over `included`.
  - Code/GraphQL/API.swift

# Rule Configuration
line_length: 200
function_body_length:
  warning: 200
  error: 400
type_body_length:
  warning: 500
  error: 600
file_length:
  warning: 1000
  error: 2000
function_parameter_count:
  warning: 10
type_name:
  min_length: 4
  max_length: 60
identifier_name:
  min_length:
    error: 3
  excluded:
    - id
    - URL
private_outlet:
  allow_private_set: true

reporter: "xcode"