Multi-line disabling `unused_declaration` doesn't apply to the first line

[rgoldberg]

New Issue Checklist

• I've Updated SwiftLint to the latest version.
• I've searched for existing GitHub issues.

Bug Description

Multi-line disabling unused_declaration doesn't apply to the first line

struct Xyz { // The next line triggers a violation:
	var x: String? // swiftlint:disable unused_declaration
	var y: String?
	var z: String? // swiftlint:enable unused_declaration
}

// No reported violations:
struct Abc { // swiftlint:disable unused_declaration
	var a: String?
	var b: String?
	var c: String? // swiftlint:enable unused_declaration
}

## zsh
$ swiftlint analyze --compiler-log-path =(xcodebuild -scheme mas -destination "platform=macOS,arch=$(arch),variant=macos" 2>&1)

Environment

SwiftLint version (run swiftlint version to be sure)

0.63.0

Xcode version (run xcodebuild -version to be sure)

Xcode 26.2
Build version 17C52

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

Homebrew Core

Configuration file:

---
excluded:
- .build/
- .idea/
- .swiftpm/
- .vscode/
opt_in_rules:
- all
analyzer_rules:
- all
disabled_rules:
- closure_body_length
- contrasted_opening_brace
- cyclomatic_complexity
- explicit_acl
- explicit_enum_raw_value
- explicit_self
- explicit_top_level_acl
- explicit_type_interface
- file_header
- function_body_length
- large_tuple
- multiple_closures_with_trailing_closure
- no_extension_access_modifier
- no_grouping_extension
- no_magic_numbers
- prefixed_toplevel_constant
- strict_fileprivate
- type_body_length
attributes:
  always_on_line_above: ['@Flag', '@MainActor', '@OptionGroup']
deployment_target:
  macOS_deployment_target: 13
  macOSApplicationExtension_deployment_target: 13
  iOS_deployment_target: 99
  iOSApplicationExtension_deployment_target: 99
  tvOS_deployment_target: 99
  tvOSApplicationExtension_deployment_target: 99
  watchOS_deployment_target: 99
  watchOSApplicationExtension_deployment_target: 99
explicit_init:
  include_bare_init: true
file_length:
  ignore_comment_only_lines: true
  warning: 500
file_name:
  excluded: [Group.swift, Process.swift, User.swift]
file_types_order:
  order:
  - main_type
  - supporting_type
  - extension
  - preview_provider
  - library_content_provider
function_parameter_count:
  warning: 6
indentation_width:
  indentation_width: 2
  include_multiline_strings: false
line_length:
  ignores_multiline_strings: true
  ignores_regex_literals: true
modifier_order:
  preferred_modifier_order:
  - acl
  - setterACL
  - override
  - isolation
  - dynamic
  - mutators
  - lazy
  - final
  - required
  - convenience
  - typeMethods
  - owned
multiline_arguments:
  first_argument_location: next_line
non_optional_string_data_conversion:
  include_variables: true
number_separator:
  minimum_length: 6
opening_brace:
  ignore_multiline_statement_conditions: true
operator_usage_whitespace:
  skip_aligned_constants: false
prefer_key_path:
  restrict_to_standard_functions: false
private_over_fileprivate:
  validate_extensions: true
redundant_self:
  only_in_closures: false
redundant_type_annotation:
  consider_default_literal_types_redundant: true
trailing_comma:
  mandatory_comma: true
trailing_whitespace:
  ignores_comments: false
type_contents_order:
  order:
  - case
  - associated_type
  - type_alias
  - subtype
  - type_property
  - instance_property
  - ib_inspectable
  - ib_outlet
  - initializer
  - deinitializer
  - type_method
  - view_life_cycle_method
  - ib_action
  - other_method
  - subscript
unneeded_override:
  affect_initializers: true
unused_import:
  require_explicit_imports: true
  allowed_transitive_imports:
  - module: Darwin
    allowed_transitive_imports:
    - _DarwinFoundation1
    - _DarwinFoundation2
    - _DarwinFoundation3
  - module: Swift
    allowed_transitive_imports:
    - _Concurrency
    - _StringProcessing
vertical_whitespace_between_cases:
  separation: never

Are you using nested configurations?

No

[SimplyDanny]

That's not special to unused_declaration. The disabled region always starts right after the swiftlint:disable command, not before it. The disable and enable commands basically wrap the region.