No Grouping Extension

Extensions shouldn't be used to group code within the same source file.

• Identifier: no_grouping_extension
• Enabled by default: Disabled
• Supports autocorrection: No
• Kind: idiomatic
• Analyzer rule: No
• Minimum Swift compiler version: 3.0.0
• Default configuration: warning

Non Triggering Examples

protocol Food {}
extension Food {}

class Apples {}
extension Oranges {}

class Box<T> {}
extension Box where T: Vegetable {}

Triggering Examples

enum Fruit {}
↓extension Fruit {}

↓extension Tea: Error {}
struct Tea {}

class Ham { class Spam {}}
↓extension Ham.Spam {}

extension External { struct Gotcha {}}
↓extension External.Gotcha {}