Closure Parameter Position

Closure parameters should be on the same line as opening brace

• Identifier: closure_parameter_position
• Enabled by default: Yes
• Supports autocorrection: No
• Kind: style
• Analyzer rule: No
• Minimum Swift compiler version: 5.0.0
• Default configuration:

  Key	Value
  severity	warning

Non Triggering Examples

[1, 2].map { $0 + 1 }

[1, 2].map({ $0 + 1 })

[1, 2].map { number in
 number + 1 
}

[1, 2].map { number -> Int in
 number + 1 
}

[1, 2].map { (number: Int) -> Int in
 number + 1 
}

[1, 2].map { [weak self] number in
 number + 1 
}

[1, 2].something(closure: { number in
 number + 1 
})

let isEmpty = [1, 2].isEmpty()

rlmConfiguration.migrationBlock.map { rlmMigration in
    return { migration, schemaVersion in
        rlmMigration(migration.rlmMigration, schemaVersion)
    }
}

let mediaView: UIView = { [weak self] index in
   return UIView()
}(index)

Triggering Examples

[1, 2].map {
    ↓number in
    number + 1
}

[1, 2].map {
    ↓number -> Int in
    number + 1
}

[1, 2].map {
    (↓number: Int) -> Int in
    number + 1
}

[1, 2].map {
    [weak ↓self] ↓number in
    number + 1
}

[1, 2].map { [weak self]
    ↓number in
    number + 1
}

[1, 2].map({
    ↓number in
    number + 1
})

[1, 2].something(closure: {
    ↓number in
    number + 1
})

[1, 2].reduce(0) {
    ↓sum, ↓number in
    number + sum
})

f.completionHandler = {
    ↓thing in
    doStuff()
}

foo {
    [weak ↓self] in
    self?.bar()
}