Swift shortcut for returning and/or assigning the result of switch statement?

switch-shortcut.swift

// Can currently do this
func titleForSection1(section: Int) -> String? {
  switch section {
  case 0: return "Foo"
  case 1: return "Bar"
  default: return nil
  }
}

// But I want to do this to remove the redundant returns
func titleForSection2(section: Int) -> String? {
  switch section {
  case 0: "Foo"
  case 1: "Bar"
  default: nil
  }
}

// This would be fine too
func titleForSection2(section: Int) -> String? {
  let title = switch section {
    case 0: "Foo"
    case 1: "Bar"
    default: nil
  }
  
  return title
}

// Or this if it worked
func titleForSection2(section: Int) -> String? {
  let title = {
    switch section {
    case 0: "Foo"
    case 1: "Bar"
    default: nil
    }
  }()
  
  return title
}

// @jspahrsummers points out this works for more convenient assignment
func titleForSection2(section: Int) -> String? {
  let title = {
    switch section {
    case 0: return "Foo"
    case 1: return "Bar"
    default: return nil
    }
  }()
  
  return title
}

Came across the need to assign and return according to enum values recently.

Someone should propose a switch expression equivalent on Swift Evolution. Basically it enables:

// If implemented in Swift syntax:

return section switch {
  0 => "Foo"
  1 => "Bar"
  default => nil
}

Or when doing assignments:

let title = section switch {
  0 => "Foo"
  1 => "Bar"
  default => nil
}

Swift evolution accepted: https://github.com/apple/swift-evolution/blob/main/proposals/0380-if-switch-expressions.md