💊 Syntactic sugar for Swift do-try-catch

Related tags

Code Quality Fallback
Overview

Fallback

Swift Build Status CocoaPods Carthage compatible

Syntactic sugar for Swift do-try-catch.

At a Glance

value = try fallback(
  try get("A"),
  try get("B"),
  try get("C"),
  try get("D")
)

is equivalent to:

do {
  value = try get("A")
} catch {
  do {
    value = try get("B")
  } catch {
    do {
      value = try get("C")
    } catch {
      value = try get("D")
    }
  }
}

Installation

  • Using CocoaPods:

    pod 'Fallback', '~> 0.2'

  • Using Carthage:

    github "devxoul/Fallback" ~> 0.2

  • Using Swift Package Manager:

    import PackageDescription

let package = Package(
  name: "MyAwesomeProject",
  targets: [],
  dependencies: [
    .Package(url: "https://github.com/devxoul/Fallback.git", majorVersion: 0)
  ]
)

License

Fallback is under MIT license. See the LICENSE file for more info.

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Comments
  • Add support chaining

    Add support chaining

    This is for whom wants handle each errors.

    From the comment from Reddit:

    Keeps it short and sweet. My biggest concern is that it's limiting errors to control flow. If get("A") and get("B") fail and we get("C") instead, what happened to the errors from the previous 2 calls? It looks to me like it only throws the last error.

    Examples

    let value: String = fallback {
  return try get("a")
}.catch { error in // error from "a"
  return try get("b")
}.catch { error in // error from "b"
  return try get("c")
}.finally { error in // error from "c"
  return "none"
}
print(value) // "none"

    let value: String = try fallback {
  return try get("a")
}.catch { error in // error from "a"
  return try get("b")
}.catch { error in // error from "b"
  return try get("c")
}.rethrow() // will throw error from "c"

    To Do

    • [x] Implement
    • [x] Test
    • [ ] Documentation
    opened by devxoul 0
Releases(0.2.0)
Owner
Suyeol Jeon
A lazy developer 😴 I write many code to write less code.
Suyeol Jeon
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