Swiftのエラー4分類が素晴らしすぎるのでみんなに知ってほしい - Qiita
これは Swift Tweets の発表をまとめたものです（次回開催はこちら）。イベントのスポンサーとして Qiita に許可をいただいた上で投稿しています。 ありがとうございました！Q&Aは他の人の発表中でも構わないのでリプを飛ばして下さい。 続いては僕 @koher の発表で、タイトルは "Swiftのエラー4分類が素晴らしすぎるのでみんなに知ってほしい" です。 #swtws — koher (@koher) 2017年1月14日 第 1 部: Swift の 4 種類のエラーについて あまり知られてませんが、エラー処理について、 Swift 2.0 設計時に Core Team がまとめた "Error Handling Rationale and Proposal" というドキュメントがあります。このドキュメントは、僕が去年 try! Swift で発表した際にも参考文献にしまし
Swift 2 Error Handling in Practice
Presented @ Swift 2 Symposium #2
Swift Error Handling and Objective-C Interop in Depth · [Thinking inside a large box];
For the impatient reader: TL;DR The ErrorType protocol has hidden requirements that are automatically fullfilled if you use an enum to implement the protocol Objective-C methods can only be translated to Swift’s error handling mechanism if they return Objective-C objects or boolean values Swift will invoke the catch block if the Objective-C method returns nil/false, independent of whether an NSErr
Error Handling
Error Handling There is a new edition of the book and this is an old link. Rust groups errors into two major categories: recoverable errors with Result<T, E> and unrecoverable errors with panic!. Here are the relevant sections in the new and old books: in the current edition: Ch 9.00 — Error Handling In the first edition: Ch 4.7 — Error Handling
Swift 2 error handling in practice | Sunset Lake Software
This week, Apple enhanced Swift with several additions or changes, bumping it to version 2. Perhaps the biggest change was the introduction of an official error-handling model based on try/catch semantics. At first, I was skeptical about this approach when compared to other techniques (primarily the use of a Result<T,U> return value), but after applying it to real-world code, I've found it to work
Swift 2でエラーをthrowする関数からEitherを作る - Qiita
タイトルではEitherといいながら片方がErrorType決め打ちなのでFailable型ということで。 enum Failable<T> { case Success(T) case Failure(ErrorType) init(@autoclosure _ f: () throws -> T) { do { self = .Success(try f()) } catch { self = .Failure(error) } } } enum MyError : ErrorType { case ParseIntError(String) case PatternNotFoundError(String, String) } func parseInt(text: String) throws -> Int { if let num = Int(text) { return num
Error Handling in Swift
Update, August 22nd, 2014: Please see Error Handling – Take Two for some updated insights. It may be the case that named tuples are the right approach to solve this problem. : .info Error handling is something that seems to be have been left to the coder to figure out for Swift. Yes, there is the overly clunky and terribly awkward NSError usage: func contentsForType(typeName: String, error: NSErro
Meta for Developers
Looking for information on expired access tokens? Try our documentation on the topic. One of the most frequently asked for “How-To” requests from developers is how to handle invalid access tokens. Access tokens for users can become invalid due to various reasons. In most cases, they can expire if it’s past the time specified by the ‘expires’ field (by default access token have a 2 hour lifetime).
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Swift 2 - Error Handling
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