Swift 5’s brand new Result Type
summary
Demo code shows Swift 5 adds an official Result type in Swift 5 that unifies success and failure into a single return type, with failure constrained to failure: Error-constrained values. Examples build doubled/plusOne functions, a pipe operator, and custom map and flatMap implementations to chain results without crashes or nested wrappers. Claim: it behaves like optionals for chaining but preserves error detail so try/catch decisions can be deferred; the stdlib version actually lands and works.
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chapters (7)
- 0:00Start
- 1:57Approach Using Url Session
- 3:29Fatal Error
- 7:36Fatal Errors
- 7:57Optionals
- 10:31Map Operator
- 18:23Result Type
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