A Secret Swift Tour
summary
Shows that assignment expressions can return Optionals and that defining an operator with assignment: true operator flag makes a custom + behave like = when left side is optional; demonstrates using an immediate-void-closure placeholder to hold a non-nil value during setup; explores how function objects are created from plain functions, methods, initializers and enum accessors; experiments reveal copy-in copy-out for inout (reimplementing x++ with defer) and that defer executes at scope exit can trigger unexpected willSet calls in initializers — a behavior reported as a bug.
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chapters (6)
- 0:00Introduction Swift perspective
- 1:17Assignment operator behavior
- 8:40Closures and functions
- 12:53inout argument differences
- 17:44defer block quirks
- 22:55defer deep impact summary
