Swift Enums: Type-Safe Choice Modeling
A Swift enum is a closed menu of possibilities the compiler tracks exhaustively. Use it to replace string constants or model a network result state. Adding a case without updating every switch breaks compile-time safety if you rely on a default clause.
A Swift enum is a closed menu of related possibilities that the compiler tracks exhaustively, so impossible states cannot be represented. Use it to replace stringly-typed constants, model API responses like success or failure, or build state machines where only one condition is true at a time. The footgun is adding a new case without auditing every switch statement; if you hide unknown cases behind a default clause, the compiler stops warning you and runtime logic silently drifts out of date.
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- #swift
- #enums
- #type-safety
- #compiler
- #state-machine
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