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Apple didn't fix Swift's biggest flaw (danielchasehooper.com)

submitted 3 months ago by [email protected] to c/[email protected]

1 comments fedilink

“The Swift compiler is notoriously slow due to how types are inferred. Every June I hope that Apple will announce that they fixed it; sadly this is not that year.”

The Swift compiler is slow due to how types are inferred (danielchasehooper.com)

submitted 3 months ago by [email protected] to c/[email protected]

0 comments fedilink

HN Discussion

The Swift compiler is slow due to how types are inferred (danielchasehooper.com)

submitted 3 months ago by [email protected] to c/[email protected]

1 comments fedilink

A notable case study for anyone designing a type system for their own language.

Swift's compiler can infer ambiguous expressions like enum case names based on their type, inferred from surrounding context. This makes the syntax less verbose, but at a cost; some seemingly benign expressions take several seconds to type-check, after which the compiler ultimately gives up with an unhelpful error message: "the compiler is unable to type-check this expression in reasonable time".

The linked post goes into more detail.