swiftlang/swift

Bad diagnostic for `any P!`

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#72 662 ouverte le 28 mars 2024

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 (6 commentaires) (0 réactions) (2 assignés)Swift (10 719 forks)batch import
TypeResolverbugcompilerdiagnostics qualityexistentialsgood first issueimplicitly unwrapped optionalsswift 6.0type checkertypesunexpected behavior

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Description

Description

No response

Reproduction

protocol P {}

// error: using '!' is not allowed here; perhaps '?' was intended? [implicitly_unwrapped_optional_in_illegal_position]
// error: optional 'any' type must be written '(any P2)?' [incorrect_optional_any]
let _: any P!

Expected behavior

A single error, optional 'any' type must be written '(any P)!', as in the case of let _: any P?.

Environment

Swift version 6.0-dev (LLVM 48dc0c6fa01ce9e, Swift 19fbe5b33d423d1) Target: x86_64-apple-macosx14.0

Additional information

This https://github.com/apple/swift/labels/good%20first%20issue will suit an experienced Swift user.

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