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[SR-11174] Protocols should allow constants #53571

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swift-ci opened this issue Jul 22, 2019 · 4 comments
Open

[SR-11174] Protocols should allow constants #53571

swift-ci opened this issue Jul 22, 2019 · 4 comments
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compiler The Swift compiler in itself feature A feature request or implementation improvement

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@swift-ci
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Previous ID SR-11174
Radar None
Original Reporter ColinRoache (JIRA User)
Type Improvement
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Improvement, LanguageFeatureRequest
Assignee None
Priority Medium

md5: b10bcaf85d0a621527517f80bf2cbfc4

Issue Description:

Protocols currently support functions and variables. The use of a let in a protocol leads to LLVM suggesting use of a var with a get, however this is not equivalent. A synthetic variable with a getter can change over time whereas a let cannot, and each has different implications. This restrictions feels like leftovers from Objective-C protocols.

It would be useful to allow constants in protocols!
@belkadan
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This would have to go through the Swift Evolution Process.

@belkadan
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You should be able to sign up just with email. (My account's an email-only account.)

@belkadan
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You should be able to sign up [for the forums or for Jira] with just email.

@belkadan
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…unless by "suggestion" you mean "pull request", in which case "no, but sure, one of us can do it on your behalf, as long as it's a one-off thing".

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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@belkadan @swift-ci