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[SR-3423] Enum with tuple raw value not allowed? #46011

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swift-ci opened this issue Dec 15, 2016 · 1 comment
Open

[SR-3423] Enum with tuple raw value not allowed? #46011

swift-ci opened this issue Dec 15, 2016 · 1 comment
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compiler The Swift compiler in itself feature A feature request or implementation swift evolution proposal needed Flag → feature: A feature that warrants a Swift evolution proposal

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Previous ID SR-3423
Radar rdar://problem/28249531
Original Reporter chung (JIRA User)
Type New Feature
Additional Detail from JIRA
Votes 2
Component/s Compiler
Labels New Feature, LanguageFeatureRequest
Assignee None
Priority Medium

md5: e69fffd31407e0ea9ed08f51b431c806

Issue Description:

Please see this question on SO: http://stackoverflow.com/questions/26387275/enum-of-tuples-in-swift

The OP was trying to do something like this:

enum ErrorCode: (Int, String) {
    case Generic_Error = (0, "Unknown")
    case DB_Error = (909, "Database")
}

Looks perfectly reasonable, but won't compile.
@swift-ci
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Comment by Raphael (JIRA)

If we do typealias A = (Int, String) and ErrorCode: A we get past the syntax error and get:

raw type 'A' (aka '(Int, String)') is not expressible by any literal

That's just plain wrong; at least, I'd consider (1,"2") to be a literal.

But, of course, we don't only get one error but also this:

type 'ErrorCode' does not conform to protocol 'RawRepresentable'

which seems redundant.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added swift evolution proposal needed Flag → feature: A feature that warrants a Swift evolution proposal and removed new feature labels Nov 10, 2022
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compiler The Swift compiler in itself feature A feature request or implementation swift evolution proposal needed Flag → feature: A feature that warrants a Swift evolution proposal
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