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[SR-6273] Disallow unconstructible infinite value types #48823

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jckarter opened this issue Nov 1, 2017 · 3 comments
Closed

[SR-6273] Disallow unconstructible infinite value types #48823

jckarter opened this issue Nov 1, 2017 · 3 comments
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@AnthonyLatsis
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself good first issue Good for newcomers

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@jckarter
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jckarter commented Nov 1, 2017

Previous ID SR-6273
Radar rdar://problem/21926802
Original Reporter @jckarter
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, StarterBug
Assignee @AnthonyLatsis
Priority Medium

md5: 9ba68b3c815d542535d6d965fd591b35

Issue Description:

The type checker disallows value types with infinite storage, but not value types with indirected storage but which are still unconstructibly infinite. For example:

enum E {
  indirect case X(E)
}
@swift-ci
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Comment by Yuka Ezura (JIRA)

I tried to resolve this issue.
But while working on, I found we need to support some cases... (For example, the following codes)

// OK
enum E {
    indirect case x(Array<E>)
}
// OK
enum E {
    indirect case x(S)
}

struct S {
    let e: E?
}

Anyway, I will continue to think about this issue.

@AnthonyLatsis
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#16987

@AnthonyLatsis
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Made into a warning; not exhaustive for that reason – simple cases handled when the recursions are directly among the associated values.

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

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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself good first issue Good for newcomers
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@jckarter @swift-ci @AnthonyLatsis