[SR-4845] Irrelevant elements when autocompleting enum cases

[NachoSoto]

Previous ID	SR-4845
Radar	None
Original Reporter	@NachoSoto
Type	Bug

Attachment: Download

Environment

Swift version 3.1 (swiftlang-802.0.53 clang-802.0.42)
Swift version 4.0.2 (swiftlang-900.0.69.1 clang-900.0.38)

Additional Detail from JIRA

Votes	0
Component/s	CodeCompletion, Compiler
Labels	Bug, TypeChecker
Assignee	@nkcsgexi
Priority	Medium

md5: 3f5617c817e3a5ad98b2f2fe12db4c38

Issue Description:

Write the following code on Xcode:

enum E {
    case a
    case b
    case c
}

struct S {
    let e: E = .a
}

var s = S()
s.e = .

Expected results:

Only a, b, and c are displayed.

Actual result:

[NachoSoto]

This is not a regression btw, I've seen this for as long as I can remember, I just never bothered to file it...

[NachoSoto]

This seems fixed in Swift 4.0. Given that this bug wasn't screened though I wonder if there are regression tests for this though?

[slavapestov]

@nkcsgexi Can you check if there's a regression test and add one if there isn't?

[NachoSoto]

This is broken again

[nkcsgexi]

@slavapestov We do have test on this case: https://github.com/apple/swift/blob/master/test/IDE/complete_enum_elements.swift

Could you attach the source file for reproducing? I cannot reproduce locally with a toy example.

[AnthonyLatsis]

@NachoSoto Can you verify whether the issue is still present in the latest Xcode release? We do indeed have quite some test cases for this in the file mentioned by Xi