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Enum members aren't subtype reduced in unions #10

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DanielRosenwasser opened this issue Jul 16, 2020 · 2 comments
Open

Enum members aren't subtype reduced in unions #10

DanielRosenwasser opened this issue Jul 16, 2020 · 2 comments
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has repro indicates there's a twoslash repro in the issue

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@DanielRosenwasser
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enum E {
    A,
    B,
    C,
}

function f(x: E | undefined) {
//       ^?
    return x ?? E.C;
}

Workbench Repro
@DanielRosenwasser DanielRosenwasser added the has repro indicates there's a twoslash repro in the issue label Jul 16, 2020
@DanielRosenwasser
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microsoft/TypeScript#35867

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typescript-bot commented Apr 13, 2022 •
edited
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👋 Hi, I'm the Repro bot. I can help narrow down and track compiler bugs across releases! This comment reflects the current state of the repro in the issue body running against the nightly TypeScript.

Issue body code block by @DanielRosenwasser

⚠️ Assertions:

  • function f(x: E | undefined): E

Historical Information
Version Reproduction Outputs
4.2.2, 4.3.2, 4.4.2, 4.5.2, 4.6.2

⚠️ Assertions:

  • function f(x: E | undefined): E

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