Microsoft/TypeScript

[ID-Prep] Explicit type annotation of const replaced with initializer in declaration emit

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#57,442 opened on 2024年2月19日

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Domain: flag: isolatedDeclarationsHelp WantedPossible Improvement

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説明

The [ID-prep] set of issues aligns Declaration Emit with the forthcoming Isolated Declarations feature.

🔎 Search Terms

declarations type annotation const not preserved

🕗 Version & Regression Information

  • This is the behavior in every version I tried

⏯ Playground Link

Playground Link

💻 Code

enum E { "some value" = 1 };
const e: typeof E["some value"] = E["some value"];

🙁 Actual behavior

e is emitted in declarations as declare const e = E["some value"];

🙂 Expected behavior

e should have in declarations the type that was manually declared

Additional information about the issue

No response

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