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Mark unused infer type parameter #25594

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Closed
Mark unused infer type parameter#25594
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FixedA PR has been merged for this issueSuggestionAn idea for TypeScript
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TypeScript 3.1

Description

@ghost
ghost
opened on Jul 12, 2018

TypeScript Version: 3.0.0-dev.20180711

Code

type Something<T> = T extends infer U ? number : string;

Expected behavior:

U marked unused.

Actual behavior:

No error.

Activity

  1. ghost added
    SuggestionAn idea for TypeScript
    on Jul 12, 2018
  2. ghost
    self-assigned this
    on Jul 12, 2018
  3. Mohamed Hegazy (mhegazy)
    added this to the TypeScript 3.1 milestone on Jul 12, 2018
  4. ghost added
    FixedA PR has been merged for this issue
    on Jul 18, 2018
  6. ghost closed this as completedon Jul 27, 2018
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