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'infer' type parameters declarations aren't printed in quick info. #21836

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'infer' type parameters declarations aren't printed in quick info.#21836
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BugA bug in TypeScriptDomain: LS: Quick FixesEditor-provided fixes, often called code actions.Domain: LS: Quick Infoe.g. hover text, tool-tips, and tooltips.Effort: DifficultGood luck.FixedA PR has been merged for this issue
Milestone
TypeScript 3.2

Description

@DanielRosenwasser
Daniel Rosenwasser (DanielRosenwasser)
opened on Feb 9, 2018

Found by Wesley Wigham (@weswigham)

type Alias<T> = T extends (infer U)[] ? U : never;

Request quick info on Alias.

Expected: type Alias<T> = T extends (infer U)[] ? U : never

Actual: type Alias<T> = T extends U[] ? U : never

Activity

  1. Daniel Rosenwasser (DanielRosenwasser)
    added
    BugA bug in TypeScript
    on Feb 9, 2018
  2. Mohamed Hegazy (mhegazy)
    self-assigned this
    on Feb 9, 2018
  3. Mohamed Hegazy (mhegazy)
    added this to the TypeScript 2.8 milestone on Feb 9, 2018
  4. Mohamed Hegazy (mhegazy)
    added
    Domain: LS: Quick FixesEditor-provided fixes, often called code actions.
    and removed
    Domain: LS: Quick FixesEditor-provided fixes, often called code actions.
    on Feb 12, 2018
  5. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 2.8, TypeScript 2.9 on Mar 9, 2018
  6. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 2.9, TypeScript 3.0 on Apr 26, 2018
  7. Daniel Rosenwasser (DanielRosenwasser)
    added
    Domain: LS: Quick Infoe.g. hover text, tool-tips, and tooltips.
    on May 24, 2018
  8. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 3.0, Future on Jul 2, 2018
  9. Daniel Rosenwasser (DanielRosenwasser)
    assigned
    Wesley Wigham (weswigham)
    and unassigned
    Mohamed Hegazy (mhegazy)
    on Oct 9, 2018
  10. Daniel Rosenwasser (DanielRosenwasser)
    modified the milestones: Future, TypeScript 3.2 on Oct 9, 2018
  11. Daniel Rosenwasser (DanielRosenwasser)
    modified the milestones: TypeScript 3.2, TypeScript 3.3 on Oct 30, 2018
  12. Daniel Rosenwasser (DanielRosenwasser)
    added
    Effort: DifficultGood luck.
    on Oct 30, 2018

  13. Kingwl commented on Dec 4, 2018

    @Kingwl
    Wenlu Wang (Kingwl)
    on Dec 4, 2018
    Contributor

    seems already fixed, doesn't it?
    image

  14. DanielRosenwasser commented on Dec 4, 2018

    @DanielRosenwasser
    Daniel Rosenwasser (DanielRosenwasser)
    on Dec 4, 2018
    MemberAuthor

    Good catch!

  15. Daniel Rosenwasser (DanielRosenwasser)
    added
    FixedA PR has been merged for this issue
    on Dec 4, 2018
  16. Daniel Rosenwasser (DanielRosenwasser)
    unassigned
    Wesley Wigham (weswigham)
    on Dec 4, 2018
  17. Daniel Rosenwasser (DanielRosenwasser)
    modified the milestones: TypeScript 3.3.0, TypeScript 3.2 on Dec 4, 2018
  18. Ryan Cavanaugh (RyanCavanaugh)
    closed this as completedon Jun 12, 2019
  19. microsoft
    locked as resolved and limited conversation to collaborators on Oct 21, 2025
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    BugA bug in TypeScriptDomain: LS: Quick FixesEditor-provided fixes, often called code actions.Domain: LS: Quick Infoe.g. hover text, tool-tips, and tooltips.Effort: DifficultGood luck.FixedA PR has been merged for this issue

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