Skip to content

[Bug] Generic type extending an Array can not be used as rest params #38767

Closed
Closed
[Bug] Generic type extending an Array can not be used as rest params#38767
Labels
DuplicateAn existing issue was already created

Description

@bogdan
Bogdan Gusiev (bogdan)
opened on May 25, 2020

TypeScript Version: 3.9.3

Search Terms:

  • Rest element type
  • Generics

Code

type E<T extends any[]> = [...T]

Expected behavior:

No compilation error.

Actual behavior:

2574: A rest element type must be an array type.

Playground Link:

https://www.typescriptlang.org/play?#code/C4TwDgpgBAogPAFShAHsCA7AJgZygQwxAG0BdAPigF4piA6BhUgbgChWg

Activity

  1. ahejlsberg commented on May 25, 2020

    @ahejlsberg
    Anders Hejlsberg (ahejlsberg)
    on May 25, 2020
    Member

    Duplicate of #26113.

  2. Anders Hejlsberg (ahejlsberg)
    added
    DuplicateAn existing issue was already created
    on May 25, 2020
  3. Bogdan Gusiev (bogdan)
    closed this as completedon May 26, 2020
  4. microsoft
    locked as resolved and limited conversation to collaborators on Oct 21, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    DuplicateAn existing issue was already created

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions