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Generics return type check with arrow functions #13631

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Generics return type check with arrow functions#13631
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@zerkms
Ivan Kurnosov (zerkms)
opened on Jan 23, 2017

TypeScript Version: playground (2.1.4-insiders.20161201)

Code

let f1: <T>(a: T) => T = a => 42;

function f2<T>(a: T): T {
    return 42;
};

Expected behavior:

Since those functions are identical I expect both to behave the same: to fail the type check.

Actual behavior:

The f1 type checks fine.

Activity

  1. mhegazy commented on May 18, 2017

    @mhegazy
    Mohamed Hegazy (mhegazy)
    on May 18, 2017
    Contributor

    Duplicate of #5616

  2. Mohamed Hegazy (mhegazy)
    added
    DuplicateAn existing issue was already created
    on May 18, 2017
  3. Mohamed Hegazy (mhegazy)
    closed this as completedon May 18, 2017
  4. microsoft
    locked and limited conversation to collaborators on Jun 19, 2018
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