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Incorrect types from JSDoc /** @type */ tag with rest parameters #39229

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DanielRosenwasser opened this issue Jun 24, 2020 · 0 comments · Fixed by #39473
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Incorrect types from JSDoc /** @type */ tag with rest parameters #39229

DanielRosenwasser opened this issue Jun 24, 2020 · 0 comments · Fixed by #39473
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@ahejlsberg
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Bug A bug in TypeScript Fix Available A PR has been opened for this issue
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TypeScript 4.0.1

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@DanielRosenwasser
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DanielRosenwasser commented Jun 24, 2020 •
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// @ts-check

/**
 * @type {(...args: [string, string] | [number, string, string]) => void}
 */
function foo(...args) {
    
}

args somehow has the type string | number.

https://www.typescriptlang.org/v2/play?ts=4.0.0-dev.20200623&ssl=1&ssc=1&pln=7&pc=2&useJavaScript=true#code/PQKhFgCgAIWgBALgTwA4FNoG8AUA6AgQwCcBzAZwC5oBtcxYgSwDtSAaaep1gXWgB9azAK4BbAEbpiHLi3acGcngEpoAXgB80AG4B7RgBMAvlFjAoAM2HMAxoka7m0C7t34iZclFVZT0f1BGQA
@RyanCavanaugh RyanCavanaugh added the Needs Investigation This issue needs a team member to investigate its status. label Jun 25, 2020
@ahejlsberg ahejlsberg added Bug A bug in TypeScript and removed Needs Investigation This issue needs a team member to investigate its status. labels Jul 7, 2020
@ahejlsberg ahejlsberg added this to the Typescript 4.0.1 milestone Jul 7, 2020
@ahejlsberg ahejlsberg mentioned this issue Jul 7, 2020
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@ahejlsberg ahejlsberg added the Fix Available A PR has been opened for this issue label Jul 7, 2020
@orta orta mentioned this issue Jul 7, 2020
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Properly handle rest parameters in function declarations with @type annotations microsoft/TypeScript
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@DanielRosenwasser @ahejlsberg @RyanCavanaugh