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Use 'abstract new' in InstanceType and ConstructorParameters by rbuckton · Pull Request #43380 · microsoft/TypeScript · GitHub
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Use 'abstract new' in InstanceType and ConstructorParameters #43380

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Merged
merged 1 commit into from
Mar 25, 2021
Merged

Use 'abstract new' in InstanceType and ConstructorParameters #43380

merged 1 commit into from
Mar 25, 2021

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@rbuckton
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This finishes up the remaining work from #36392 to update ConstructorParameters and InstanceType to use abstract constructor types so that you can retrieve parameter lists and instance types from abstract classes:

abstract class C {
  constructor(x: number) {}
}

// before: error
// after: [x: number]
type P = ConstructorParameters<C>;

// before: error
// after: C
type I = InstanceType<C>;

@typescript-bot typescript-bot added Author: Team For Uncommitted Bug PR for untriaged, rejected, closed or missing bug labels Mar 25, 2021
This was referenced Mar 25, 2021
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@rbuckton
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Looks like we still need to update typescript-eslint. Fix for that is up in #43381

weswigham
weswigham approved these changes Mar 25, 2021
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This looks fine, but it looks like our linter does need to get its deps updated first.

@rbuckton
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This looks fine, but it looks like our linter does need to get its deps updated first.

That's what #43381 is for.

@rbuckton rbuckton merged commit e10a325 into master Mar 25, 2021
@rbuckton rbuckton deleted the use-abstract-new branch March 25, 2021 22:27
@microsoft microsoft locked as resolved and limited conversation to collaborators Oct 21, 2025
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@weswigham weswigham weswigham approved these changes

@sandersn sandersn Awaiting requested review from sandersn

@ahejlsberg ahejlsberg Awaiting requested review from ahejlsberg

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@rbuckton rbuckton

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@rbuckton @weswigham @typescript-bot