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https://github.com/vercel-labs/scriptc.git
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Chris Tate
5966f23bd3
`C.call(...)` through a class value typed as `Base` may run a subclass's own static `call`, which Node calls instead of the class constructor. The constructor-call lowering now applies only when no class the receiver can hold declares a static `call` or `apply`: the class and its bases (any static member of that name, including accessors, fields without initializers and computed names), and, for a receiver that may hold a subclass, every subclass. Otherwise the call keeps its existing diagnostic.
16 lines
456 B
TypeScript
16 lines
456 B
TypeScript
// Through a class value that may hold a subclass, `C.call(...)` reaches the
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// subclass's own static `call` when it declares one, so the call is not the
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// constructor call that throws Node's TypeError.
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class Base {
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n = 1;
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}
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class OwnCall extends Base {
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static call(value: unknown): string {
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return `own call ${typeof value}`;
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}
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}
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function callThrough(C: typeof Base): unknown {
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return C.call(new Base());
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}
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console.log(callThrough(OwnCall));
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