25 lines
537 B
TypeScript
25 lines
537 B
TypeScript
interface RelationFields {
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x: A;
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y: A[];
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z: A[];
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}
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type Name = keyof RelationFields;
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type ShouldA<RF extends RelationFields, N extends Name> = RF[N] extends A[]
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? RF[N][0]
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: never;
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class A {
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x: A;
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y: A[];
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z: A[];
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whereRelated< // Works // Type is same as A1, but is not assignable to type A
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RF extends RelationFields = RelationFields,
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N extends Name = Name,
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A1 extends A = RF[N] extends A[] ? RF[N][0] : never,
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A2 extends A = ShouldA<RF, N>
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>(): number {
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return 1;
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}
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}
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