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// @strict: true
type Model = {
a: string;
b: number;
};
type MappedModel<Suffix extends string> = {
[K in keyof Model as `${K}${Suffix}`]: Model[K];
};
const foo1: MappedModel<'Foo'> = { aFoo: 'test', bFoo: 42 };
const foo2: MappedModel<'Foo'> = { bFoo: 'bar' }; // Error
function f1<T extends string>() {
const x1: MappedModel<T> = 42; // Error
const x2: MappedModel<T> = 'test'; // Error
const x3: MappedModel<T> = [1, 2, 3]; // Error
const x4: MappedModel<T> = false; // Error
const x5: MappedModel<T> = { a: 'bar', b: 42 }; // Error
const x6: MappedModel<T> = undefined; // Error
}
// repro from #43189
type RemapRecord<K extends keyof any, V> = { [_ in never as K]: V }
interface RecordInterface2<K extends keyof any, V> extends RemapRecord<K, V> {} // should error
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