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error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
==== tests/cases/compiler/mappedTypeUnionConstraintInferences.ts (0 errors) ====
export declare type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
export declare type PartialProperties<T, K extends keyof T> = Partial<Pick<T, K>> & Omit<T, K>;
export function doSomething_Actual<T extends {
prop: string;
}>(a: T) {
const x: { [P in keyof PartialProperties<T, "prop">]: PartialProperties<T, "prop">[P]; } = null as any;
return x;
}
export declare function doSomething_Expected<T extends {
prop: string;
}>(a: T): { [P in keyof PartialProperties<T, "prop">]: PartialProperties<T, "prop">[P]; };
export let a = doSomething_Actual({ prop: "test" });
a = {} // should be fine, equivalent to below
export let b = doSomething_Expected({ prop: "test" });
b = {} // fine
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