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tests/cases/compiler/keyofDoesntContainSymbols.ts(11,30): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
tests/cases/compiler/keyofDoesntContainSymbols.ts(14,23): error TS2345: Argument of type 'unique symbol' is not assignable to parameter of type '"str" | "num"'.
tests/cases/compiler/keyofDoesntContainSymbols.ts(17,23): error TS2345: Argument of type '0' is not assignable to parameter of type '"str" | "num"'.
==== tests/cases/compiler/keyofDoesntContainSymbols.ts (3 errors) ====
const sym = Symbol();
const num = 0;
const obj = { num: 0, str: 's', [num]: num as 0, [sym]: sym };
function set <T extends object, K extends keyof T> (obj: T, key: K, value: T[K]): T[K] {
return obj[key] = value;
}
const val = set(obj, 'str', '');
// string
const valB = set(obj, 'num', '');
~~
!!! error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
// Expect type error
// Argument of type '""' is not assignable to parameter of type 'number'.
const valC = set(obj, sym, sym);
~~~
!!! error TS2345: Argument of type 'unique symbol' is not assignable to parameter of type '"str" | "num"'.
// Expect type error
// Argument of type 'unique symbol' is not assignable to parameter of type "str" | "num"
const valD = set(obj, num, num);
~~~
!!! error TS2345: Argument of type '0' is not assignable to parameter of type '"str" | "num"'.
// Expect type error
// Argument of type '0' is not assignable to parameter of type "str" | "num"
type KeyofObj = keyof typeof obj;
// "str" | "num"
type Values<T> = T[keyof T];
type ValuesOfObj = Values<typeof obj>;
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