option-t
Version:
A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.
17 lines (16 loc) • 677 B
JavaScript
import { ERR_MSG_DEFAULT_VALUE_MUST_NOT_BE_NO_VAL_FOR_MAYBE } from './internal/error_message.js';
import { isNotNullOrUndefined, expectNotNullOrUndefined, } from './maybe.js';
/**
* Return _input_ as `T` if the passed _input_ is not `null` and `undefined`.
* Otherwise, return _defaultValue_.
*
* * _defaultValue_ must not be `Maybe<*>`.
* * If the _defaultValue_ is `null` or `undefined`, throw `TypeError`.
*/
export function unwrapOrForMaybe(input, defaultValue) {
if (isNotNullOrUndefined(input)) {
return input;
}
const passed = expectNotNullOrUndefined(defaultValue, ERR_MSG_DEFAULT_VALUE_MUST_NOT_BE_NO_VAL_FOR_MAYBE);
return passed;
}