option-t/esm/undefinable/operators/unwrap_or.js

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

import { isNotUndefined, expectNotUndefined, } from '../core/undefinable.js';
import { ERR_MSG_DEFAULT_VALUE_MUST_NOT_BE_NO_VAL_FOR_UNDEFINABLE } from '../internal/error_message.js';
/**
 *  Return _input_ as `T` if the passed _input_ is not `undefined`.
 *  Otherwise, return _defaultValue_.
 *
 *  * _defaultValue_ must not be `Undefinable<*>`.
 *  * If the result of _defaultValue_ is `undefined`, throw `TypeError`.
 */
export function unwrapOrForUndefinable(input, defaultValue) {
    if (isNotUndefined(input)) {
        return input;
    }
    const passed = expectNotUndefined(defaultValue, ERR_MSG_DEFAULT_VALUE_MUST_NOT_BE_NO_VAL_FOR_UNDEFINABLE);
    return passed;
}