option-t/esm/maybe/maybe.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 { ERR_MSG_UNWRAP_NO_VAL_FOR_MAYBE } from './internal/error_message.js';
export function isNotNullOrUndefined(input) {
    return input !== undefined && input !== null;
}
export function isNullOrUndefined(input) {
    return input === undefined || input === null;
}
/**
 *  Return _input_ as `T` if the passed _input_ is not `null` and `undefined`.
 *  Otherwise, throw `TypeError` with the passed `msg`.
 */
export function expectNotNullOrUndefined(input, msg) {
    if (isNotNullOrUndefined(input)) {
        return input;
    }
    throw new TypeError(msg);
}
/**
 *  Return _value_ as `T` if the passed _value_ is not `null` and `undefined`.
 *  Otherwise, throw `TypeError`.
 */
export function unwrapMaybe(value) {
    return expectNotNullOrUndefined(value, ERR_MSG_UNWRAP_NO_VAL_FOR_MAYBE);
}