option-t/esm/internal/assert.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_INPUT_IS_FROZEN_NOT_CAST_TO_MUTABLE } from './error_message.js';
export function isCurrentRealmErrorInstance(input) {
    const ok = input instanceof Error;
    return ok;
}
export function assertIsErrorInstance(input, message) {
    if (isCurrentRealmErrorInstance(input)) {
        return;
    }
    // We don't throw Node's AssertionError because the code size will be larger.
    const e = new TypeError(message, {
        cause: input,
    });
    throw e;
}
export function assertIsNotFrozen(input) {
    if (Object.isFrozen(input)) {
        throw new TypeError(ERR_MSG_INPUT_IS_FROZEN_NOT_CAST_TO_MUTABLE);
    }
}