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option-t

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

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import { isCurrentRealmErrorInstance } from '../../internal/assert.js'; import { ERR_MSG_DOT_CAUSE_PROPS_IS_NOT_CURRENT_REALM_BUILTIN_ERROR_INSTANCE } from './error_message.js'; const WRAPPER_NAME = 'UnknownCausalError'; export class UnknownCausalError extends Error { constructor(cause) { super(ERR_MSG_DOT_CAUSE_PROPS_IS_NOT_CURRENT_REALM_BUILTIN_ERROR_INSTANCE, { cause, }); this.name = WRAPPER_NAME; } } export function wrapWithNewErrorIfCausalIsUnknown(e) { if (isCurrentRealmErrorInstance(e)) { return e; } const wrapper = new UnknownCausalError(e); return wrapper; }