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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef DOM_INDEXEDDB_TRANSACTION_OP_RESULT_H_
#define DOM_INDEXEDDB_TRANSACTION_OP_RESULT_H_
#include "nsError.h"
#include "nsString.h"
namespace IPC {
template <typename>
struct ParamTraits;
} // namespace IPC
namespace mozilla::dom::indexedDB {
// Struct to carry over nsresult and potential error message from the parent
// process to the child process. As an early async Web API, IndexedDB is unique
// in directly exposing DOMException instances rather than throwing them or
// rejecting them on promises. Because ErrorResult infrastructure is strongly
// biased towards throwing/rejecting and does not provide a way to re-extract a
// DOMException and it was felt introducing one might create a footgun, we've
// introduced TransactionOpResult as a simple means to transport the result code
// and messages for the DOMExceptions IndexedDB emits.
struct TransactionOpResult {
nsresult mCode;
nsCString mErrorMessage;
// Note: the constructors clamps aCode to valid NS_ERROR_DOM_INDEXEDDB_*
// values (see ClampResultCode)
MOZ_IMPLICIT TransactionOpResult(nsresult aCode = NS_OK);
// Use this constructor only when there is an error (i.e. aCode != NS_OK)
// for which you would like to a custom and meaningful error message to the
// developers.
TransactionOpResult(nsresult aCode, const nsACString& aErrorMessage);
friend struct IPC::ParamTraits<TransactionOpResult>;
};
} // namespace mozilla::dom::indexedDB
#endif // DOM_INDEXEDDB_TRANSACTION_OP_RESULT_H_