зеркало из https://github.com/mozilla/gecko-dev.git
38 строки
1.1 KiB
C
38 строки
1.1 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Extensions to the Result type to enable simpler handling of XPCOM/NSPR results. */
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#ifndef mozilla_ResultExtensions_h
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#define mozilla_ResultExtensions_h
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#include "mozilla/Assertions.h"
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#include "nscore.h"
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namespace mozilla {
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// Allow nsresult errors to automatically convert to nsresult values, so MOZ_TRY
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// can be used in XPCOM methods with Result<T, nserror> results.
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template <>
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class MOZ_MUST_USE_TYPE GenericErrorResult<nsresult>
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{
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nsresult mErrorValue;
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template<typename V, typename E2> friend class Result;
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public:
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explicit GenericErrorResult(nsresult aErrorValue) : mErrorValue(aErrorValue)
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{
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MOZ_ASSERT(NS_FAILED(aErrorValue));
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}
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operator nsresult() { return mErrorValue; }
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};
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} // namespace mozilla
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#endif // mozilla_ResultExtensions_h
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