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Cargoify servo
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parent
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commit
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1761 changed files with 8423 additions and 2294 deletions
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* vim: set ts=2 sw=2 et tw=79: */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* A struct for tracking exceptions that need to be thrown to JS.
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*/
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#ifndef mozilla_ErrorResult_h
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#define mozilla_ErrorResult_h
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#include "nscore.h"
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#include "mozilla/Assertions.h"
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namespace mozilla {
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class ErrorResult {
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public:
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ErrorResult() {
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mResult = NS_OK;
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}
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void Throw(nsresult rv) {
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MOZ_ASSERT(NS_FAILED(rv), "Please don't try throwing success");
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mResult = rv;
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}
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// In the future, we can add overloads of Throw that take more
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// interesting things, like strings or DOM exception types or
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// something if desired.
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// Backwards-compat to make conversion simpler. We don't call
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// Throw() here because people can easily pass success codes to
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// this.
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void operator=(nsresult rv) {
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mResult = rv;
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}
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bool Failed() const {
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return NS_FAILED(mResult);
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}
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nsresult ErrorCode() const {
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return mResult;
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}
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private:
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nsresult mResult;
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// Not to be implemented, to make sure people always pass this by
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// reference, not by value.
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ErrorResult(const ErrorResult&) MOZ_DELETE;
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};
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} // namespace mozilla
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#endif /* mozilla_ErrorResult_h */
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