gecko-dev/xpcom/base/nsGZFileWriter.h
Chris Peterson b1f54173e8 Bug 1624776 - Replace MOZ_MUST_USE with [[nodiscard]] in xpcom. r=xpcom-reviewers,KrisWright
Also move MOZ_MUST_USE before function declarations' specifiers and return type. While clang and gcc's __attribute__((warn_unused_result)) can appear before, between, or after function specifiers and return types, the [[nodiscard]] attribute must precede the function specifiers.

Also remove MOZ_MUST_USE from nsIMemoryReporter's function pointer typedefs. [[nodiscard]] is an attribute of a function's declaration, not the function's type, and thus can't be applied to function pointers or lambdas.

Differential Revision: https://phabricator.services.mozilla.com/D68138

--HG--
extra : moz-landing-system : lando
2020-03-27 17:21:48 +00:00

49 lines
1.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsGZFileWriter_h
#define nsGZFileWriter_h
#include "nsIGZFileWriter.h"
#include "zlib.h"
/**
* A simple class for writing .gz files.
*/
class nsGZFileWriter final : public nsIGZFileWriter {
virtual ~nsGZFileWriter();
public:
enum Operation { Append, Create };
explicit nsGZFileWriter(Operation aMode = Create);
NS_DECL_ISUPPORTS
NS_DECL_NSIGZFILEWRITER
/**
* nsIGZFileWriter exposes two non-virtual overloads of Write(). We
* duplicate them here so that you can call these overloads on a pointer
* to the concrete nsGZFileWriter class.
*/
[[nodiscard]] nsresult
Write(const char* aStr) {
return nsIGZFileWriter::Write(aStr);
}
[[nodiscard]] nsresult Write(const char* aStr, uint32_t aLen) {
return nsIGZFileWriter::Write(aStr, aLen);
}
private:
Operation mMode;
bool mInitialized;
bool mFinished;
gzFile mGZFile;
};
#endif