30 lines
819 B
C
30 lines
819 B
C
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// Copyright 2021 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_FILES_FILE_ERROR_OR_H_
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#define BASE_FILES_FILE_ERROR_OR_H_
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#include "base/files/file.h"
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#include "base/types/expected.h"
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namespace base {
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// Helper for methods which perform file system operations and which may fail.
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// Objects of this type can take on EITHER a base::File::Error value OR a result
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// value of the specified type. For example:
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//
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// base::FileErrorOr<int64_t> GetSize() {
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// if (failed_to_get_size)
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// return base::unexpected(base::File::Error::FILE_ERROR_FAILED);
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//
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// return size;
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// }
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//
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template <class ValueType>
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using FileErrorOr = expected<ValueType, File::Error>;
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} // namespace base
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#endif // BASE_FILES_FILE_ERROR_OR_H_
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