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This change refactors util::Status to have a similar shape as the recently open-sourced absl::Status. This will allow Protobuf to eventually use absl::Status and reduce the codesize. Note that there is more work required before absl::Status can be used.
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// Protocol Buffers - Google's data interchange format | ||
// Copyright 2008 Google Inc. All rights reserved. | ||
// https://developers.google.com/protocol-buffers/ | ||
// | ||
// Redistribution and use in source and binary forms, with or without | ||
// modification, are permitted provided that the following conditions are | ||
// met: | ||
// | ||
// * Redistributions of source code must retain the above copyright | ||
// notice, this list of conditions and the following disclaimer. | ||
// * Redistributions in binary form must reproduce the above | ||
// copyright notice, this list of conditions and the following disclaimer | ||
// in the documentation and/or other materials provided with the | ||
// distribution. | ||
// * Neither the name of Google Inc. nor the names of its | ||
// contributors may be used to endorse or promote products derived from | ||
// this software without specific prior written permission. | ||
// | ||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
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#ifndef GOOGLE_PROTOBUF_STUBS_INTERNAL_STATUS_H_ | ||
#define GOOGLE_PROTOBUF_STUBS_INTERNAL_STATUS_H_ | ||
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#include <string> | ||
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#include <google/protobuf/stubs/stringpiece.h> | ||
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#include <google/protobuf/port_def.inc> | ||
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namespace google { | ||
namespace protobuf { | ||
namespace util { | ||
namespace status_internal { | ||
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// These values must match error codes defined in google/rpc/code.proto. | ||
enum class StatusCode : int { | ||
kOk = 0, | ||
kCancelled = 1, | ||
kUnknown = 2, | ||
kInvalidArgument = 3, | ||
kDeadlineExceeded = 4, | ||
kNotFound = 5, | ||
kAlreadyExists = 6, | ||
kPermissionDenied = 7, | ||
kUnauthenticated = 16, | ||
kResourceExhausted = 8, | ||
kFailedPrecondition = 9, | ||
kAborted = 10, | ||
kOutOfRange = 11, | ||
kUnimplemented = 12, | ||
kInternal = 13, | ||
kUnavailable = 14, | ||
kDataLoss = 15, | ||
}; | ||
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class PROTOBUF_EXPORT Status { | ||
public: | ||
// Creates a "successful" status. | ||
Status(); | ||
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// Create a status in the canonical error space with the specified | ||
// code, and error message. If "code == 0", error_message is | ||
// ignored and a Status object identical to Status::kOk is | ||
// constructed. | ||
Status(StatusCode error_code, StringPiece error_message); | ||
Status(const Status&); | ||
Status& operator=(const Status& x); | ||
~Status() {} | ||
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// Some pre-defined Status objects | ||
static const Status OK; // Identical to 0-arg constructor | ||
static const Status CANCELLED; | ||
static const Status UNKNOWN; | ||
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// Accessor | ||
bool ok() const { | ||
return error_code_ == StatusCode::kOk; | ||
} | ||
StatusCode code() const { | ||
return error_code_; | ||
} | ||
StringPiece message() const { | ||
return error_message_; | ||
} | ||
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bool operator==(const Status& x) const; | ||
bool operator!=(const Status& x) const { | ||
return !operator==(x); | ||
} | ||
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// Return a combination of the error code name and message. | ||
std::string ToString() const; | ||
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private: | ||
StatusCode error_code_; | ||
std::string error_message_; | ||
}; | ||
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// Prints a human-readable representation of 'x' to 'os'. | ||
PROTOBUF_EXPORT std::ostream& operator<<(std::ostream& os, const Status& x); | ||
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} // namespace status_internal | ||
} // namespace util | ||
} // namespace protobuf | ||
} // namespace google | ||
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#include <google/protobuf/port_undef.inc> | ||
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#endif // GOOGLE_PROTOBUF_STUBS_INTERNAL_STATUS_H_ |
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