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Diffstat (limited to 'NorthstarDedicatedTest/include/protobuf/stubs/status_macros.h')
-rw-r--r-- | NorthstarDedicatedTest/include/protobuf/stubs/status_macros.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/NorthstarDedicatedTest/include/protobuf/stubs/status_macros.h b/NorthstarDedicatedTest/include/protobuf/stubs/status_macros.h new file mode 100644 index 00000000..befebc6f --- /dev/null +++ b/NorthstarDedicatedTest/include/protobuf/stubs/status_macros.h @@ -0,0 +1,89 @@ +// 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. + +// From: util/task/contrib/status_macros/status_macros.h + +#ifndef GOOGLE_PROTOBUF_STUBS_STATUS_MACROS_H_ +#define GOOGLE_PROTOBUF_STUBS_STATUS_MACROS_H_ + +#include <stubs/common.h> +#include <stubs/status.h> +#include <stubs/statusor.h> + +namespace google { +namespace protobuf { +namespace util { + +// Run a command that returns a util::Status. If the called code returns an +// error status, return that status up out of this method too. +// +// Example: +// RETURN_IF_ERROR(DoThings(4)); +#define RETURN_IF_ERROR(expr) \ + do { \ + /* Using _status below to avoid capture problems if expr is "status". */ \ + const PROTOBUF_NAMESPACE_ID::util::Status _status = (expr); \ + if (PROTOBUF_PREDICT_FALSE(!_status.ok())) return _status; \ + } while (0) + +// Internal helper for concatenating macro values. +#define STATUS_MACROS_CONCAT_NAME_INNER(x, y) x##y +#define STATUS_MACROS_CONCAT_NAME(x, y) STATUS_MACROS_CONCAT_NAME_INNER(x, y) + +template<typename T> +Status DoAssignOrReturn(T& lhs, StatusOr<T> result) { + if (result.ok()) { + lhs = result.value(); + } + return result.status(); +} + +#define ASSIGN_OR_RETURN_IMPL(status, lhs, rexpr) \ + Status status = DoAssignOrReturn(lhs, (rexpr)); \ + if (PROTOBUF_PREDICT_FALSE(!status.ok())) return status; + +// Executes an expression that returns a util::StatusOr, extracting its value +// into the variable defined by lhs (or returning on error). +// +// Example: Assigning to an existing value +// ValueType value; +// ASSIGN_OR_RETURN(value, MaybeGetValue(arg)); +// +// WARNING: ASSIGN_OR_RETURN expands into multiple statements; it cannot be used +// in a single statement (e.g. as the body of an if statement without {})! +#define ASSIGN_OR_RETURN(lhs, rexpr) \ + ASSIGN_OR_RETURN_IMPL( \ + STATUS_MACROS_CONCAT_NAME(_status_or_value, __COUNTER__), lhs, rexpr); + +} // namespace util +} // namespace protobuf +} // namespace google + +#endif // GOOGLE_PROTOBUF_STUBS_STATUS_H_ |