56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
// Copyright 2018 The Amber Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef AMBER_RESULT_H_
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#define AMBER_RESULT_H_
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#include <string>
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#include <vector>
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namespace amber {
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/// Holds the results for an operation.
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class Result {
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public:
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/// Creates a result which succeeded.
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Result() = default;
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/// Creates a result which failed and will return |err|.
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explicit Result(const std::string& err);
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inline Result(const Result&) = default;
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inline Result(Result&&) = default;
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inline Result& operator=(const Result&) = default;
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inline Result& operator=(Result&&) = default;
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/// Adds the errors from |res| to this Result.
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Result& operator+=(const Result& res);
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/// Adds the error |err| to this Result.
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Result& operator+=(const std::string& err);
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/// Returns true if the result is a success.
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bool IsSuccess() const { return errors_.size() == 0; }
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/// Returns the error string if |IsSuccess| is false.
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std::string Error() const;
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private:
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std::vector<std::string> errors_;
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};
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} // namespace amber
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#endif // AMBER_RESULT_H_
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