1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #pragma once 17 18 class Result { 19 public: success()20 static Result success() { 21 return Result(true); 22 } 23 // Construct a result indicating an error. NOTE: the data in |message| will 24 // NOT be copied. It must be kept alive for as long as its intended to be 25 // used. This way the object is kept light-weight. error(const char * message)26 static Result error(const char* message) { 27 return Result(message); 28 } 29 isSuccess()30 bool isSuccess() const { return mSuccess; } 31 bool operator!() const { return !mSuccess; } 32 c_str()33 const char* c_str() const { return mMessage; } 34 private: Result(bool success)35 explicit Result(bool success) : mSuccess(success) { } Result(const char * message)36 explicit Result(const char* message) 37 : mMessage(message), mSuccess(false) { 38 } 39 const char* mMessage; 40 bool mSuccess; 41 }; 42 43