1 /** 2 * Copyright (c) 2021-2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PANDA_VERIFIER_ABSTRACT_VALUE_HPP 17 #define PANDA_VERIFIER_ABSTRACT_VALUE_HPP 18 19 #include "verification/value/variables.h" 20 21 #include "macros.h" 22 23 #include <variant> 24 25 namespace ark::verifier { 26 class AbstractValue { 27 public: 28 struct None {}; 29 using ContentsData = std::variant<None, Variables::Var>; 30 AbstractValue() = default; 31 AbstractValue(const AbstractValue &) = default; 32 AbstractValue(AbstractValue &&) = default; 33 AbstractValue &operator=(const AbstractValue &) = default; 34 AbstractValue &operator=(AbstractValue &&) = default; 35 ~AbstractValue() = default; 36 // NOLINTNEXTLINE(google-explicit-constructor) AbstractValue(const Variables::Var & var)37 AbstractValue(const Variables::Var &var) : contents_ {var} {} GetVar()38 Variables::Var GetVar() const 39 { 40 ASSERT(IsVar()); 41 return std::get<Variables::Var>(contents_); 42 } 43 AbstractValue &operator=(const None & /* unused */) 44 { 45 contents_ = None {}; 46 return *this; 47 } 48 AbstractValue &operator=(Variables::Var const &var) 49 { 50 contents_ = var; 51 return *this; 52 } IsNone()53 bool IsNone() const 54 { 55 return std::holds_alternative<None>(contents_); 56 } IsVar()57 bool IsVar() const 58 { 59 return std::holds_alternative<Variables::Var>(contents_); 60 } Clear()61 void Clear() 62 { 63 contents_ = None {}; 64 } 65 AbstractValue operator&([[maybe_unused]] const AbstractValue &rhs) const 66 { 67 // currently only None is supported 68 // ASSERT(IsNone() && rhs.IsNone()) 69 return {}; 70 } 71 72 private: 73 ContentsData contents_ {None {}}; 74 }; 75 } // namespace ark::verifier 76 77 #endif // !PANDA_VERIFIER_ABSTRACT_VALUE_HPP 78