/************************************************************************* * * Copyright 2020 Realm Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * **************************************************************************/ #ifndef REALM_BSON_REGULAR_EXPRESSION_HPP #define REALM_BSON_REGULAR_EXPRESSION_HPP #include <ostream> #include <string> #include <unordered_set> namespace realm { namespace bson { /// Provides regular expression capabilities for pattern matching strings in queries. /// MongoDB uses Perl compatible regular expressions (i.e. "PCRE") version 8.42 with UTF-8 support. struct RegularExpression { enum class Option { None, IgnoreCase = 1, Multiline = 2, Dotall = 4, Extended = 8 }; RegularExpression() : m_pattern("") , m_options(Option::None) { } RegularExpression(const std::string pattern, const std::string& options); RegularExpression(const std::string pattern, Option options); RegularExpression(const RegularExpression&) = default; RegularExpression(RegularExpression&&) = default; RegularExpression& operator=(const RegularExpression& regex) = default; const std::string pattern() const; Option options() const; private: static constexpr Option option_char_to_option(const char option); friend std::ostream& operator<<(std::ostream& out, const Option& o); std::string m_pattern; Option m_options; }; inline bool operator==(const RegularExpression& lhs, const RegularExpression& rhs) noexcept { return lhs.pattern() == rhs.pattern() && lhs.options() == rhs.options(); } inline bool operator!=(const RegularExpression& lhs, const RegularExpression& rhs) noexcept { return !(lhs.pattern() == rhs.pattern() && lhs.options() == rhs.options()); } inline RegularExpression::Option operator|(const RegularExpression::Option& lhs, const RegularExpression::Option& rhs) noexcept { return RegularExpression::Option(static_cast<int>(lhs) | static_cast<int>(rhs)); } inline RegularExpression::Option operator&(const RegularExpression::Option& lhs, const RegularExpression::Option& rhs) noexcept { return RegularExpression::Option(static_cast<int>(lhs) & static_cast<int>(rhs)); } std::ostream& operator<<(std::ostream& out, const RegularExpression::Option& option); } // namespace bson } // namespace realm #endif /* REALM_BSON_REGULAR_EXPRESSION_HPP */