private_handle_accessor.h (2334B)
1 // 2 // Copyright 2020 The Abseil Authors. 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 // https://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 #ifndef ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_ 17 #define ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_ 18 19 #include <memory> 20 #include <string> 21 22 #include "absl/base/config.h" 23 #include "absl/flags/commandlineflag.h" 24 #include "absl/flags/internal/commandlineflag.h" 25 #include "absl/strings/string_view.h" 26 27 namespace absl { 28 ABSL_NAMESPACE_BEGIN 29 namespace flags_internal { 30 31 // This class serves as a trampoline to access private methods of 32 // CommandLineFlag. This class is intended for use exclusively internally inside 33 // of the Abseil Flags implementation. 34 class PrivateHandleAccessor { 35 public: 36 // Access to CommandLineFlag::TypeId. 37 static FlagFastTypeId TypeId(const CommandLineFlag& flag); 38 39 // Access to CommandLineFlag::SaveState. 40 static std::unique_ptr<FlagStateInterface> SaveState(CommandLineFlag& flag); 41 42 // Access to CommandLineFlag::IsSpecifiedOnCommandLine. 43 static bool IsSpecifiedOnCommandLine(const CommandLineFlag& flag); 44 45 // Access to CommandLineFlag::ValidateInputValue. 46 static bool ValidateInputValue(const CommandLineFlag& flag, 47 absl::string_view value); 48 49 // Access to CommandLineFlag::CheckDefaultValueParsingRoundtrip. 50 static void CheckDefaultValueParsingRoundtrip(const CommandLineFlag& flag); 51 52 static bool ParseFrom(CommandLineFlag& flag, absl::string_view value, 53 flags_internal::FlagSettingMode set_mode, 54 flags_internal::ValueSource source, std::string& error); 55 56 // Access to CommandLineFlag::TypeName. 57 static absl::string_view TypeName(const CommandLineFlag& flag); 58 }; 59 60 } // namespace flags_internal 61 ABSL_NAMESPACE_END 62 } // namespace absl 63 64 #endif // ABSL_FLAGS_INTERNAL_PRIVATE_HANDLE_ACCESSOR_H_