1 // 2 // Copyright 2019 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_PARSE_H_ 17 #define ABSL_FLAGS_INTERNAL_PARSE_H_ 18 19 #include <string> 20 #include <vector> 21 22 #include "absl/base/config.h" 23 #include "absl/flags/declare.h" 24 #include "absl/strings/string_view.h" 25 26 ABSL_DECLARE_FLAG(std::vector<std::string>, flagfile); 27 ABSL_DECLARE_FLAG(std::vector<std::string>, fromenv); 28 ABSL_DECLARE_FLAG(std::vector<std::string>, tryfromenv); 29 ABSL_DECLARE_FLAG(std::vector<std::string>, undefok); 30 31 namespace absl { 32 ABSL_NAMESPACE_BEGIN 33 namespace flags_internal { 34 35 enum class ArgvListAction { kRemoveParsedArgs, kKeepParsedArgs }; 36 enum class UsageFlagsAction { kHandleUsage, kIgnoreUsage }; 37 enum class OnUndefinedFlag { 38 kIgnoreUndefined, 39 kReportUndefined, 40 kAbortIfUndefined 41 }; 42 43 std::vector<char*> ParseCommandLineImpl(int argc, char* argv[], 44 ArgvListAction arg_list_act, 45 UsageFlagsAction usage_flag_act, 46 OnUndefinedFlag on_undef_flag); 47 48 // -------------------------------------------------------------------- 49 // Inspect original command line 50 51 // Returns true if flag with specified name was either present on the original 52 // command line or specified in flag file present on the original command line. 53 bool WasPresentOnCommandLine(absl::string_view flag_name); 54 55 } // namespace flags_internal 56 ABSL_NAMESPACE_END 57 } // namespace absl 58 59 #endif // ABSL_FLAGS_INTERNAL_PARSE_H_ 60