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// 
// Copyright 2019 The Abseil Authors. 
// 
// 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 
// 
//      https://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 ABSL_FLAGS_INTERNAL_PARSE_H_ 
#define ABSL_FLAGS_INTERNAL_PARSE_H_ 
 
#include <string> 
#include <vector> 
 
#include "absl/base/config.h"
#include "absl/flags/declare.h" 
#include "absl/strings/string_view.h"
 
ABSL_DECLARE_FLAG(std::vector<std::string>, flagfile); 
ABSL_DECLARE_FLAG(std::vector<std::string>, fromenv); 
ABSL_DECLARE_FLAG(std::vector<std::string>, tryfromenv); 
ABSL_DECLARE_FLAG(std::vector<std::string>, undefok); 
 
namespace absl { 
ABSL_NAMESPACE_BEGIN
namespace flags_internal { 
 
enum class ArgvListAction { kRemoveParsedArgs, kKeepParsedArgs }; 
enum class UsageFlagsAction { kHandleUsage, kIgnoreUsage }; 
enum class OnUndefinedFlag { 
  kIgnoreUndefined, 
  kReportUndefined, 
  kAbortIfUndefined 
}; 
 
std::vector<char*> ParseCommandLineImpl(int argc, char* argv[], 
                                        ArgvListAction arg_list_act, 
                                        UsageFlagsAction usage_flag_act, 
                                        OnUndefinedFlag on_undef_flag); 
 
// --------------------------------------------------------------------
// Inspect original command line

// Returns true if flag with specified name was either present on the original
// command line or specified in flag file present on the original command line.
bool WasPresentOnCommandLine(absl::string_view flag_name);

}  // namespace flags_internal 
ABSL_NAMESPACE_END
}  // namespace absl 
 
#endif  // ABSL_FLAGS_INTERNAL_PARSE_H_