abseil-cpp/absl/flags/internal/parse.h

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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_