THUAI6/CAPI/cpp/grpc/include/absl/flags/internal/parse.h

//
// 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_