from_gflags.h

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/*
 * Copyright (C) 2025 The Android Open Source Project
 *
 * 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
 *
 *      http://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.
 */
 
#pragma once
 
#include <string>
#include <vector>
 
#include "gflags/gflags.h"
 
#include "cuttlefish/result/result.h"
 
namespace cuttlefish {
 
template <typename T>
struct FromGflags {
  std::vector<T> values;
  bool is_default;
};
 
extern template struct FromGflags<bool>;
extern template struct FromGflags<int>;
extern template struct FromGflags<std::string>;
 
Result<FromGflags<bool>> BoolFromGlobalGflags(
    const gflags::CommandLineFlagInfo& flag_info, const std::string& flag_name);
Result<FromGflags<bool>> BoolFromGlobalGflags(
    const gflags::CommandLineFlagInfo& flag_info, const std::string& flag_name,
    bool default_value);
Result<FromGflags<int>> IntFromGlobalGflags(
    const gflags::CommandLineFlagInfo& flag_info, const std::string& flag_name);
Result<FromGflags<std::string>> StringFromGlobalGflags(
    const gflags::CommandLineFlagInfo& flag_info, const std::string& flag_name);
 
}  // namespace cuttlefish