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// Copyright 2016 Google Inc.
//
// 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.!
#ifndef ABSL_FLAGS_FLAG_H_
#define ABSL_FLAGS_FLAG_H_
#include <functional>
#include <memory>
#include <string>
#include <vector>
namespace absl {
namespace internal {
struct FlagFunc;
void RegisterFlag(const std::string &name, std::shared_ptr<FlagFunc> func);
} // namespace internal
template <typename T>
class Flag {
public:
Flag(const char *name, const char *type, const char *help,
const T &defautl_value);
virtual ~Flag();
const T &value() const;
void set_value(const T &value);
void set_value_as_str(const std::string &value_as_str);
private:
T value_;
std::shared_ptr<internal::FlagFunc> func_;
};
template <typename T>
const T &GetFlag(const Flag<T> &flag) {
return flag.value();
}
template <typename T, typename V>
void SetFlag(Flag<T> *flag, const V &v) {
const T value(v);
flag->set_value(value);
}
#define HAS_ABSL_CLEANUP_FLAGS
void CleanupFlags();
} // namespace absl
#define ABSL_FLAG(Type, name, defautl_value, help) \
absl::Flag<Type> FLAGS_##name(#name, #Type, help, defautl_value);
#define ABSL_DECLARE_FLAG(Type, name) extern absl::Flag<Type> FLAGS_##name;
#endif // ABSL_FLAGS_FLAG_H_
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