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#pragma clang system_header
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 <string_view>
#include <tuple>
#include <utility>
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/type_traits.h"
namespace arrow20 {
namespace internal {
template <typename...>
struct all_same : std::true_type {};
template <typename One>
struct all_same<One> : std::true_type {};
template <typename Same, typename... Rest>
struct all_same<Same, Same, Rest...> : all_same<Same, Rest...> {};
template <typename One, typename Other, typename... Rest>
struct all_same<One, Other, Rest...> : std::false_type {};
template <size_t... I, typename... T, typename Fn>
void ForEachTupleMemberImpl(const std::tuple<T...>& tup, Fn&& fn,
std::index_sequence<I...>) {
(..., fn(std::get<I>(tup), I));
}
template <typename... T, typename Fn>
void ForEachTupleMember(const std::tuple<T...>& tup, Fn&& fn) {
ForEachTupleMemberImpl(tup, fn, std::index_sequence_for<T...>());
}
template <typename C, typename T>
struct DataMemberProperty {
using Class = C;
using Type = T;
constexpr const Type& get(const Class& obj) const { return obj.*ptr_; }
void set(Class* obj, Type value) const { (*obj).*ptr_ = std::move(value); }
constexpr std::string_view name() const { return name_; }
std::string_view name_;
Type Class::*ptr_;
};
template <typename Class, typename Type>
constexpr DataMemberProperty<Class, Type> DataMember(std::string_view name,
Type Class::*ptr) {
return {name, ptr};
}
template <typename C, typename T>
struct CoercedDataMemberProperty {
using Class = C;
using Type = T;
constexpr Type get(const Class& obj) const { return (obj.*get_coerced_)(); }
void set(Class* obj, Type value) const { (*obj).*ptr_for_set_ = std::move(value); }
constexpr std::string_view name() const { return name_; }
std::string_view name_;
Type Class::*ptr_for_set_;
Type (Class::*get_coerced_)() const;
};
template <typename Class, typename Type>
constexpr CoercedDataMemberProperty<Class, Type> CoercedDataMember(std::string_view name,
Type Class::*ptr,
Type (Class::*get)()
const) {
return {name, ptr, get};
}
template <typename... Properties>
struct PropertyTuple {
template <typename Fn>
void ForEach(Fn&& fn) const {
ForEachTupleMember(props_, fn);
}
static_assert(all_same<typename Properties::Class...>::value,
"All properties must be properties of the same class");
size_t size() const { return sizeof...(Properties); }
std::tuple<Properties...> props_;
};
template <typename... Properties>
PropertyTuple<Properties...> MakeProperties(Properties... props) {
return {std::make_tuple(props...)};
}
template <typename Enum>
struct EnumTraits {};
template <typename Enum, Enum... Values>
struct BasicEnumTraits {
using CType = typename std::underlying_type<Enum>::type;
using Type = typename CTypeTraits<CType>::ArrowType;
static std::array<Enum, sizeof...(Values)> values() { return {Values...}; }
};
template <typename T, typename Enable = void>
struct has_enum_traits : std::false_type {};
template <typename T>
struct has_enum_traits<T, void_t<typename EnumTraits<T>::Type>> : std::true_type {};
} // namespace internal
} // namespace arrow20
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