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#pragma once
#include <Common/Visitor.h>
#include <base/TypeLists.h>
namespace DB::GatherUtils
{
template <typename T>
struct NumericValueSource;
struct GenericValueSource;
template <typename ArraySource>
struct NullableValueSource;
template <typename Base>
struct ConstSource;
using NumericValueSources = TypeListMap<NumericValueSource, TypeListNumberWithUUID>;
using BasicValueSources = TypeListAppend<GenericValueSource, NumericValueSources>;
using NullableValueSources = TypeListMap<NullableValueSource, BasicValueSources>;
using BasicAndNullableValueSources = TypeListConcat<BasicValueSources, NullableValueSources>;
using ConstValueSources = TypeListMap<ConstSource, BasicAndNullableValueSources>;
using TypeListValueSources = TypeListConcat<BasicAndNullableValueSources, ConstValueSources>;
class ValueSourceVisitor : public TypeListChangeRoot<Visitor, TypeListValueSources>
{
protected:
~ValueSourceVisitor() = default;
};
template <typename Derived>
class ValueSourceVisitorImpl : public VisitorImpl<Derived, ValueSourceVisitor>
{
protected:
~ValueSourceVisitorImpl() = default;
};
}
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