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32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
#pragma once
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#include <Common/Visitor.h>
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#include <Core/TypeListNumber.h>
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namespace DB::GatherUtils
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{
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template <typename T>
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struct NumericArraySource;
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struct GenericArraySource;
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template <typename ArraySource>
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struct NullableArraySource;
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template <typename Base>
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struct ConstSource;
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using NumericArraySources = typename TypeListMap<NumericArraySource, TypeListNumbers>::Type;
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using BasicArraySources = typename AppendToTypeList<GenericArraySource, NumericArraySources>::Type;
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using NullableArraySources = typename TypeListMap<NullableArraySource, BasicArraySources>::Type;
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using BasicAndNullableArraySources = typename TypeListConcat<BasicArraySources, NullableArraySources>::Type;
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using ConstArraySources = typename TypeListMap<ConstSource, BasicAndNullableArraySources>::Type;
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using TypeListArraySources = typename TypeListConcat<BasicAndNullableArraySources, ConstArraySources>::Type;
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class ArraySourceVisitor : public ApplyTypeListForClass<Visitor, TypeListArraySources>::Type {};
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template <typename Derived>
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class ArraySourceVisitorImpl : public VisitorImpl<Derived, ArraySourceVisitor> {};
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}
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