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35 lines
598 B
C++
35 lines
598 B
C++
#pragma once
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#include "ValueSourceVisitor.h"
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#include <Common/Exception.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NOT_IMPLEMENTED;
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}
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namespace GatherUtils
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{
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struct IValueSource
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{
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virtual ~IValueSource() = default;
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virtual void accept(ValueSourceVisitor &)
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{
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throw Exception("Accept not implemented for " + demangle(typeid(*this).name()), ErrorCodes::NOT_IMPLEMENTED);
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}
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virtual bool isConst() const { return false; }
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};
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template <typename Derived>
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class ValueSourceImpl : public Visitable<Derived, IValueSource, ValueSourceVisitor> {};
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}
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}
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