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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "customtypetermvisitor.h"
namespace search::query {
/**
* Use this class to visit all term nodes by deriving from this class
* and implementing a single template member function:
* template <class TermType> void visitTerm(TermType &n);
*
* This class uses the curiously recurring template pattern to know
* its own derived class that has the visitTerm template member
* function.
*/
template <class Self, class NodeTypes>
class TemplateTermVisitor : public CustomTypeTermVisitor<NodeTypes> {
template <class TermNode>
void myVisit(TermNode &n) {
static_cast<Self &>(*this).template visitTerm(n);
}
void visit(typename NodeTypes::NumberTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::LocationTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::PrefixTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::RangeTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::StringTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::SubstringTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::SuffixTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::PredicateQuery &n) override { myVisit(n); }
void visit(typename NodeTypes::RegExpTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::NearestNeighborTerm &n) override { myVisit(n); }
void visit(typename NodeTypes::FuzzyTerm &n) override { myVisit(n); }
// Phrases are terms with children. This visitor will not visit
// the phrase's children, unless this member function is
// overridden to do so.
void visit(typename NodeTypes::Phrase &n) override { myVisit(n); }
// WeightedSetTerms are terms with children. This visitor will not visit
// the weighted set's children, unless this member function is
// overridden to do so.
void visit(typename NodeTypes::WeightedSetTerm &n) override { myVisit(n); }
// DotProducts have children. This visitor will not visit the dot
// product's children, unless this member function is overridden
// to do so.
void visit(typename NodeTypes::DotProduct &n) override { myVisit(n); }
// WandTerms have children. This visitor will not visit the wand
// term's children, unless this member function is overridden
// to do so.
void visit(typename NodeTypes::WandTerm &n) override { myVisit(n); }
// SameElement have children. This visitor will not visit the
// term's children, unless this member function is overridden
// to do so.
void visit(typename NodeTypes::SameElement &n) override { myVisit(n); }
};
}
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