// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed 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
// Generated File
// DO NOT EDIT
#include "query/Plan.h"
#include <utility>
#include "ExprVisitor.h"

namespace milvus::query {
class ShowExprVisitor : public ExprVisitor {
 public:
    void
    visit(LogicalUnaryExpr& expr) override;

    void
    visit(LogicalBinaryExpr& expr) override;

    void
    visit(TermExpr& expr) override;

    void
    visit(UnaryRangeExpr& expr) override;

    void
    visit(BinaryRangeExpr& expr) override;

    void
    visit(CompareExpr& expr) override;

 public:
    using RetType = Json;

 public:
    RetType
    call_child(Expr& expr) {
        assert(!ret_.has_value());
        expr.accept(*this);
        assert(ret_.has_value());
        auto ret = std::move(ret_);
        ret_ = std::nullopt;
        return std::move(ret.value());
    }

    Json
    combine(Json&& extra, UnaryExprBase& expr) {
        auto result = std::move(extra);
        result["child"] = call_child(*expr.child_);
        return result;
    }

    Json
    combine(Json&& extra, BinaryExprBase& expr) {
        auto result = std::move(extra);
        result["left_child"] = call_child(*expr.left_);
        result["right_child"] = call_child(*expr.right_);
        return result;
    }

 private:
    std::optional<RetType> ret_;
};
}  // namespace milvus::query
