Constant.h

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/*
 * Souffle - A Datalog Compiler
 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved
 * Licensed under the Universal Permissive License v 1.0 as shown at:
 * - https://opensource.org/licenses/UPL
 * - <souffle root>/licenses/SOUFFLE-UPL.txt
 */
 
/************************************************************************
 *
 * @file Constant.h
 *
 * Defines a class for evaluating values in the Relational Algebra Machine
 *
 ************************************************************************/
 
#pragma once
 
#include "ram/Expression.h"
#include "ram/Node.h"
#include "souffle/RamTypes.h"
 
namespace souffle::ram {
 
/**
 * @class Constant
 * @brief Represents a Ram Constant
 *
 */
class Constant : public Expression {
public:
    /** @brief Get constant */
    RamDomain getConstant() const {
        return constant;
    }
 
protected:
    explicit Constant(RamDomain constant) : constant(constant) {}
 
    bool equal(const Node& node) const override {
        const auto& other = static_cast<const Constant&>(node);
        return constant == other.constant;
    }
 
    /** Constant value */
    const RamDomain constant;
};
 
}  // namespace souffle::ram