NumericConstant.h

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/*
 * Souffle - A Datalog Compiler
 * Copyright (c) 2013, 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 NumericConstant.h
 *
 * Defines the numeric constant class
 *
 ***********************************************************************/
 
#pragma once
 
#include "ast/Constant.h"
#include "ast/Node.h"
#include "parser/SrcLocation.h"
#include "souffle/RamTypes.h"
#include <cassert>
#include <optional>
#include <string>
#include <utility>
 
namespace souffle::ast {
 
/**
 * Numeric Constant
 *
 * The constant can be initialized with type.
 * If this is the case, the typesystem will be forced to use it.
 * Otherwise the type is inferred from context.
 */
class NumericConstant : public Constant {
public:
    enum class Type { Int, Uint, Float };
 
    NumericConstant(RamSigned value) : Constant(std::to_string(value)), fixedType(Type::Int) {}
 
    NumericConstant(std::string constant, SrcLocation loc) : Constant(std::move(constant)) {
        setSrcLoc(std::move(loc));
    }
 
    NumericConstant(std::string constant, std::optional<Type> fixedType = std::nullopt, SrcLocation loc = {})
            : Constant(std::move(constant)), fixedType(fixedType) {
        setSrcLoc(std::move(loc));
    }
 
    NumericConstant* clone() const override {
        auto* copy = new NumericConstant(getConstant(), getFixedType());
        copy->setSrcLoc(getSrcLoc());
        if (finalTranslatorType.has_value()) {
            copy->setFinalType(finalTranslatorType.value());
        }
        return copy;
    }
 
    const std::optional<Type>& getFixedType() const {
        return fixedType;
    }
 
    void setFinalType(Type newType) {
        finalTranslatorType = newType;
    }
 
    std::optional<Type> getFinalType() const {
        return finalTranslatorType;
    }
 
protected:
    bool equal(const Node& node) const override {
        const auto& other = static_cast<const NumericConstant&>(node);
        return Constant::equal(node) && fixedType == other.fixedType;
    }
 
private:
    std::optional<Type> fixedType;
 
    // TODO (azreika): remove after refactoring translator
    std::optional<Type> finalTranslatorType;
};
 
}  // namespace souffle::ast