TranscendentalNumberLiteralExpression.h

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#pragma once
 
#include "storm/storage/expressions/BaseExpression.h"
#include "storm/storage/expressions/RationalLiteralExpression.h"
 
namespace storm {
namespace expressions {
class TranscendentalNumberLiteralExpression : public BaseExpression {
   public:
    enum class TranscendentalNumber {
        PI,  // π
        E    // EulerNumber
    };

    TranscendentalNumberLiteralExpression(ExpressionManager const& manager, TranscendentalNumber const& value);
 
    // Instantiate constructors and assignments with their default implementations.
    TranscendentalNumberLiteralExpression(TranscendentalNumberLiteralExpression const& other) = default;
    TranscendentalNumberLiteralExpression& operator=(TranscendentalNumberLiteralExpression const& other) = delete;
    TranscendentalNumberLiteralExpression(TranscendentalNumberLiteralExpression&&) = default;
    TranscendentalNumberLiteralExpression& operator=(TranscendentalNumberLiteralExpression&&) = delete;
    virtual ~TranscendentalNumberLiteralExpression() = default;
 
    // Override base class methods.
    virtual double evaluateAsDouble(Valuation const* valuation = nullptr) const override;
    virtual bool isLiteral() const override;
    virtual void gatherVariables(std::set<storm::expressions::Variable>& variables) const override;
    virtual std::shared_ptr<BaseExpression const> simplify() const override;
    virtual boost::any accept(ExpressionVisitor& visitor, boost::any const& data) const override;

    TranscendentalNumber const& getTranscendentalNumber() const;

    std::string asString() const;
 
   protected:
    // Override base class method.
    virtual void printToStream(std::ostream& stream) const override;
 
   private:
    // The operand of the unary expression.
    const TranscendentalNumber value;
};
}  // namespace expressions
}  // namespace storm