ExprtkExpressionEvaluator.h

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#pragma once
 
#include <memory>
#include <unordered_map>
#include <vector>
 
#include "storm/storage/expressions/ExpressionEvaluatorBase.h"
 
#include "storm/storage/expressions/ToExprtkStringVisitor.h"
 
#include "storm/storage/expressions/ExprtkCompiledExpression.h"
 
namespace storm {
namespace expressions {
 
template<typename RationalType>
class ExprtkExpressionEvaluatorBase : public ExpressionEvaluatorBase<RationalType> {
   public:
    ExprtkExpressionEvaluatorBase(storm::expressions::ExpressionManager const& manager);
 
    bool asBool(Expression const& expression) const override;
    int_fast64_t asInt(Expression const& expression) const override;
 
    void setBooleanValue(storm::expressions::Variable const& variable, bool value) override;
    void setIntegerValue(storm::expressions::Variable const& variable, int_fast64_t value) override;
    void setRationalValue(storm::expressions::Variable const& variable, double value) override;
 
   protected:
    typedef double ValueType;
    typedef ExprtkCompiledExpression::CompiledExpressionType CompiledExpressionType;

    CompiledExpressionType const& getCompiledExpression(storm::expressions::Expression const& expression) const;
 
    // The parser used.
    mutable std::unique_ptr<exprtk::parser<ValueType>> parser;
 
    // The symbol table used.
    mutable std::unique_ptr<exprtk::symbol_table<ValueType>> symbolTable;
 
    // The actual data that is fed into the expression.
    std::vector<ValueType> booleanValues;
    std::vector<ValueType> integerValues;
    std::vector<ValueType> rationalValues;
};
 
class ExprtkExpressionEvaluator : public ExprtkExpressionEvaluatorBase<double> {
   public:
    ExprtkExpressionEvaluator(storm::expressions::ExpressionManager const& manager);
 
    double asRational(Expression const& expression) const override;
};
}  // namespace expressions
}  // namespace storm