MathExpr.h

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#ifndef included_AMP_MathExpr
#define included_AMP_MathExpr
 
 
#include <initializer_list>
#include <memory>
#include <string>
#include <vector>
 
#include "AMP/utils/tinyexpr/tinyexpr.h"
 
 
namespace AMP {
 
 
class MathExpr
{
public:
    MathExpr();
 
    explicit MathExpr( std::string expression,
                       std::vector<std::string> variables = std::vector<std::string>() );
 
    explicit MathExpr( double value );
 
    MathExpr( const MathExpr & ) = delete;
 
    MathExpr &operator=( const MathExpr & ) = delete;
 
    MathExpr( MathExpr &&rhs );
 
    MathExpr &operator=( MathExpr &&rhs );
 
    ~MathExpr();
 
    MathExpr clone() const;
 
    inline const auto &getExpr() const { return d_expr; }
 
    inline const auto &getVars() const { return d_vars; }
 
    double operator()( const std::initializer_list<double> &data = {} ) const;
 
    double operator()( const double *data ) const;
 
    bool operator==( const MathExpr &rhs ) const;
 
    bool operator!=( const MathExpr &rhs ) const { return !operator==( rhs ); }
 
private:
    void initialize();
 
    std::string d_expr;
    te_expr *d_fun = nullptr;
    std::vector<std::string> d_vars;
    std::vector<te_variable> d_tevar;
    mutable std::vector<double> d_data;
};
 
 
} // namespace AMP
 
#endif