constants.h

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#ifndef SYMENGINE_CONSTANTS_H
#define SYMENGINE_CONSTANTS_H
 
#include <symengine/integer.h>
#include <symengine/symbol.h>
#include <symengine/infinity.h>
#include <symengine/nan.h>
 
namespace SymEngine
{
 
class Constant : public Basic
{
private:
    std::string name_;
 
public:
    IMPLEMENT_TYPEID(SYMENGINE_CONSTANT)
    Constant(const std::string &name);
    hash_t __hash__() const override;
    bool __eq__(const Basic &o) const override;
    int compare(const Basic &o) const override;
    inline std::string get_name() const
    {
        return name_;
    }
 
    vec_basic get_args() const override
    {
        return {};
    }
};
 
inline RCP<const Constant> constant(const std::string &name)
{
    return make_rcp<const Constant>(name);
}
 
// Constant Numbers
extern SYMENGINE_EXPORT RCP<const Integer> &zero;
extern SYMENGINE_EXPORT RCP<const Integer> &one;
extern SYMENGINE_EXPORT RCP<const Integer> &minus_one;
extern SYMENGINE_EXPORT RCP<const Integer> &two;
extern SYMENGINE_EXPORT RCP<const Number> &I;
 
// Symbolic Constants
extern SYMENGINE_EXPORT RCP<const Constant> &pi;
extern SYMENGINE_EXPORT RCP<const Constant> &E;
extern SYMENGINE_EXPORT RCP<const Constant> &EulerGamma;
extern SYMENGINE_EXPORT RCP<const Constant> &Catalan;
extern SYMENGINE_EXPORT RCP<const Constant> &GoldenRatio;
 
// Infinity
extern SYMENGINE_EXPORT RCP<const Infty> &Inf;
extern SYMENGINE_EXPORT RCP<const Infty> &NegInf;
extern SYMENGINE_EXPORT RCP<const Infty> &ComplexInf;
 
// Not a Number
extern SYMENGINE_EXPORT RCP<const NaN> &Nan;
} // namespace SymEngine
 
#endif