exception.h

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#ifndef SPIKE_EXCEPTION_H
#define SPIKE_EXCEPTION_H

#include <stdexcept>
#include <string>

namespace spike {

class system_error : public std::runtime_error
{
public:
    enum Reason
    {
        Zero_pivoting        = -1,
        Negative_MC64_weight = -2,
        Illegal_update       = -3,
        Illegal_solve        = -4,
        Matrix_singular      = -5
    };

    system_error(Reason             reason,
                 const std::string& what_arg)
    : std::runtime_error(what_arg),
      m_reason(reason)
    {}

    system_error(Reason      reason,
                 const char* what_arg)
    : std::runtime_error(what_arg),
      m_reason(reason)
    {}
    
    virtual ~system_error() throw() {}

    Reason  reason() const {return m_reason;}

private:
    Reason        m_reason;
};

} // namespace spike


#endif