teca_bad_cast.h

#ifndef teca_bad_cast_h
#define teca_bad_cast_h
 
#include "teca_config.h"
 
#include <exception>
#include <string>
#include <typeinfo>
 
/** @brief
 * An exception that maybe thrown when a conversion between two data types
 * fails.
 */
class TECA_EXPORT teca_bad_cast : public std::exception
{
public:
    teca_bad_cast() = delete;
    ~teca_bad_cast() = default;
 
    teca_bad_cast(const std::string &from, const std::string &to);
 
    const char* what() const noexcept { return m_what.c_str(); }
 
private:
    std::string m_what;
};
 
/** returns the class name of the teca_algorithm or the string "nullptr"
 * if the algorithm is a nullptr.
 */
template <typename class_t>
TECA_EXPORT
std::string safe_class_name(const class_t &o)
{
    return o ? std::string(o->get_class_name()) : std::string("nullptr");
}
 
template <typename ptr_t>
TECA_EXPORT
std::string safe_pointer_name(const ptr_t *o)
{
    return std::string("pointer of type ") +
        (o ? std::string(typeid(o).name()) : std::string("nullptr"));
}
 
#endif