Error.h

#ifndef IMG2NUM_ERROR_H
#define IMG2NUM_ERROR_H
 
#include <stdexcept>
#include <string>
 
namespace img2num {
enum class Error { OK = 0, BAD_ALLOC = 1, INVALID_ARGUMENT = 2, RUNTIME = 3, UNKNOWN = 4 };
 
extern thread_local Error last_error;
extern thread_local std::string last_error_message;
 
inline Error get_last_error() {
    return last_error;
}
inline const std::string get_last_error_message() {
    return last_error_message;
}
void clear_last_error();
 
void set_error(Error code, const std::string message);
 
// Template function for catching and handling exceptions
template <typename Func, typename... Args>
void clear_last_error_and_catch(Func&& exception_prone_func, Args&&... args) {
    clear_last_error();  // Clear any previous error state
    try {
        exception_prone_func(std::forward<Args>(args)...);  // Call the passed function
    } catch (const std::bad_alloc& e) {
        set_error(Error::BAD_ALLOC, e.what());
    } catch (const std::invalid_argument& e) {
        set_error(Error::INVALID_ARGUMENT, e.what());
    } catch (const std::runtime_error& e) {
        set_error(Error::RUNTIME, e.what());
    } catch (const std::exception& e) {
        set_error(Error::UNKNOWN, e.what());
    } catch (...) {
        set_error(Error::UNKNOWN, "Unknown exception occurred");
    }
}
}  // namespace img2num
 
#endif  // IMG2NUM_ERROR_H