error.hpp

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#ifndef JOIN_CORE_ERROR_HPP
#define JOIN_CORE_ERROR_HPP
 
// C++.
#include <system_error>
 
namespace join
{
    extern thread_local std::error_code lastError;
 
    enum class Errc
    {
        InUse = 1,         
        InvalidParam,      
        ConnectionRefused, 
        ConnectionClosed,  
        TimedOut,          
        PermissionDenied,  
        OutOfMemory,       
        OperationFailed,   
        NotFound,          
        MessageUnknown,    
        MessageTooLong,    
        TemporaryError,    
        UnknownError       
    };
 
    class ErrorCategory : public std::error_category
    {
    public:
        constexpr ErrorCategory () noexcept = default;
 
        ErrorCategory (const ErrorCategory&) = delete;
 
        ErrorCategory& operator= (const ErrorCategory&) = delete;
 
        virtual ~ErrorCategory () = default;
 
        virtual const char* name () const noexcept override;
 
        virtual std::string message (int code) const noexcept override;
 
        virtual std::error_condition default_error_condition (int code) const noexcept override;
 
        virtual bool equivalent (const std::error_code& code, int condition) const noexcept override;
 
        virtual bool equivalent (int code, const std::error_condition& condition) const noexcept override;
    };
 
    const std::error_category& getErrorCategory () noexcept;
 
    std::error_code make_error_code (join::Errc code) noexcept;
 
    std::error_condition make_error_condition (join::Errc code) noexcept;
}
 
namespace std
{
    template <>
    struct is_error_condition_enum<join::Errc> : public true_type
    {
    };
}
 
#endif