class ara::diag::DiagOfferErrorDomain

The parameterless default constructor [SWS_DM_00992] serves to create an instance of class ara::diag::DiagOfferErrorDomain (SWS Diagnostics §8.11.5 “Class: DiagOfferErrorDomain”). It is declared via header file ara/diag/diag_error_domain.h and has the signature constexpr DiagOfferErrorDomain() noexcept; (SWS Diagnostics §8.11.5.2.1.1 “Default Constructor”). The call is synchronous, processes no input parameters, and returns no return value as typical for constructors [SWS_DM_00992].

With regard to concurrency and exception safety, the function is specified as thread-safe as well as exception safe [SWS_DM_00992]. The noexcept specification guarantees that no exceptions are thrown during execution [SWS_DM_00992]. Specific error codes or notifications via DET or DEM are not provided for this constructor.

In the module context, the domain represents error conditions around diagnostic services whose error codes are defined in the enumeration DiagOfferErrc [SWS_DM_00559] and can be referenced via type alias Errc [SWS_DM_00990]. The class provides standard methods such as Name() [SWS_DM_00993], Message() [SWS_DM_00994], and ThrowAsException() [SWS_DM_00995]. In use cases, a direct call to the constructor is likely rarely necessary (interpretation), as function ara::diag::GetDiagOfferDomain() already provides a global reference to the instance [SWS_DM_01003], which is used by ara::diag::MakeErrorCode(), among others [SWS_DM_01005]. Question Q-a98886da9b649096 (open)

The synchronous member function Message of class ara::diag::DiagOfferErrorDomain serves to translate a numerical error code into a descriptive text message [SWS_DM_00994]. Developers include the interface via header file ara/diag/diag_error_domain.h [SWS_DM_00994].

The following requirements apply to usage and call context:

• Parameters and return value: The error value to be queried is passed to the function as ara::core::ErrorDomain::CodeType errorCode. It returns a pointer to a constant character string (const char*), which according to the specification is never nullptr [SWS_DM_00994].
• Error and exception safety: The function is declared as noexcept and specified as exception safe, so that it does not throw any C++ exceptions [SWS_DM_00994]. Unknown or invalid error codes are likely mapped to predefined default messages in order to comply with the null pointer guarantee. Question Q-73eb1822df6a995d (open)
• Concurrency: The operation is declared as a const method and explicitly classified as thread-safe, which allows concurrent calls from multiple threads without external synchronization [SWS_DM_00994].

The method overrides a base interface and follows the standardized error reporting pattern of the diagnostic module, which is used analogously in other error domains such as ara::diag::DiagErrorDomain [SWS_DM_00522], ara::diag::DiagUdsNrcErrorDomain [SWS_DM_00534], ara::diag::DiagReportingErrorDomain [SWS_DM_01001], and ara::diag::DiagSovdErrorDomain [SWS_DM_01814].

The method Name() of class ara::diag::DiagOfferErrorDomain serves to synchronously determine the unique short name of the error domain ([SWS_DM_00993]). It is available via the header file ara/diag/diag_error_domain.h and overrides the base method for domain identification in the Adaptive framework ([SWS_DM_00993]).

Usage and semantics:

• Call context and parameters: The call occurs synchronously, without parameters, and without preconditions directly on the instance of ara::diag::DiagOfferErrorDomain ([SWS_DM_00993]).
• Return value: The function returns a const char* representing the identifier ApApplicationErrorDomain.SN of the error domain ([SWS_DM_00993]). Interpretation: The returned pointer is likely to refer to an immutable, static string that remains valid throughout the entire program runtime. Question Q-86836b3715182080 (open)
• Error handling: The method is declared as noexcept and specified as exception safe ([SWS_DM_00993]). It neither reports error codes nor throws exceptions.
• Concurrency: Execution is classified as thread-safe ([SWS_DM_00993]), so parallel calls from multiple threads are permissible without external synchronization.

Interplay: The behavior corresponds to the general architectural pattern for error domains in Diagnostic Management. Identically specified Name() methods exist for related domains such as ara::diag::DiagErrorDomain ([SWS_DM_00521]), ara::diag::DiagUdsNrcErrorDomain ([SWS_DM_00533]), ara::diag::DiagReportingErrorDomain ([SWS_DM_01000]), and ara::diag::DiagSovdErrorDomain ([SWS_DM_01813]).

According to [SWS_DM_00995], the member function ThrowAsException of the error domain ara::diag::DiagOfferErrorDomain serves to convert a passed error code of type ara::core::ErrorCode into a corresponding C++ exception and throw it (AUTOSAR_AP_SWS_Diagnostics §8.11.5.2.2.3 “ThrowAsException”).

Regarding semantics and interface design, the following properties apply:

• Call and parameters: The method takes a const reference to an instance of ara::core::ErrorCode, has no return value (void), and is declared with noexcept(false) because it throws an exception by definition [SWS_DM_00995].
• Compilation restriction: According to [SWS_CORE_10304], the function does not participate in overload resolution if C++ exceptions are disabled in the compiler toolchain [SWS_DM_00995].
• Safety and concurrency: The function is specified as thread-safe, allowing parallel calls across thread boundaries; however, it is explicitly designated as not exception safe [SWS_DM_00995].
• Interplay: The concept corresponds to the standardized error model for diagnostic error domains, as is also implemented analogously in ara::diag::DiagErrorDomain [SWS_DM_00523], ara::diag::DiagReportingErrorDomain [SWS_DM_01002], ara::diag::DiagUdsNrcErrorDomain [SWS_DM_00535], and ara::diag::DiagSovdErrorDomain [SWS_DM_01815]. The definition is included via the header file #include "ara/diag/diag_error_domain.h" [SWS_DM_00995].

Due to the classification as not exception safe, no additional internal error safeguards are expected to take effect within the method during the throw operation in the system context (interpretation: developers must catch exceptions in the calling application context). Question Q-72152cb488c24026 (open)