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hle/result: Implement ResultRange
A ResultRange defines an inclusive range of error descriptions within an error module. This can be used to check whether the description of a given ResultCode falls within the range. The conversion function returns a ResultCode with its description set to description_start.
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@ -153,6 +153,48 @@ constexpr ResultCode ResultSuccess(0);
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*/
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constexpr ResultCode ResultUnknown(UINT32_MAX);
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/**
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* A ResultRange defines an inclusive range of error descriptions within an error module.
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* This can be used to check whether the description of a given ResultCode falls within the range.
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* The conversion function returns a ResultCode with its description set to description_start.
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*
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* An example of how it could be used:
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* \code
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* constexpr ResultRange ResultCommonError{ErrorModule::Common, 0, 9999};
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*
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* ResultCode Example(int value) {
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* const ResultCode result = OtherExample(value);
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*
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* // This will only evaluate to true if result.module is ErrorModule::Common and
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* // result.description is in between 0 and 9999 inclusive.
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* if (ResultCommonError.Includes(result)) {
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* // This returns ResultCode{ErrorModule::Common, 0};
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* return ResultCommonError;
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* }
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*
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* return ResultSuccess;
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* }
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* \endcode
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*/
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class ResultRange {
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public:
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consteval ResultRange(ErrorModule module, u32 description_start, u32 description_end_)
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: code{module, description_start}, description_end{description_end_} {}
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[[nodiscard]] consteval operator ResultCode() const {
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return code;
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}
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[[nodiscard]] constexpr bool Includes(ResultCode other) const {
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return code.module == other.module && code.description <= other.description &&
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other.description <= description_end;
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}
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private:
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ResultCode code;
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u32 description_end;
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};
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/**
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* This is an optional value type. It holds a `ResultCode` and, if that code is ResultSuccess, it
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* also holds a result of type `T`. If the code is an error code (not ResultSuccess), then trying
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