diff options
| -rw-r--r-- | src/core/hle/result.h | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/src/core/hle/result.h b/src/core/hle/result.h index 29fa4eed2..a1917d32b 100644 --- a/src/core/hle/result.h +++ b/src/core/hle/result.h @@ -154,34 +154,32 @@ constexpr ResultCode ResultSuccess(0); constexpr ResultCode ResultUnknown(UINT32_MAX); /** - * This is an optional value type. It holds a `ResultCode` and, if that code is a success code, - * also holds a result of type `T`. If the code is an error code then trying to access the inner - * value fails, thus ensuring that the ResultCode of functions is always checked properly before - * their return value is used. It is similar in concept to the `std::optional` type - * (http://en.cppreference.com/w/cpp/experimental/optional) originally proposed for inclusion in - * C++14, or the `Result` type in Rust (http://doc.rust-lang.org/std/result/index.html). + * This is an optional value type. It holds a `ResultCode` and, if that code is ResultSuccess, it + * also holds a result of type `T`. If the code is an error code (not ResultSuccess), then trying + * to access the inner value with operator* is undefined behavior and will assert with Unwrap(). + * Users of this class must be cognizant to check the status of the ResultVal with operator bool(), + * Code(), Succeeded() or Failed() prior to accessing the inner value. * * An example of how it could be used: * \code * ResultVal<int> Frobnicate(float strength) { * if (strength < 0.f || strength > 1.0f) { * // Can't frobnicate too weakly or too strongly - * return ResultCode(ErrorDescription::OutOfRange, ErrorModule::Common, - * ErrorSummary::InvalidArgument, ErrorLevel::Permanent); + * return ResultCode{ErrorModule::Common, 1}; * } else { * // Frobnicated! Give caller a cookie - * return MakeResult<int>(42); + * return MakeResult(42); * } * } * \endcode * * \code - * ResultVal<int> frob_result = Frobnicate(0.75f); + * auto frob_result = Frobnicate(0.75f); * if (frob_result) { * // Frobbed ok * printf("My cookie is %d\n", *frob_result); * } else { - * printf("Guess I overdid it. :( Error code: %ux\n", frob_result.code().hex); + * printf("Guess I overdid it. :( Error code: %ux\n", frob_result.Code().raw); * } * \endcode */ @@ -283,7 +281,7 @@ private: /** * This function is a helper used to construct `ResultVal`s. It receives the arguments to construct - * `T` with and creates a success `ResultVal` contained the constructed value. + * `T` with and creates a `ResultVal` that contains the constructed value. */ template <typename T, typename... Args> [[nodiscard]] ResultVal<T> MakeResult(Args&&... args) { |