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hle/result: Amend ResultVal documentation

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This amends the documentation slightly to reflect the updated interface.
This commit is contained in:
Morph 2021-11-01 10:38:11 -04:00
parent 52e52924bb
commit 98b351758c
1 changed files with 10 additions and 12 deletions
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22
src/core/hle/result.h
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@ -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) {