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authorLiam <byteslice@airmail.cc>2023-07-15 02:16:39 +0200
committerLiam <byteslice@airmail.cc>2023-08-08 17:09:37 +0200
commit84cb20bc72031947ac9e625b4a2b5e0059dda441 (patch)
tree94e816691b3800153f7955b03ae63cc36dfdb9dc /src/core/hle/result.h
parentMerge pull request #11216 from lat9nq/no-mesa-astc (diff)
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Diffstat (limited to 'src/core/hle/result.h')
-rw-r--r--src/core/hle/result.h153
1 files changed, 0 insertions, 153 deletions
diff --git a/src/core/hle/result.h b/src/core/hle/result.h
index 240f06689..92a1439eb 100644
--- a/src/core/hle/result.h
+++ b/src/core/hle/result.h
@@ -283,159 +283,6 @@ private:
u32 description_end;
};
-/**
- * This is an optional value type. It holds a `Result` 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 Result{ErrorModule::Common, 1};
- * } else {
- * // Frobnicated! Give caller a cookie
- * return 42;
- * }
- * }
- * \endcode
- *
- * \code
- * 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().raw);
- * }
- * \endcode
- */
-template <typename T>
-class ResultVal {
-public:
- constexpr ResultVal() : expected{} {}
-
- constexpr ResultVal(Result code) : expected{Common::Unexpected(code)} {}
-
- constexpr ResultVal(ResultRange range) : expected{Common::Unexpected(range)} {}
-
- template <typename U>
- constexpr ResultVal(U&& val) : expected{std::forward<U>(val)} {}
-
- template <typename... Args>
- constexpr ResultVal(Args&&... args) : expected{std::in_place, std::forward<Args>(args)...} {}
-
- ~ResultVal() = default;
-
- constexpr ResultVal(const ResultVal&) = default;
- constexpr ResultVal(ResultVal&&) = default;
-
- ResultVal& operator=(const ResultVal&) = default;
- ResultVal& operator=(ResultVal&&) = default;
-
- [[nodiscard]] constexpr explicit operator bool() const noexcept {
- return expected.has_value();
- }
-
- [[nodiscard]] constexpr Result Code() const {
- return expected.has_value() ? ResultSuccess : expected.error();
- }
-
- [[nodiscard]] constexpr bool Succeeded() const {
- return expected.has_value();
- }
-
- [[nodiscard]] constexpr bool Failed() const {
- return !expected.has_value();
- }
-
- [[nodiscard]] constexpr T* operator->() {
- return std::addressof(expected.value());
- }
-
- [[nodiscard]] constexpr const T* operator->() const {
- return std::addressof(expected.value());
- }
-
- [[nodiscard]] constexpr T& operator*() & {
- return *expected;
- }
-
- [[nodiscard]] constexpr const T& operator*() const& {
- return *expected;
- }
-
- [[nodiscard]] constexpr T&& operator*() && {
- return *expected;
- }
-
- [[nodiscard]] constexpr const T&& operator*() const&& {
- return *expected;
- }
-
- [[nodiscard]] constexpr T& Unwrap() & {
- ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return expected.value();
- }
-
- [[nodiscard]] constexpr const T& Unwrap() const& {
- ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return expected.value();
- }
-
- [[nodiscard]] constexpr T&& Unwrap() && {
- ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return std::move(expected.value());
- }
-
- [[nodiscard]] constexpr const T&& Unwrap() const&& {
- ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return std::move(expected.value());
- }
-
- template <typename U>
- [[nodiscard]] constexpr T ValueOr(U&& v) const& {
- return expected.value_or(v);
- }
-
- template <typename U>
- [[nodiscard]] constexpr T ValueOr(U&& v) && {
- return expected.value_or(v);
- }
-
-private:
- // TODO (Morph): Replace this with C++23 std::expected.
- Common::Expected<T, Result> expected;
-};
-
-/**
- * Check for the success of `source` (which must evaluate to a ResultVal). If it succeeds, unwraps
- * the contained value and assigns it to `target`, which can be either an l-value expression or a
- * variable declaration. If it fails the return code is returned from the current function. Thus it
- * can be used to cascade errors out, achieving something akin to exception handling.
- */
-#define CASCADE_RESULT(target, source) \
- auto CONCAT2(check_result_L, __LINE__) = source; \
- if (CONCAT2(check_result_L, __LINE__).Failed()) { \
- return CONCAT2(check_result_L, __LINE__).Code(); \
- } \
- target = std::move(*CONCAT2(check_result_L, __LINE__))
-
-/**
- * Analogous to CASCADE_RESULT, but for a bare Result. The code will be propagated if
- * non-success, or discarded otherwise.
- */
-#define CASCADE_CODE(source) \
- do { \
- auto CONCAT2(check_result_L, __LINE__) = source; \
- if (CONCAT2(check_result_L, __LINE__).IsError()) { \
- return CONCAT2(check_result_L, __LINE__); \
- } \
- } while (false)
-
#define R_SUCCEEDED(res) (static_cast<Result>(res).IsSuccess())
#define R_FAILED(res) (static_cast<Result>(res).IsFailure())