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-rw-r--r--src/common/CMakeLists.txt1
-rw-r--r--src/common/expected.h987
-rw-r--r--src/core/file_sys/romfs_factory.cpp10
-rw-r--r--src/core/file_sys/savedata_factory.cpp4
-rw-r--r--src/core/file_sys/sdmc_factory.cpp2
-rw-r--r--src/core/hle/kernel/k_page_table.cpp4
-rw-r--r--src/core/hle/result.h210
-rw-r--r--src/core/hle/service/filesystem/filesystem.cpp21
-rw-r--r--src/core/hle/service/glue/glue_manager.cpp4
-rw-r--r--src/core/hle/service/ldr/ldr.cpp4
-rw-r--r--src/core/hle/service/mii/mii_manager.cpp4
-rw-r--r--src/core/hle/service/ns/ns.cpp4
-rw-r--r--src/core/hle/service/sm/sm.cpp4
-rw-r--r--src/core/hle/service/spl/spl_module.cpp26
-rw-r--r--src/core/hle/service/vi/vi.cpp10
15 files changed, 1103 insertions, 192 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index cb5c0f326..23d43a394 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -55,6 +55,7 @@ add_library(common STATIC
dynamic_library.h
error.cpp
error.h
+ expected.h
fiber.cpp
fiber.h
fs/file.cpp
diff --git a/src/common/expected.h b/src/common/expected.h
new file mode 100644
index 000000000..c8d8579c1
--- /dev/null
+++ b/src/common/expected.h
@@ -0,0 +1,987 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This is based on the proposed implementation of std::expected (P0323)
+// https://github.com/TartanLlama/expected/blob/master/include/tl/expected.hpp
+
+#pragma once
+
+#include <type_traits>
+#include <utility>
+
+namespace Common {
+
+template <typename T, typename E>
+class Expected;
+
+template <typename E>
+class Unexpected {
+public:
+ Unexpected() = delete;
+
+ constexpr explicit Unexpected(const E& e) : m_val{e} {}
+
+ constexpr explicit Unexpected(E&& e) : m_val{std::move(e)} {}
+
+ constexpr E& value() & {
+ return m_val;
+ }
+
+ constexpr const E& value() const& {
+ return m_val;
+ }
+
+ constexpr E&& value() && {
+ return std::move(m_val);
+ }
+
+ constexpr const E&& value() const&& {
+ return std::move(m_val);
+ }
+
+private:
+ E m_val;
+};
+
+template <typename E>
+constexpr auto operator<=>(const Unexpected<E>& lhs, const Unexpected<E>& rhs) {
+ return lhs.value() <=> rhs.value();
+}
+
+struct unexpect_t {
+ constexpr explicit unexpect_t() = default;
+};
+
+namespace detail {
+
+struct no_init_t {
+ constexpr explicit no_init_t() = default;
+};
+
+/**
+ * This specialization is for when T is not trivially destructible,
+ * so the destructor must be called on destruction of `expected'
+ * Additionally, this requires E to be trivially destructible
+ */
+template <typename T, typename E, bool = std::is_trivially_destructible_v<T>>
+requires std::is_trivially_destructible_v<E>
+struct expected_storage_base {
+ constexpr expected_storage_base() : m_val{T{}}, m_has_val{true} {}
+
+ constexpr expected_storage_base(no_init_t) : m_has_val{false} {}
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<T, Args&&...>>* = nullptr>
+ constexpr expected_storage_base(std::in_place_t, Args&&... args)
+ : m_val{std::forward<Args>(args)...}, m_has_val{true} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<T, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr expected_storage_base(std::in_place_t, std::initializer_list<U> il, Args&&... args)
+ : m_val{il, std::forward<Args>(args)...}, m_has_val{true} {}
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<E, Args&&...>>* = nullptr>
+ constexpr explicit expected_storage_base(unexpect_t, Args&&... args)
+ : m_unexpect{std::forward<Args>(args)...}, m_has_val{false} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<E, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr explicit expected_storage_base(unexpect_t, std::initializer_list<U> il,
+ Args&&... args)
+ : m_unexpect{il, std::forward<Args>(args)...}, m_has_val{false} {}
+
+ ~expected_storage_base() {
+ if (m_has_val) {
+ m_val.~T();
+ }
+ }
+
+ union {
+ T m_val;
+ Unexpected<E> m_unexpect;
+ };
+
+ bool m_has_val;
+};
+
+/**
+ * This specialization is for when T is trivially destructible,
+ * so the destructor of `expected` can be trivial
+ * Additionally, this requires E to be trivially destructible
+ */
+template <typename T, typename E>
+requires std::is_trivially_destructible_v<E>
+struct expected_storage_base<T, E, true> {
+ constexpr expected_storage_base() : m_val{T{}}, m_has_val{true} {}
+
+ constexpr expected_storage_base(no_init_t) : m_has_val{false} {}
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<T, Args&&...>>* = nullptr>
+ constexpr expected_storage_base(std::in_place_t, Args&&... args)
+ : m_val{std::forward<Args>(args)...}, m_has_val{true} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<T, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr expected_storage_base(std::in_place_t, std::initializer_list<U> il, Args&&... args)
+ : m_val{il, std::forward<Args>(args)...}, m_has_val{true} {}
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<E, Args&&...>>* = nullptr>
+ constexpr explicit expected_storage_base(unexpect_t, Args&&... args)
+ : m_unexpect{std::forward<Args>(args)...}, m_has_val{false} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<E, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr explicit expected_storage_base(unexpect_t, std::initializer_list<U> il,
+ Args&&... args)
+ : m_unexpect{il, std::forward<Args>(args)...}, m_has_val{false} {}
+
+ ~expected_storage_base() = default;
+
+ union {
+ T m_val;
+ Unexpected<E> m_unexpect;
+ };
+
+ bool m_has_val;
+};
+
+template <typename T, typename E>
+struct expected_operations_base : expected_storage_base<T, E> {
+ using expected_storage_base<T, E>::expected_storage_base;
+
+ template <typename... Args>
+ void construct(Args&&... args) noexcept {
+ new (std::addressof(this->m_val)) T{std::forward<Args>(args)...};
+ this->m_has_val = true;
+ }
+
+ template <typename Rhs>
+ void construct_with(Rhs&& rhs) noexcept {
+ new (std::addressof(this->m_val)) T{std::forward<Rhs>(rhs).get()};
+ this->m_has_val = true;
+ }
+
+ template <typename... Args>
+ void construct_error(Args&&... args) noexcept {
+ new (std::addressof(this->m_unexpect)) Unexpected<E>{std::forward<Args>(args)...};
+ this->m_has_val = false;
+ }
+
+ void assign(const expected_operations_base& rhs) noexcept {
+ if (!this->m_has_val && rhs.m_has_val) {
+ geterr().~Unexpected<E>();
+ construct(rhs.get());
+ } else {
+ assign_common(rhs);
+ }
+ }
+
+ void assign(expected_operations_base&& rhs) noexcept {
+ if (!this->m_has_val && rhs.m_has_val) {
+ geterr().~Unexpected<E>();
+ construct(std::move(rhs).get());
+ } else {
+ assign_common(rhs);
+ }
+ }
+
+ template <typename Rhs>
+ void assign_common(Rhs&& rhs) {
+ if (this->m_has_val) {
+ if (rhs.m_has_val) {
+ get() = std::forward<Rhs>(rhs).get();
+ } else {
+ destroy_val();
+ construct_error(std::forward<Rhs>(rhs).geterr());
+ }
+ } else {
+ if (!rhs.m_has_val) {
+ geterr() = std::forward<Rhs>(rhs).geterr();
+ }
+ }
+ }
+
+ bool has_value() const {
+ return this->m_has_val;
+ }
+
+ constexpr T& get() & {
+ return this->m_val;
+ }
+
+ constexpr const T& get() const& {
+ return this->m_val;
+ }
+
+ constexpr T&& get() && {
+ return std::move(this->m_val);
+ }
+
+ constexpr const T&& get() const&& {
+ return std::move(this->m_val);
+ }
+
+ constexpr Unexpected<E>& geterr() & {
+ return this->m_unexpect;
+ }
+
+ constexpr const Unexpected<E>& geterr() const& {
+ return this->m_unexpect;
+ }
+
+ constexpr Unexpected<E>&& geterr() && {
+ return std::move(this->m_unexpect);
+ }
+
+ constexpr const Unexpected<E>&& geterr() const&& {
+ return std::move(this->m_unexpect);
+ }
+
+ constexpr void destroy_val() {
+ get().~T();
+ }
+};
+
+/**
+ * This manages conditionally having a trivial copy constructor
+ * This specialization is for when T is trivially copy constructible
+ * Additionally, this requires E to be trivially copy constructible
+ */
+template <typename T, typename E, bool = std::is_trivially_copy_constructible_v<T>>
+requires std::is_trivially_copy_constructible_v<E>
+struct expected_copy_base : expected_operations_base<T, E> {
+ using expected_operations_base<T, E>::expected_operations_base;
+};
+
+/**
+ * This specialization is for when T is not trivially copy constructible
+ * Additionally, this requires E to be trivially copy constructible
+ */
+template <typename T, typename E>
+requires std::is_trivially_copy_constructible_v<E>
+struct expected_copy_base<T, E, false> : expected_operations_base<T, E> {
+ using expected_operations_base<T, E>::expected_operations_base;
+
+ expected_copy_base() = default;
+
+ expected_copy_base(const expected_copy_base& rhs)
+ : expected_operations_base<T, E>{no_init_t{}} {
+ if (rhs.has_value()) {
+ this->construct_with(rhs);
+ } else {
+ this->construct_error(rhs.geterr());
+ }
+ }
+
+ expected_copy_base(expected_copy_base&&) = default;
+
+ expected_copy_base& operator=(const expected_copy_base&) = default;
+
+ expected_copy_base& operator=(expected_copy_base&&) = default;
+};
+
+/**
+ * This manages conditionally having a trivial move constructor
+ * This specialization is for when T is trivially move constructible
+ * Additionally, this requires E to be trivially move constructible
+ */
+template <typename T, typename E, bool = std::is_trivially_move_constructible_v<T>>
+requires std::is_trivially_move_constructible_v<E>
+struct expected_move_base : expected_copy_base<T, E> {
+ using expected_copy_base<T, E>::expected_copy_base;
+};
+
+/**
+ * This specialization is for when T is not trivially move constructible
+ * Additionally, this requires E to be trivially move constructible
+ */
+template <typename T, typename E>
+requires std::is_trivially_move_constructible_v<E>
+struct expected_move_base<T, E, false> : expected_copy_base<T, E> {
+ using expected_copy_base<T, E>::expected_copy_base;
+
+ expected_move_base() = default;
+
+ expected_move_base(const expected_move_base&) = default;
+
+ expected_move_base(expected_move_base&& rhs) noexcept(std::is_nothrow_move_constructible_v<T>)
+ : expected_copy_base<T, E>{no_init_t{}} {
+ if (rhs.has_value()) {
+ this->construct_with(std::move(rhs));
+ } else {
+ this->construct_error(std::move(rhs.geterr()));
+ }
+ }
+
+ expected_move_base& operator=(const expected_move_base&) = default;
+
+ expected_move_base& operator=(expected_move_base&&) = default;
+};
+
+/**
+ * This manages conditionally having a trivial copy assignment operator
+ * This specialization is for when T is trivially copy assignable
+ * Additionally, this requires E to be trivially copy assignable
+ */
+template <typename T, typename E,
+ bool = std::conjunction_v<std::is_trivially_copy_assignable<T>,
+ std::is_trivially_copy_constructible<T>,
+ std::is_trivially_destructible<T>>>
+requires std::conjunction_v<std::is_trivially_copy_assignable<E>,
+ std::is_trivially_copy_constructible<E>,
+ std::is_trivially_destructible<E>>
+struct expected_copy_assign_base : expected_move_base<T, E> {
+ using expected_move_base<T, E>::expected_move_base;
+};
+
+/**
+ * This specialization is for when T is not trivially copy assignable
+ * Additionally, this requires E to be trivially copy assignable
+ */
+template <typename T, typename E>
+requires std::conjunction_v<std::is_trivially_copy_assignable<E>,
+ std::is_trivially_copy_constructible<E>,
+ std::is_trivially_destructible<E>>
+struct expected_copy_assign_base<T, E, false> : expected_move_base<T, E> {
+ using expected_move_base<T, E>::expected_move_base;
+
+ expected_copy_assign_base() = default;
+
+ expected_copy_assign_base(const expected_copy_assign_base&) = default;
+
+ expected_copy_assign_base(expected_copy_assign_base&&) = default;
+
+ expected_copy_assign_base& operator=(const expected_copy_assign_base& rhs) {
+ this->assign(rhs);
+ return *this;
+ }
+
+ expected_copy_assign_base& operator=(expected_copy_assign_base&&) = default;
+};
+
+/**
+ * This manages conditionally having a trivial move assignment operator
+ * This specialization is for when T is trivially move assignable
+ * Additionally, this requires E to be trivially move assignable
+ */
+template <typename T, typename E,
+ bool = std::conjunction_v<std::is_trivially_move_assignable<T>,
+ std::is_trivially_move_constructible<T>,
+ std::is_trivially_destructible<T>>>
+requires std::conjunction_v<std::is_trivially_move_assignable<E>,
+ std::is_trivially_move_constructible<E>,
+ std::is_trivially_destructible<E>>
+struct expected_move_assign_base : expected_copy_assign_base<T, E> {
+ using expected_copy_assign_base<T, E>::expected_copy_assign_base;
+};
+
+/**
+ * This specialization is for when T is not trivially move assignable
+ * Additionally, this requires E to be trivially move assignable
+ */
+template <typename T, typename E>
+requires std::conjunction_v<std::is_trivially_move_assignable<E>,
+ std::is_trivially_move_constructible<E>,
+ std::is_trivially_destructible<E>>
+struct expected_move_assign_base<T, E, false> : expected_copy_assign_base<T, E> {
+ using expected_copy_assign_base<T, E>::expected_copy_assign_base;
+
+ expected_move_assign_base() = default;
+
+ expected_move_assign_base(const expected_move_assign_base&) = default;
+
+ expected_move_assign_base(expected_move_assign_base&&) = default;
+
+ expected_move_assign_base& operator=(const expected_move_assign_base&) = default;
+
+ expected_move_assign_base& operator=(expected_move_assign_base&& rhs) noexcept(
+ std::conjunction_v<std::is_nothrow_move_constructible<T>,
+ std::is_nothrow_move_assignable<T>>) {
+ this->assign(std::move(rhs));
+ return *this;
+ }
+};
+
+/**
+ * expected_delete_ctor_base will conditionally delete copy and move constructors
+ * depending on whether T is copy/move constructible
+ * Additionally, this requires E to be copy/move constructible
+ */
+template <typename T, typename E, bool EnableCopy = std::is_copy_constructible_v<T>,
+ bool EnableMove = std::is_move_constructible_v<T>>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>>
+struct expected_delete_ctor_base {
+ expected_delete_ctor_base() = default;
+ expected_delete_ctor_base(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base(expected_delete_ctor_base&&) noexcept = default;
+ expected_delete_ctor_base& operator=(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base& operator=(expected_delete_ctor_base&&) noexcept = default;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>>
+struct expected_delete_ctor_base<T, E, true, false> {
+ expected_delete_ctor_base() = default;
+ expected_delete_ctor_base(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base(expected_delete_ctor_base&&) noexcept = delete;
+ expected_delete_ctor_base& operator=(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base& operator=(expected_delete_ctor_base&&) noexcept = default;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>>
+struct expected_delete_ctor_base<T, E, false, true> {
+ expected_delete_ctor_base() = default;
+ expected_delete_ctor_base(const expected_delete_ctor_base&) = delete;
+ expected_delete_ctor_base(expected_delete_ctor_base&&) noexcept = default;
+ expected_delete_ctor_base& operator=(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base& operator=(expected_delete_ctor_base&&) noexcept = default;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>>
+struct expected_delete_ctor_base<T, E, false, false> {
+ expected_delete_ctor_base() = default;
+ expected_delete_ctor_base(const expected_delete_ctor_base&) = delete;
+ expected_delete_ctor_base(expected_delete_ctor_base&&) noexcept = delete;
+ expected_delete_ctor_base& operator=(const expected_delete_ctor_base&) = default;
+ expected_delete_ctor_base& operator=(expected_delete_ctor_base&&) noexcept = default;
+};
+
+/**
+ * expected_delete_assign_base will conditionally delete copy and move assignment operators
+ * depending on whether T is copy/move constructible + assignable
+ * Additionally, this requires E to be copy/move constructible + assignable
+ */
+template <
+ typename T, typename E,
+ bool EnableCopy = std::conjunction_v<std::is_copy_constructible<T>, std::is_copy_assignable<T>>,
+ bool EnableMove = std::conjunction_v<std::is_move_constructible<T>, std::is_move_assignable<T>>>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>,
+ std::is_copy_assignable<E>, std::is_move_assignable<E>>
+struct expected_delete_assign_base {
+ expected_delete_assign_base() = default;
+ expected_delete_assign_base(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base(expected_delete_assign_base&&) noexcept = default;
+ expected_delete_assign_base& operator=(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base& operator=(expected_delete_assign_base&&) noexcept = default;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>,
+ std::is_copy_assignable<E>, std::is_move_assignable<E>>
+struct expected_delete_assign_base<T, E, true, false> {
+ expected_delete_assign_base() = default;
+ expected_delete_assign_base(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base(expected_delete_assign_base&&) noexcept = default;
+ expected_delete_assign_base& operator=(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base& operator=(expected_delete_assign_base&&) noexcept = delete;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>,
+ std::is_copy_assignable<E>, std::is_move_assignable<E>>
+struct expected_delete_assign_base<T, E, false, true> {
+ expected_delete_assign_base() = default;
+ expected_delete_assign_base(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base(expected_delete_assign_base&&) noexcept = default;
+ expected_delete_assign_base& operator=(const expected_delete_assign_base&) = delete;
+ expected_delete_assign_base& operator=(expected_delete_assign_base&&) noexcept = default;
+};
+
+template <typename T, typename E>
+requires std::conjunction_v<std::is_copy_constructible<E>, std::is_move_constructible<E>,
+ std::is_copy_assignable<E>, std::is_move_assignable<E>>
+struct expected_delete_assign_base<T, E, false, false> {
+ expected_delete_assign_base() = default;
+ expected_delete_assign_base(const expected_delete_assign_base&) = default;
+ expected_delete_assign_base(expected_delete_assign_base&&) noexcept = default;
+ expected_delete_assign_base& operator=(const expected_delete_assign_base&) = delete;
+ expected_delete_assign_base& operator=(expected_delete_assign_base&&) noexcept = delete;
+};
+
+/**
+ * This is needed to be able to construct the expected_default_ctor_base which follows,
+ * while still conditionally deleting the default constructor.
+ */
+struct default_constructor_tag {
+ constexpr explicit default_constructor_tag() = default;
+};
+
+/**
+ * expected_default_ctor_base will ensure that expected
+ * has a deleted default constructor if T is not default constructible
+ * This specialization is for when T is default constructible
+ */
+template <typename T, typename E, bool Enable = std::is_default_constructible_v<T>>
+struct expected_default_ctor_base {
+ constexpr expected_default_ctor_base() noexcept = default;
+ constexpr expected_default_ctor_base(expected_default_ctor_base const&) noexcept = default;
+ constexpr expected_default_ctor_base(expected_default_ctor_base&&) noexcept = default;
+ expected_default_ctor_base& operator=(expected_default_ctor_base const&) noexcept = default;
+ expected_default_ctor_base& operator=(expected_default_ctor_base&&) noexcept = default;
+
+ constexpr explicit expected_default_ctor_base(default_constructor_tag) {}
+};
+
+template <typename T, typename E>
+struct expected_default_ctor_base<T, E, false> {
+ constexpr expected_default_ctor_base() noexcept = delete;
+ constexpr expected_default_ctor_base(expected_default_ctor_base const&) noexcept = default;
+ constexpr expected_default_ctor_base(expected_default_ctor_base&&) noexcept = default;
+ expected_default_ctor_base& operator=(expected_default_ctor_base const&) noexcept = default;
+ expected_default_ctor_base& operator=(expected_default_ctor_base&&) noexcept = default;
+
+ constexpr explicit expected_default_ctor_base(default_constructor_tag) {}
+};
+
+template <typename T, typename E, typename U>
+using expected_enable_forward_value =
+ std::enable_if_t<std::is_constructible_v<T, U&&> &&
+ !std::is_same_v<std::remove_cvref_t<U>, std::in_place_t> &&
+ !std::is_same_v<Expected<T, E>, std::remove_cvref_t<U>> &&
+ !std::is_same_v<Unexpected<E>, std::remove_cvref_t<U>>>;
+
+template <typename T, typename E, typename U, typename G, typename UR, typename GR>
+using expected_enable_from_other = std::enable_if_t<
+ std::is_constructible_v<T, UR> && std::is_constructible_v<E, GR> &&
+ !std::is_constructible_v<T, Expected<U, G>&> && !std::is_constructible_v<T, Expected<U, G>&&> &&
+ !std::is_constructible_v<T, const Expected<U, G>&> &&
+ !std::is_constructible_v<T, const Expected<U, G>&&> &&
+ !std::is_convertible_v<Expected<U, G>&, T> && !std::is_convertible_v<Expected<U, G>&&, T> &&
+ !std::is_convertible_v<const Expected<U, G>&, T> &&
+ !std::is_convertible_v<const Expected<U, G>&&, T>>;
+
+} // namespace detail
+
+template <typename T, typename E>
+class Expected : private detail::expected_move_assign_base<T, E>,
+ private detail::expected_delete_ctor_base<T, E>,
+ private detail::expected_delete_assign_base<T, E>,
+ private detail::expected_default_ctor_base<T, E> {
+public:
+ using value_type = T;
+ using error_type = E;
+ using unexpected_type = Unexpected<E>;
+
+ constexpr Expected() = default;
+ constexpr Expected(const Expected&) = default;
+ constexpr Expected(Expected&&) = default;
+ Expected& operator=(const Expected&) = default;
+ Expected& operator=(Expected&&) = default;
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<T, Args&&...>>* = nullptr>
+ constexpr Expected(std::in_place_t, Args&&... args)
+ : impl_base{std::in_place, std::forward<Args>(args)...},
+ ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<T, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr Expected(std::in_place_t, std::initializer_list<U> il, Args&&... args)
+ : impl_base{std::in_place, il, std::forward<Args>(args)...},
+ ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename G = E, std::enable_if_t<std::is_constructible_v<E, const G&>>* = nullptr,
+ std::enable_if_t<!std::is_convertible_v<const G&, E>>* = nullptr>
+ constexpr explicit Expected(const Unexpected<G>& e)
+ : impl_base{unexpect_t{}, e.value()}, ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename G = E, std::enable_if_t<std::is_constructible_v<E, const G&>>* = nullptr,
+ std::enable_if_t<std::is_convertible_v<const G&, E>>* = nullptr>
+ constexpr Expected(Unexpected<G> const& e)
+ : impl_base{unexpect_t{}, e.value()}, ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename G = E, std::enable_if_t<std::is_constructible_v<E, G&&>>* = nullptr,
+ std::enable_if_t<!std::is_convertible_v<G&&, E>>* = nullptr>
+ constexpr explicit Expected(Unexpected<G>&& e) noexcept(std::is_nothrow_constructible_v<E, G&&>)
+ : impl_base{unexpect_t{}, std::move(e.value())}, ctor_base{
+ detail::default_constructor_tag{}} {}
+
+ template <typename G = E, std::enable_if_t<std::is_constructible_v<E, G&&>>* = nullptr,
+ std::enable_if_t<std::is_convertible_v<G&&, E>>* = nullptr>
+ constexpr Expected(Unexpected<G>&& e) noexcept(std::is_nothrow_constructible_v<E, G&&>)
+ : impl_base{unexpect_t{}, std::move(e.value())}, ctor_base{
+ detail::default_constructor_tag{}} {}
+
+ template <typename... Args, std::enable_if_t<std::is_constructible_v<E, Args&&...>>* = nullptr>
+ constexpr explicit Expected(unexpect_t, Args&&... args)
+ : impl_base{unexpect_t{}, std::forward<Args>(args)...},
+ ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_constructible_v<E, std::initializer_list<U>&, Args&&...>>* =
+ nullptr>
+ constexpr explicit Expected(unexpect_t, std::initializer_list<U> il, Args&&... args)
+ : impl_base{unexpect_t{}, il, std::forward<Args>(args)...},
+ ctor_base{detail::default_constructor_tag{}} {}
+
+ template <typename U, typename G,
+ std::enable_if_t<!(std::is_convertible_v<U const&, T> &&
+ std::is_convertible_v<G const&, E>)>* = nullptr,
+ detail::expected_enable_from_other<T, E, U, G, const U&, const G&>* = nullptr>
+ constexpr explicit Expected(const Expected<U, G>& rhs)
+ : ctor_base{detail::default_constructor_tag{}} {
+ if (rhs.has_value()) {
+ this->construct(*rhs);
+ } else {
+ this->construct_error(rhs.error());
+ }
+ }
+
+ template <typename U, typename G,
+ std::enable_if_t<(std::is_convertible_v<U const&, T> &&
+ std::is_convertible_v<G const&, E>)>* = nullptr,
+ detail::expected_enable_from_other<T, E, U, G, const U&, const G&>* = nullptr>
+ constexpr Expected(const Expected<U, G>& rhs) : ctor_base{detail::default_constructor_tag{}} {
+ if (rhs.has_value()) {
+ this->construct(*rhs);
+ } else {
+ this->construct_error(rhs.error());
+ }
+ }
+
+ template <typename U, typename G,
+ std::enable_if_t<!(std::is_convertible_v<U&&, T> && std::is_convertible_v<G&&, E>)>* =
+ nullptr,
+ detail::expected_enable_from_other<T, E, U, G, U&&, G&&>* = nullptr>
+ constexpr explicit Expected(Expected<U, G>&& rhs)
+ : ctor_base{detail::default_constructor_tag{}} {
+ if (rhs.has_value()) {
+ this->construct(std::move(*rhs));
+ } else {
+ this->construct_error(std::move(rhs.error()));
+ }
+ }
+
+ template <typename U, typename G,
+ std::enable_if_t<(std::is_convertible_v<U&&, T> && std::is_convertible_v<G&&, E>)>* =
+ nullptr,
+ detail::expected_enable_from_other<T, E, U, G, U&&, G&&>* = nullptr>
+ constexpr Expected(Expected<U, G>&& rhs) : ctor_base{detail::default_constructor_tag{}} {
+ if (rhs.has_value()) {
+ this->construct(std::move(*rhs));
+ } else {
+ this->construct_error(std::move(rhs.error()));
+ }
+ }
+
+ template <typename U = T, std::enable_if_t<!std::is_convertible_v<U&&, T>>* = nullptr,
+ detail::expected_enable_forward_value<T, E, U>* = nullptr>
+ constexpr explicit Expected(U&& v) : Expected{std::in_place, std::forward<U>(v)} {}
+
+ template <typename U = T, std::enable_if_t<std::is_convertible_v<U&&, T>>* = nullptr,
+ detail::expected_enable_forward_value<T, E, U>* = nullptr>
+ constexpr Expected(U&& v) : Expected{std::in_place, std::forward<U>(v)} {}
+
+ template <typename U = T, typename G = T,
+ std::enable_if_t<std::is_nothrow_constructible_v<T, U&&>>* = nullptr,
+ std::enable_if_t<(
+ !std::is_same_v<Expected<T, E>, std::remove_cvref_t<U>> &&
+ !std::conjunction_v<std::is_scalar<T>, std::is_same<T, std::remove_cvref_t<U>>> &&
+ std::is_constructible_v<T, U> && std::is_assignable_v<G&, U> &&
+ std::is_nothrow_move_constructible_v<E>)>* = nullptr>
+ Expected& operator=(U&& v) {
+ if (has_value()) {
+ val() = std::forward<U>(v);
+ } else {
+ err().~Unexpected<E>();
+ new (valptr()) T{std::forward<U>(v)};
+ this->m_has_val = true;
+ }
+
+ return *this;
+ }
+
+ template <typename U = T, typename G = T,
+ std::enable_if_t<!std::is_nothrow_constructible_v<T, U&&>>* = nullptr,
+ std::enable_if_t<(
+ !std::is_same_v<Expected<T, E>, std::remove_cvref_t<U>> &&
+ !std::conjunction_v<std::is_scalar<T>, std::is_same<T, std::remove_cvref_t<U>>> &&
+ std::is_constructible_v<T, U> && std::is_assignable_v<G&, U> &&
+ std::is_nothrow_move_constructible_v<E>)>* = nullptr>
+ Expected& operator=(U&& v) {
+ if (has_value()) {
+ val() = std::forward<U>(v);
+ } else {
+ auto tmp = std::move(err());
+ err().~Unexpected<E>();
+ new (valptr()) T{std::forward<U>(v)};
+ this->m_has_val = true;
+ }
+
+ return *this;
+ }
+
+ template <typename G = E, std::enable_if_t<std::is_nothrow_copy_constructible_v<G> &&
+ std::is_assignable_v<G&, G>>* = nullptr>
+ Expected& operator=(const Unexpected<G>& rhs) {
+ if (!has_value()) {
+ err() = rhs;
+ } else {
+ this->destroy_val();
+ new (errptr()) Unexpected<E>{rhs};
+ this->m_has_val = false;
+ }
+
+ return *this;
+ }
+
+ template <typename G = E, std::enable_if_t<std::is_nothrow_move_constructible_v<G> &&
+ std::is_move_assignable_v<G>>* = nullptr>
+ Expected& operator=(Unexpected<G>&& rhs) noexcept {
+ if (!has_value()) {
+ err() = std::move(rhs);
+ } else {
+ this->destroy_val();
+ new (errptr()) Unexpected<E>{std::move(rhs)};
+ this->m_has_val = false;
+ }
+
+ return *this;
+ }
+
+ template <typename... Args,
+ std::enable_if_t<std::is_nothrow_constructible_v<T, Args&&...>>* = nullptr>
+ void emplace(Args&&... args) {
+ if (has_value()) {
+ val() = T{std::forward<Args>(args)...};
+ } else {
+ err().~Unexpected<E>();
+ new (valptr()) T{std::forward<Args>(args)...};
+ this->m_has_val = true;
+ }
+ }
+
+ template <typename... Args,
+ std::enable_if_t<!std::is_nothrow_constructible_v<T, Args&&...>>* = nullptr>
+ void emplace(Args&&... args) {
+ if (has_value()) {
+ val() = T{std::forward<Args>(args)...};
+ } else {
+ auto tmp = std::move(err());
+ err().~Unexpected<E>();
+ new (valptr()) T{std::forward<Args>(args)...};
+ this->m_has_val = true;
+ }
+ }
+
+ template <typename U, typename... Args,
+ std::enable_if_t<std::is_nothrow_constructible_v<T, std::initializer_list<U>&,
+ Args&&...>>* = nullptr>
+ void emplace(std::initializer_list<U> il, Args&&... args) {
+ if (has_value()) {
+ T t{il, std::forward<Args>(args)...};
+ val() = std::move(t);
+ } else {
+ err().~Unexpected<E>();
+ new (valptr()) T{il, std::forward<Args>(args)...};
+ this->m_has_val = true;
+ }
+ }
+
+ template <typename U, typename... Args,
+ std::enable_if_t<!std::is_nothrow_constructible_v<T, std::initializer_list<U>&,
+ Args&&...>>* = nullptr>
+ void emplace(std::initializer_list<U> il, Args&&... args) {
+ if (has_value()) {
+ T t{il, std::forward<Args>(args)...};
+ val() = std::move(t);
+ } else {
+ auto tmp = std::move(err());
+ err().~Unexpected<E>();
+ new (valptr()) T{il, std::forward<Args>(args)...};
+ this->m_has_val = true;
+ }
+ }
+
+ constexpr T* operator->() {
+ return valptr();
+ }
+
+ constexpr const T* operator->() const {
+ return valptr();
+ }
+
+ template <typename U = T>
+ constexpr U& operator*() & {
+ return val();
+ }
+
+ template <typename U = T>
+ constexpr const U& operator*() const& {
+ return val();
+ }
+
+ template <typename U = T>
+ constexpr U&& operator*() && {
+ return std::move(val());
+ }
+
+ template <typename U = T>
+ constexpr const U&& operator*() const&& {
+ return std::move(val());
+ }
+
+ constexpr bool has_value() const noexcept {
+ return this->m_has_val;
+ }
+
+ constexpr explicit operator bool() const noexcept {
+ return this->m_has_val;
+ }
+
+ template <typename U = T>
+ constexpr U& value() & {
+ return val();
+ }
+
+ template <typename U = T>
+ constexpr const U& value() const& {
+ return val();
+ }
+
+ template <typename U = T>
+ constexpr U&& value() && {
+ return std::move(val());
+ }
+
+ template <typename U = T>
+ constexpr const U&& value() const&& {
+ return std::move(val());
+ }
+
+ constexpr E& error() & {
+ return err().value();
+ }
+
+ constexpr const E& error() const& {
+ return err().value();
+ }
+
+ constexpr E&& error() && {
+ return std::move(err().value());
+ }
+
+ constexpr const E&& error() const&& {
+ return std::move(err().value());
+ }
+
+ template <typename U>
+ constexpr T value_or(U&& v) const& {
+ static_assert(std::is_copy_constructible_v<T> && std::is_convertible_v<U&&, T>,
+ "T must be copy-constructible and convertible from U&&");
+ return bool(*this) ? **this : static_cast<T>(std::forward<U>(v));
+ }
+
+ template <typename U>
+ constexpr T value_or(U&& v) && {
+ static_assert(std::is_move_constructible_v<T> && std::is_convertible_v<U&&, T>,
+ "T must be move-constructible and convertible from U&&");
+ return bool(*this) ? std::move(**this) : static_cast<T>(std::forward<U>(v));
+ }
+
+private:
+ static_assert(!std::is_reference_v<T>, "T must not be a reference");
+ static_assert(!std::is_same_v<T, std::remove_cv_t<std::in_place_t>>,
+ "T must not be std::in_place_t");
+ static_assert(!std::is_same_v<T, std::remove_cv_t<unexpect_t>>, "T must not be unexpect_t");
+ static_assert(!std::is_same_v<T, std::remove_cv_t<Unexpected<E>>>,
+ "T must not be Unexpected<E>");
+ static_assert(!std::is_reference_v<E>, "E must not be a reference");
+
+ T* valptr() {
+ return std::addressof(this->m_val);
+ }
+
+ const T* valptr() const {
+ return std::addressof(this->m_val);
+ }
+
+ Unexpected<E>* errptr() {
+ return std::addressof(this->m_unexpect);
+ }
+
+ const Unexpected<E>* errptr() const {
+ return std::addressof(this->m_unexpect);
+ }
+
+ template <typename U = T>
+ constexpr U& val() {
+ return this->m_val;
+ }
+
+ template <typename U = T>
+ constexpr const U& val() const {
+ return this->m_val;
+ }
+
+ constexpr Unexpected<E>& err() {
+ return this->m_unexpect;
+ }
+
+ constexpr const Unexpected<E>& err() const {
+ return this->m_unexpect;
+ }
+
+ using impl_base = detail::expected_move_assign_base<T, E>;
+ using ctor_base = detail::expected_default_ctor_base<T, E>;
+};
+
+template <typename T, typename E, typename U, typename F>
+constexpr bool operator==(const Expected<T, E>& lhs, const Expected<U, F>& rhs) {
+ return (lhs.has_value() != rhs.has_value())
+ ? false
+ : (!lhs.has_value() ? lhs.error() == rhs.error() : *lhs == *rhs);
+}
+
+template <typename T, typename E, typename U, typename F>
+constexpr bool operator!=(const Expected<T, E>& lhs, const Expected<U, F>& rhs) {
+ return !operator==(lhs, rhs);
+}
+
+template <typename T, typename E, typename U>
+constexpr bool operator==(const Expected<T, E>& x, const U& v) {
+ return x.has_value() ? *x == v : false;
+}
+
+template <typename T, typename E, typename U>
+constexpr bool operator==(const U& v, const Expected<T, E>& x) {
+ return x.has_value() ? *x == v : false;
+}
+
+template <typename T, typename E, typename U>
+constexpr bool operator!=(const Expected<T, E>& x, const U& v) {
+ return !operator==(x, v);
+}
+
+template <typename T, typename E, typename U>
+constexpr bool operator!=(const U& v, const Expected<T, E>& x) {
+ return !operator==(v, x);
+}
+
+template <typename T, typename E>
+constexpr bool operator==(const Expected<T, E>& x, const Unexpected<E>& e) {
+ return x.has_value() ? false : x.error() == e.value();
+}
+
+template <typename T, typename E>
+constexpr bool operator==(const Unexpected<E>& e, const Expected<T, E>& x) {
+ return x.has_value() ? false : x.error() == e.value();
+}
+
+template <typename T, typename E>
+constexpr bool operator!=(const Expected<T, E>& x, const Unexpected<E>& e) {
+ return !operator==(x, e);
+}
+
+template <typename T, typename E>
+constexpr bool operator!=(const Unexpected<E>& e, const Expected<T, E>& x) {
+ return !operator==(e, x);
+}
+
+} // namespace Common
diff --git a/src/core/file_sys/romfs_factory.cpp b/src/core/file_sys/romfs_factory.cpp
index 638c6cea8..3d9ce863b 100644
--- a/src/core/file_sys/romfs_factory.cpp
+++ b/src/core/file_sys/romfs_factory.cpp
@@ -39,13 +39,12 @@ void RomFSFactory::SetPackedUpdate(VirtualFile update_raw_file) {
ResultVal<VirtualFile> RomFSFactory::OpenCurrentProcess(u64 current_process_title_id) const {
if (!updatable) {
- return MakeResult<VirtualFile>(file);
+ return file;
}
const PatchManager patch_manager{current_process_title_id, filesystem_controller,
content_provider};
- return MakeResult<VirtualFile>(
- patch_manager.PatchRomFS(file, ivfc_offset, ContentRecordType::Program, update_raw));
+ return patch_manager.PatchRomFS(file, ivfc_offset, ContentRecordType::Program, update_raw);
}
ResultVal<VirtualFile> RomFSFactory::OpenPatchedRomFS(u64 title_id, ContentRecordType type) const {
@@ -58,8 +57,7 @@ ResultVal<VirtualFile> RomFSFactory::OpenPatchedRomFS(u64 title_id, ContentRecor
const PatchManager patch_manager{title_id, filesystem_controller, content_provider};
- return MakeResult<VirtualFile>(
- patch_manager.PatchRomFS(nca->GetRomFS(), nca->GetBaseIVFCOffset(), type));
+ return patch_manager.PatchRomFS(nca->GetRomFS(), nca->GetBaseIVFCOffset(), type);
}
ResultVal<VirtualFile> RomFSFactory::OpenPatchedRomFSWithProgramIndex(
@@ -83,7 +81,7 @@ ResultVal<VirtualFile> RomFSFactory::Open(u64 title_id, StorageId storage,
return ResultUnknown;
}
- return MakeResult<VirtualFile>(romfs);
+ return romfs;
}
std::shared_ptr<NCA> RomFSFactory::GetEntry(u64 title_id, StorageId storage,
diff --git a/src/core/file_sys/savedata_factory.cpp b/src/core/file_sys/savedata_factory.cpp
index b5254dd75..0c8ec4ba2 100644
--- a/src/core/file_sys/savedata_factory.cpp
+++ b/src/core/file_sys/savedata_factory.cpp
@@ -94,7 +94,7 @@ ResultVal<VirtualDir> SaveDataFactory::Create(SaveDataSpaceId space,
return ResultUnknown;
}
- return MakeResult<VirtualDir>(std::move(out));
+ return out;
}
ResultVal<VirtualDir> SaveDataFactory::Open(SaveDataSpaceId space,
@@ -115,7 +115,7 @@ ResultVal<VirtualDir> SaveDataFactory::Open(SaveDataSpaceId space,
return ResultUnknown;
}
- return MakeResult<VirtualDir>(std::move(out));
+ return out;
}
VirtualDir SaveDataFactory::GetSaveDataSpaceDirectory(SaveDataSpaceId space) const {
diff --git a/src/core/file_sys/sdmc_factory.cpp b/src/core/file_sys/sdmc_factory.cpp
index e5c72cd4d..c0e13e56f 100644
--- a/src/core/file_sys/sdmc_factory.cpp
+++ b/src/core/file_sys/sdmc_factory.cpp
@@ -25,7 +25,7 @@ SDMCFactory::SDMCFactory(VirtualDir sd_dir_, VirtualDir sd_mod_dir_)
SDMCFactory::~SDMCFactory() = default;
ResultVal<VirtualDir> SDMCFactory::Open() const {
- return MakeResult<VirtualDir>(sd_dir);
+ return sd_dir;
}
VirtualDir SDMCFactory::GetSDMCModificationLoadRoot(u64 title_id) const {
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp
index 5e0b620c2..526b87241 100644
--- a/src/core/hle/kernel/k_page_table.cpp
+++ b/src/core/hle/kernel/k_page_table.cpp
@@ -859,7 +859,7 @@ ResultVal<VAddr> KPageTable::SetHeapSize(std::size_t size) {
current_heap_addr = heap_region_start + size;
}
- return MakeResult<VAddr>(heap_region_start);
+ return heap_region_start;
}
ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages, std::size_t align,
@@ -893,7 +893,7 @@ ResultVal<VAddr> KPageTable::AllocateAndMapMemory(std::size_t needed_num_pages,
block_manager->Update(addr, needed_num_pages, state, perm);
- return MakeResult<VAddr>(addr);
+ return addr;
}
ResultCode KPageTable::LockForDeviceAddressSpace(VAddr addr, std::size_t size) {
diff --git a/src/core/hle/result.h b/src/core/hle/result.h
index 2c6b24848..3807b9aa8 100644
--- a/src/core/hle/result.h
+++ b/src/core/hle/result.h
@@ -4,11 +4,10 @@
#pragma once
-#include <new>
-#include <utility>
#include "common/assert.h"
#include "common/bit_field.h"
#include "common/common_types.h"
+#include "common/expected.h"
// All the constants in this file come from http://switchbrew.org/index.php?title=Error_codes
@@ -155,203 +154,130 @@ 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 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
*/
template <typename T>
class ResultVal {
public:
- /// Constructs an empty `ResultVal` with the given error code. The code must not be a success
- /// code.
- ResultVal(ResultCode error_code = ResultUnknown) : result_code(error_code) {
- ASSERT(error_code.IsError());
- }
+ constexpr ResultVal() : expected{} {}
+
+ constexpr ResultVal(ResultCode code) : expected{Common::Unexpected(code)} {}
+
+ template <typename U>
+ constexpr ResultVal(U&& val) : expected{std::forward<U>(val)} {}
- /**
- * Similar to the non-member function `MakeResult`, with the exception that you can manually
- * specify the success code. `success_code` must not be an error code.
- */
template <typename... Args>
- [[nodiscard]] static ResultVal WithCode(ResultCode success_code, Args&&... args) {
- ResultVal<T> result;
- result.emplace(success_code, std::forward<Args>(args)...);
- return result;
- }
+ constexpr ResultVal(Args&&... args) : expected{std::in_place, std::forward<Args>(args)...} {}
- ResultVal(const ResultVal& o) noexcept : result_code(o.result_code) {
- if (!o.empty()) {
- new (&object) T(o.object);
- }
- }
+ ~ResultVal() = default;
- ResultVal(ResultVal&& o) noexcept : result_code(o.result_code) {
- if (!o.empty()) {
- new (&object) T(std::move(o.object));
- }
- }
+ constexpr ResultVal(const ResultVal&) = default;
+ constexpr ResultVal(ResultVal&&) = default;
- ~ResultVal() {
- if (!empty()) {
- object.~T();
- }
- }
+ ResultVal& operator=(const ResultVal&) = default;
+ ResultVal& operator=(ResultVal&&) = default;
- ResultVal& operator=(const ResultVal& o) noexcept {
- if (this == &o) {
- return *this;
- }
- if (!empty()) {
- if (!o.empty()) {
- object = o.object;
- } else {
- object.~T();
- }
- } else {
- if (!o.empty()) {
- new (&object) T(o.object);
- }
- }
- result_code = o.result_code;
-
- return *this;
+ [[nodiscard]] constexpr explicit operator bool() const noexcept {
+ return expected.has_value();
}
- ResultVal& operator=(ResultVal&& o) noexcept {
- if (this == &o) {
- return *this;
- }
- if (!empty()) {
- if (!o.empty()) {
- object = std::move(o.object);
- } else {
- object.~T();
- }
- } else {
- if (!o.empty()) {
- new (&object) T(std::move(o.object));
- }
- }
- result_code = o.result_code;
-
- return *this;
+ [[nodiscard]] constexpr ResultCode Code() const {
+ return expected.has_value() ? ResultSuccess : expected.error();
}
- /**
- * Replaces the current result with a new constructed result value in-place. The code must not
- * be an error code.
- */
- template <typename... Args>
- void emplace(ResultCode success_code, Args&&... args) {
- ASSERT(success_code.IsSuccess());
- if (!empty()) {
- object.~T();
- }
- new (&object) T(std::forward<Args>(args)...);
- result_code = success_code;
+ [[nodiscard]] constexpr bool Succeeded() const {
+ return expected.has_value();
}
- /// Returns true if the `ResultVal` contains an error code and no value.
- [[nodiscard]] bool empty() const {
- return result_code.IsError();
+ [[nodiscard]] constexpr bool Failed() const {
+ return !expected.has_value();
}
- /// Returns true if the `ResultVal` contains a return value.
- [[nodiscard]] bool Succeeded() const {
- return result_code.IsSuccess();
+ [[nodiscard]] constexpr T* operator->() {
+ return std::addressof(expected.value());
}
- /// Returns true if the `ResultVal` contains an error code and no value.
- [[nodiscard]] bool Failed() const {
- return empty();
+
+ [[nodiscard]] constexpr const T* operator->() const {
+ return std::addressof(expected.value());
}
- [[nodiscard]] ResultCode Code() const {
- return result_code;
+ [[nodiscard]] constexpr T& operator*() & {
+ return *expected;
}
- [[nodiscard]] const T& operator*() const {
- return object;
+ [[nodiscard]] constexpr const T& operator*() const& {
+ return *expected;
}
- [[nodiscard]] T& operator*() {
- return object;
+
+ [[nodiscard]] constexpr T&& operator*() && {
+ return *expected;
}
- [[nodiscard]] const T* operator->() const {
- return &object;
+
+ [[nodiscard]] constexpr const T&& operator*() const&& {
+ return *expected;
}
- [[nodiscard]] T* operator->() {
- return &object;
+
+ [[nodiscard]] constexpr T& Unwrap() & {
+ ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
+ return expected.value();
}
- /// Returns the value contained in this `ResultVal`, or the supplied default if it is missing.
- template <typename U>
- [[nodiscard]] T ValueOr(U&& value) const {
- return !empty() ? object : std::move(value);
+ [[nodiscard]] constexpr const T& Unwrap() const& {
+ ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
+ return expected.value();
}
- /// Asserts that the result succeeded and returns a reference to it.
- [[nodiscard]] T& Unwrap() & {
+ [[nodiscard]] constexpr T&& Unwrap() && {
ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return **this;
+ return std::move(expected.value());
}
- [[nodiscard]] T&& Unwrap() && {
+ [[nodiscard]] constexpr const T&& Unwrap() const&& {
ASSERT_MSG(Succeeded(), "Tried to Unwrap empty ResultVal");
- return std::move(**this);
+ return std::move(expected.value());
}
-private:
- // A union is used to allocate the storage for the value, while allowing us to construct and
- // destruct it at will.
- union {
- T object;
- };
- ResultCode result_code;
-};
+ template <typename U>
+ [[nodiscard]] constexpr T ValueOr(U&& v) const& {
+ return expected.value_or(v);
+ }
-/**
- * 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.
- */
-template <typename T, typename... Args>
-[[nodiscard]] ResultVal<T> MakeResult(Args&&... args) {
- return ResultVal<T>::WithCode(ResultSuccess, std::forward<Args>(args)...);
-}
+ template <typename U>
+ [[nodiscard]] constexpr T ValueOr(U&& v) && {
+ return expected.value_or(v);
+ }
-/**
- * Deducible overload of MakeResult, allowing the template parameter to be ommited if you're just
- * copy or move constructing.
- */
-template <typename Arg>
-[[nodiscard]] ResultVal<std::remove_cvref_t<Arg>> MakeResult(Arg&& arg) {
- return ResultVal<std::remove_cvref_t<Arg>>::WithCode(ResultSuccess, std::forward<Arg>(arg));
-}
+private:
+ // TODO: Replace this with std::expected once it is standardized in the STL.
+ Common::Expected<T, ResultCode> expected;
+};
/**
* Check for the success of `source` (which must evaluate to a ResultVal). If it succeeds, unwraps
diff --git a/src/core/hle/service/filesystem/filesystem.cpp b/src/core/hle/service/filesystem/filesystem.cpp
index f8f9e32f7..42e468ce2 100644
--- a/src/core/hle/service/filesystem/filesystem.cpp
+++ b/src/core/hle/service/filesystem/filesystem.cpp
@@ -226,11 +226,10 @@ ResultVal<FileSys::VirtualFile> VfsDirectoryServiceWrapper::OpenFile(const std::
}
if (mode == FileSys::Mode::Append) {
- return MakeResult<FileSys::VirtualFile>(
- std::make_shared<FileSys::OffsetVfsFile>(file, 0, file->GetSize()));
+ return std::make_shared<FileSys::OffsetVfsFile>(file, 0, file->GetSize());
}
- return MakeResult<FileSys::VirtualFile>(file);
+ return file;
}
ResultVal<FileSys::VirtualDir> VfsDirectoryServiceWrapper::OpenDirectory(const std::string& path_) {
@@ -240,7 +239,7 @@ ResultVal<FileSys::VirtualDir> VfsDirectoryServiceWrapper::OpenDirectory(const s
// TODO(DarkLordZach): Find a better error code for this
return FileSys::ERROR_PATH_NOT_FOUND;
}
- return MakeResult(dir);
+ return dir;
}
ResultVal<FileSys::EntryType> VfsDirectoryServiceWrapper::GetEntryType(
@@ -252,12 +251,12 @@ ResultVal<FileSys::EntryType> VfsDirectoryServiceWrapper::GetEntryType(
auto filename = Common::FS::GetFilename(path);
// TODO(Subv): Some games use the '/' path, find out what this means.
if (filename.empty())
- return MakeResult(FileSys::EntryType::Directory);
+ return FileSys::EntryType::Directory;
if (dir->GetFile(filename) != nullptr)
- return MakeResult(FileSys::EntryType::File);
+ return FileSys::EntryType::File;
if (dir->GetSubdirectory(filename) != nullptr)
- return MakeResult(FileSys::EntryType::Directory);
+ return FileSys::EntryType::Directory;
return FileSys::ERROR_PATH_NOT_FOUND;
}
@@ -270,7 +269,7 @@ ResultVal<FileSys::FileTimeStampRaw> VfsDirectoryServiceWrapper::GetFileTimeStam
if (GetEntryType(path).Failed()) {
return FileSys::ERROR_PATH_NOT_FOUND;
}
- return MakeResult(dir->GetFileTimeStamp(Common::FS::GetFilename(path)));
+ return dir->GetFileTimeStamp(Common::FS::GetFilename(path));
}
FileSystemController::FileSystemController(Core::System& system_) : system{system_} {}
@@ -395,7 +394,7 @@ ResultVal<FileSys::VirtualDir> FileSystemController::OpenSaveDataSpace(
return FileSys::ERROR_ENTITY_NOT_FOUND;
}
- return MakeResult(save_data_factory->GetSaveDataSpaceDirectory(space));
+ return save_data_factory->GetSaveDataSpaceDirectory(space);
}
ResultVal<FileSys::VirtualDir> FileSystemController::OpenSDMC() const {
@@ -421,7 +420,7 @@ ResultVal<FileSys::VirtualDir> FileSystemController::OpenBISPartition(
return FileSys::ERROR_INVALID_ARGUMENT;
}
- return MakeResult<FileSys::VirtualDir>(std::move(part));
+ return part;
}
ResultVal<FileSys::VirtualFile> FileSystemController::OpenBISPartitionStorage(
@@ -437,7 +436,7 @@ ResultVal<FileSys::VirtualFile> FileSystemController::OpenBISPartitionStorage(
return FileSys::ERROR_INVALID_ARGUMENT;
}
- return MakeResult<FileSys::VirtualFile>(std::move(part));
+ return part;
}
u64 FileSystemController::GetFreeSpaceSize(FileSys::StorageId id) const {
diff --git a/src/core/hle/service/glue/glue_manager.cpp b/src/core/hle/service/glue/glue_manager.cpp
index aa9d48c0c..48e133b48 100644
--- a/src/core/hle/service/glue/glue_manager.cpp
+++ b/src/core/hle/service/glue/glue_manager.cpp
@@ -26,7 +26,7 @@ ResultVal<ApplicationLaunchProperty> ARPManager::GetLaunchProperty(u64 title_id)
return ERR_NOT_REGISTERED;
}
- return MakeResult<ApplicationLaunchProperty>(iter->second.launch);
+ return iter->second.launch;
}
ResultVal<std::vector<u8>> ARPManager::GetControlProperty(u64 title_id) const {
@@ -39,7 +39,7 @@ ResultVal<std::vector<u8>> ARPManager::GetControlProperty(u64 title_id) const {
return ERR_NOT_REGISTERED;
}
- return MakeResult<std::vector<u8>>(iter->second.control);
+ return iter->second.control;
}
ResultCode ARPManager::Register(u64 title_id, ApplicationLaunchProperty launch,
diff --git a/src/core/hle/service/ldr/ldr.cpp b/src/core/hle/service/ldr/ldr.cpp
index 24b7e4435..e4b97c1f6 100644
--- a/src/core/hle/service/ldr/ldr.cpp
+++ b/src/core/hle/service/ldr/ldr.cpp
@@ -335,7 +335,7 @@ public:
CASCADE_CODE(result);
if (ValidateRegionForMap(page_table, addr, size)) {
- return MakeResult<VAddr>(addr);
+ return addr;
}
}
@@ -371,7 +371,7 @@ public:
}
if (ValidateRegionForMap(page_table, addr, size)) {
- return MakeResult<VAddr>(addr);
+ return addr;
}
}
diff --git a/src/core/hle/service/mii/mii_manager.cpp b/src/core/hle/service/mii/mii_manager.cpp
index 4fef2aea4..ca4ed35bb 100644
--- a/src/core/hle/service/mii/mii_manager.cpp
+++ b/src/core/hle/service/mii/mii_manager.cpp
@@ -443,14 +443,14 @@ ResultVal<std::vector<MiiInfoElement>> MiiManager::GetDefault(SourceFlag source_
std::vector<MiiInfoElement> result;
if ((source_flag & SourceFlag::Default) == SourceFlag::None) {
- return MakeResult(std::move(result));
+ return result;
}
for (std::size_t index = BaseMiiCount; index < DefaultMiiCount; index++) {
result.emplace_back(BuildDefault(index), Source::Default);
}
- return MakeResult(std::move(result));
+ return result;
}
ResultCode MiiManager::GetIndex([[maybe_unused]] const MiiInfo& info, u32& index) {
diff --git a/src/core/hle/service/ns/ns.cpp b/src/core/hle/service/ns/ns.cpp
index 931b48f72..64ffc8572 100644
--- a/src/core/hle/service/ns/ns.cpp
+++ b/src/core/hle/service/ns/ns.cpp
@@ -414,7 +414,7 @@ ResultVal<u8> IApplicationManagerInterface::GetApplicationDesiredLanguage(
for (const auto lang : *priority_list) {
const auto supported_flag = GetSupportedLanguageFlag(lang);
if (supported_languages == 0 || (supported_languages & supported_flag) == supported_flag) {
- return MakeResult(static_cast<u8>(lang));
+ return static_cast<u8>(lang);
}
}
@@ -448,7 +448,7 @@ ResultVal<u64> IApplicationManagerInterface::ConvertApplicationLanguageToLanguag
return ERR_APPLICATION_LANGUAGE_NOT_FOUND;
}
- return MakeResult(static_cast<u64>(*language_code));
+ return static_cast<u64>(*language_code);
}
IApplicationVersionInterface::IApplicationVersionInterface(Core::System& system_)
diff --git a/src/core/hle/service/sm/sm.cpp b/src/core/hle/service/sm/sm.cpp
index ae4dc4a75..41abb146c 100644
--- a/src/core/hle/service/sm/sm.cpp
+++ b/src/core/hle/service/sm/sm.cpp
@@ -87,7 +87,7 @@ ResultVal<Kernel::KPort*> ServiceManager::GetServicePort(const std::string& name
auto handler = it->second;
port->GetServerPort().SetSessionHandler(std::move(handler));
- return MakeResult(port);
+ return port;
}
/**
@@ -165,7 +165,7 @@ ResultVal<Kernel::KClientSession*> SM::GetServiceImpl(Kernel::HLERequestContext&
LOG_DEBUG(Service_SM, "called service={} -> session={}", name, session->GetId());
- return MakeResult(session);
+ return session;
}
void SM::RegisterService(Kernel::HLERequestContext& ctx) {
diff --git a/src/core/hle/service/spl/spl_module.cpp b/src/core/hle/service/spl/spl_module.cpp
index ed4c06260..10f7d1461 100644
--- a/src/core/hle/service/spl/spl_module.cpp
+++ b/src/core/hle/service/spl/spl_module.cpp
@@ -120,40 +120,40 @@ ResultVal<u64> Module::Interface::GetConfigImpl(ConfigItem config_item) const {
return ResultSecureMonitorNotImplemented;
case ConfigItem::ExosphereApiVersion:
// Get information about the current exosphere version.
- return MakeResult((u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MAJOR} << 56) |
- (u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MINOR} << 48) |
- (u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MICRO} << 40) |
- (static_cast<u64>(HLE::ApiVersion::GetTargetFirmware())));
+ return (u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MAJOR} << 56) |
+ (u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MINOR} << 48) |
+ (u64{HLE::ApiVersion::ATMOSPHERE_RELEASE_VERSION_MICRO} << 40) |
+ (static_cast<u64>(HLE::ApiVersion::GetTargetFirmware()));
case ConfigItem::ExosphereNeedsReboot:
// We are executing, so we aren't in the process of rebooting.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereNeedsShutdown:
// We are executing, so we aren't in the process of shutting down.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereGitCommitHash:
// Get information about the current exosphere git commit hash.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereHasRcmBugPatch:
// Get information about whether this unit has the RCM bug patched.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereBlankProdInfo:
// Get whether this unit should simulate a "blanked" PRODINFO.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereAllowCalWrites:
// Get whether this unit should allow writing to the calibration partition.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereEmummcType:
// Get what kind of emummc this unit has active.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExospherePayloadAddress:
// Gets the physical address of the reboot payload buffer, if one exists.
return ResultSecureMonitorNotInitialized;
case ConfigItem::ExosphereLogConfiguration:
// Get the log configuration.
- return MakeResult(u64{0});
+ return u64{0};
case ConfigItem::ExosphereForceEnableUsb30:
// Get whether usb 3.0 should be force-enabled.
- return MakeResult(u64{0});
+ return u64{0};
default:
return ResultSecureMonitorInvalidArgument;
}
diff --git a/src/core/hle/service/vi/vi.cpp b/src/core/hle/service/vi/vi.cpp
index 439e7e472..760b528b9 100644
--- a/src/core/hle/service/vi/vi.cpp
+++ b/src/core/hle/service/vi/vi.cpp
@@ -1284,15 +1284,15 @@ private:
static ResultVal<ConvertedScaleMode> ConvertScalingModeImpl(NintendoScaleMode mode) {
switch (mode) {
case NintendoScaleMode::None:
- return MakeResult(ConvertedScaleMode::None);
+ return ConvertedScaleMode::None;
case NintendoScaleMode::Freeze:
- return MakeResult(ConvertedScaleMode::Freeze);
+ return ConvertedScaleMode::Freeze;
case NintendoScaleMode::ScaleToWindow:
- return MakeResult(ConvertedScaleMode::ScaleToWindow);
+ return ConvertedScaleMode::ScaleToWindow;
case NintendoScaleMode::ScaleAndCrop:
- return MakeResult(ConvertedScaleMode::ScaleAndCrop);
+ return ConvertedScaleMode::ScaleAndCrop;
case NintendoScaleMode::PreserveAspectRatio:
- return MakeResult(ConvertedScaleMode::PreserveAspectRatio);
+ return ConvertedScaleMode::PreserveAspectRatio;
default:
LOG_ERROR(Service_VI, "Invalid scaling mode specified, mode={}", mode);
return ERR_OPERATION_FAILED;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 04:29:08 +0100