guan404ming commented on code in PR #399:
URL: https://github.com/apache/tvm-ffi/pull/399#discussion_r2723612542
##########
include/tvm/ffi/function_details.h:
##########
@@ -67,10 +72,23 @@ static constexpr bool ArgSupported =
std::is_same_v<std::remove_const_t<std::remove_reference_t<T>>, AnyView>
||
TypeTraitsNoCR<T>::convert_enabled));
+template <typename T>
+struct is_expected : std::false_type {
+ using value_type = void;
+};
+
+template <typename T>
+struct is_expected<Expected<T>> : std::true_type {
+ using value_type = T;
+};
+
+template <typename T>
+inline constexpr bool is_expected_v = is_expected<T>::value;
+
// NOTE: return type can only support non-reference managed returns
template <typename T>
-static constexpr bool RetSupported =
- (std::is_same_v<T, Any> || std::is_void_v<T> ||
TypeTraits<T>::convert_enabled);
+static constexpr bool RetSupported = (std::is_same_v<T, Any> ||
std::is_void_v<T> ||
+ TypeTraits<T>::convert_enabled ||
is_expected_v<T>);
Review Comment:
You right, let me remove it.
##########
include/tvm/ffi/function_details.h:
##########
@@ -67,10 +72,23 @@ static constexpr bool ArgSupported =
std::is_same_v<std::remove_const_t<std::remove_reference_t<T>>, AnyView>
||
TypeTraitsNoCR<T>::convert_enabled));
+template <typename T>
+struct is_expected : std::false_type {
+ using value_type = void;
+};
+
+template <typename T>
+struct is_expected<Expected<T>> : std::true_type {
+ using value_type = T;
+};
+
+template <typename T>
+inline constexpr bool is_expected_v = is_expected<T>::value;
+
// NOTE: return type can only support non-reference managed returns
template <typename T>
-static constexpr bool RetSupported =
- (std::is_same_v<T, Any> || std::is_void_v<T> ||
TypeTraits<T>::convert_enabled);
+static constexpr bool RetSupported = (std::is_same_v<T, Any> ||
std::is_void_v<T> ||
+ TypeTraits<T>::convert_enabled ||
is_expected_v<T>);
Review Comment:
You're right, let me remove it.
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