junrushao1994 commented on a change in pull request #7330:
URL: https://github.com/apache/tvm/pull/7330#discussion_r563334497
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File path: include/tvm/node/container.h
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@@ -1449,31 +1449,41 @@ namespace runtime {
// Additional overloads for PackedFunc checking.
template <typename T>
struct ObjectTypeChecker<Array<T>> {
- static bool Check(const Object* ptr) {
- if (ptr == nullptr) return true;
- if (!ptr->IsInstance<ArrayNode>()) return false;
+ static Optional<String> Mismatch(const Object* ptr) {
+ if (ptr == nullptr) return Optional<String>();
+ if (!ptr->IsInstance<ArrayNode>()) return
Optional<String>(ptr->GetTypeKey());
Review comment:
```suggestion
if (!ptr->IsInstance<ArrayNode>()) return String(ptr->GetTypeKey());
```
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