[Mlir-commits] [mlir] [mlir][python] Fix PyOperationBase::walk not catching exception in python callback (PR #89225)

[Oleksandr Alex Zinenko]

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@@ -1255,14 +1255,31 @@ void PyOperationBase::walk(
     MlirWalkOrder walkOrder) {
   PyOperation &operation = getOperation();
   operation.checkValid();
+  struct UserData {
+    std::function<MlirWalkResult(MlirOperation)> callback;
+    bool gotException;
+    std::string exceptionWhat;
+    py::object exceptionType;
+  };
+  UserData userData{.callback = callback};
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ftynse wrote:

This is a c++20 feature, LLVM is c++17.

https://github.com/llvm/llvm-project/pull/89225