[Mlir-commits] [mlir] [MLIR] [Python] Added return type to `__repr__` in the adaptors (PR #182867)

[Sergei Lebedev]

https://github.com/superbobry updated https://github.com/llvm/llvm-project/pull/182867

>From d7ab9b63cc2876dac3ad7305d20665ac25da4b6f Mon Sep 17 00:00:00 2001
From: Sergei Lebedev <slebedev at google.com>
Date: Mon, 23 Feb 2026 15:12:23 +0000
Subject: [PATCH] [MLIR] [Python] Added return type to `__repr__` in the
 adaptors

Without an explicit annotation the return type is inferred as nanobind::object
which results in invalid type stubs, since __repr__ must return str.
---
 mlir/include/mlir/Bindings/Python/NanobindAdaptors.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mlir/include/mlir/Bindings/Python/NanobindAdaptors.h b/mlir/include/mlir/Bindings/Python/NanobindAdaptors.h
index 918030824c409..9b54baa5bd4b1 100644
--- a/mlir/include/mlir/Bindings/Python/NanobindAdaptors.h
+++ b/mlir/include/mlir/Bindings/Python/NanobindAdaptors.h
@@ -570,8 +570,9 @@ class mlir_attribute_subclass : public pure_subclass {
         [isaFunction](MlirAttribute other) { return isaFunction(other); },
         nanobind::arg("other_attribute"), nanobind::sig(kIsinstanceSig));
     def("__repr__", [superCls, captureTypeName](nanobind::object self) {
-      return nanobind::repr(superCls(self))
-          .attr("replace")(superCls.attr("__name__"), captureTypeName);
+      return nanobind::cast<std::string>(
+          nanobind::repr(superCls(self))
+              .attr("replace")(superCls.attr("__name__"), captureTypeName));
     });
     if (getTypeIDFunction) {
       def_staticmethod(