fix(ops): set recurtion limit to 1000

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Set recursion limit to 1000 for all platforms by [@XuehaiPan](https://github.com/XuehaiPan) in [#121](https://github.com/metaopt/optree/pull/121).
 - Allow types to be registered in both the global namespace and custom namespaces by [@XuehaiPan](https://github.com/XuehaiPan) in [#124](https://github.com/metaopt/optree/pull/124).
 - Set `treespec_is_leaf` as strict by default by [@XuehaiPan](https://github.com/XuehaiPan) in [#120](https://github.com/metaopt/optree/pull/120).
 - Reorder functions for better code correspondence between C++ and Python by [@XuehaiPan](https://github.com/XuehaiPan) in [#117](https://github.com/metaopt/optree/pull/117).

include/treespec.h

@@ -38,7 +38,7 @@ using size_t = py::size_t;
 using ssize_t = py::ssize_t;
 
 // The maximum depth of a pytree.
-constexpr ssize_t MAX_RECURSION_DEPTH = 2000;
+constexpr ssize_t MAX_RECURSION_DEPTH = 1000;
 
 // Test whether the given object is a leaf node.
 bool IsLeaf(const py::object &object,

optree/__init__.py

@@ -184,8 +184,8 @@
     'structseq_fields',
 ]
 
-MAX_RECURSION_DEPTH: int = MAX_RECURSION_DEPTH  # 2000
-"""Maximum recursion depth for pytree traversal. It is 2000.
+MAX_RECURSION_DEPTH: int = MAX_RECURSION_DEPTH  # 1000
+"""Maximum recursion depth for pytree traversal. It is 1000.
 
 This limit prevents infinite recursion from causing an overflow of the C stack
 and crashing Python.

optree/ops.py

@@ -109,8 +109,8 @@
     'prefix_errors',
 ]
 
-MAX_RECURSION_DEPTH: int = _C.MAX_RECURSION_DEPTH  # 2000
-"""Maximum recursion depth for pytree traversal. It is 2000.
+MAX_RECURSION_DEPTH: int = _C.MAX_RECURSION_DEPTH  # 1000
+"""Maximum recursion depth for pytree traversal. It is 1000.
 
 This limit prevents infinite recursion from causing an overflow of the C stack
 and crashing Python.