Fix typo

Author: metab0t

lib/core_ext.cpp

@@ -13,7 +13,7 @@
 namespace nb = nanobind;
 
 using CoeffNdarrayT = nb::ndarray<const double, nb::ndim<1>, nb::any_contig>;
-using IndexNdarrayT = nb::ndarray<int, nb::ndim<1>, nb::any_contig>;
+using IndexNdarrayT = nb::ndarray<const int, nb::ndim<1>, nb::any_contig>;
 
 NB_MODULE(core_ext, m)
 {

tests/test_basic.py

@@ -72,7 +72,9 @@ def test_basic():
 def test_affineexpr_from_numpy():
  N = 25
  coefs = np.arange(N, dtype=np.float64)
- vars = np.arange(N, dtype=np.int_)
+ vars = np.arange(N, dtype=np.int_) * 2
+ coefs.flags.writeable = False
+ vars.flags.writeable = False
 
  expr = poi.ScalarAffineFunction.from_numpy(coefs, vars)