Trac #32465: Refactor {Matrix,Vector}_double_dense through ..._numpy_…

…dense, add ..._numpy_integer_dense

... in order to define matrix spaces backed by numpy arrays of various
types
https://numpy.org/doc/stable/reference/arrays.scalars.html#signed-
integer-types

For `ZZ`, this could for example provide a separate element
implementation that is never used for arithmetic, but is good enough for
creating matrices in methods such as `vertex_adjacency_matrix` (#32666)

Related earlier ticket: #7920

URL: https://trac.sagemath.org/32465
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Travis Scrimshaw

src/sage/matrix/matrix_double_dense.pxd

@@ -1,12 +1,6 @@
-from .matrix_dense cimport Matrix_dense
-cimport numpy as cnumpy
+from .matrix_numpy_dense cimport Matrix_numpy_dense
 
-cdef class Matrix_double_dense(Matrix_dense):
-    cdef object _numpy_dtype
-    # cdef cnumpy.NPY_TYPES _numpy_dtypeint
-    cdef int _numpy_dtypeint
-    cdef object _python_dtype
-    cdef object _sage_dtype
-    cdef object _sage_vector_dtype
-    cdef Matrix_double_dense _new(self, int nrows=*, int ncols=*)
-    cdef cnumpy.ndarray _matrix_numpy
+
+cdef class Matrix_double_dense(Matrix_numpy_dense):
+
+    pass