Function _may_have_objects

numpy/core/src/multiarray/common.c:336–346

* check whether arrays with datatype dtype might have object fields. This will * only happen for structured dtypes (which may have hidden objects even if the * HASOBJECT flag is false), object dtypes, or subarray dtypes whose base type * is either of these. */

 * is either of these.
 */
NPY_NO_EXPORT int
_may_have_objects(PyArray_Descr *dtype)
{
    PyArray_Descr *base = dtype;
    if (PyDataType_HASSUBARRAY(dtype)) {
        base = dtype->subarray->base;
    }

    return (PyDataType_HASFIELDS(base) ||
            PyDataType_FLAGCHK(base, NPY_ITEM_HASOBJECT) );
}

/*
 * Make a new empty array, of the passed size, of a type that takes the