def __getitem__(self, item):
"""
Support array type creation by slicing, e.g. double[:, :] specifies
a 2D strided array of doubles. The syntax is the same as for
Cython memoryviews.
"""
assert isinstance(item, (tuple, slice))
def verify_slice(s):
if s.start or s.stop or s.step not in (None, 1):
raise minierror.InvalidTypeSpecification(
"Only a step of 1 may be provided to indicate C or "
"Fortran contiguity")
if isinstance(item, tuple):
step_idx = None
for idx, s in enumerate(item):
verify_slice(s)
if s.step and (step_idx or idx not in (0, len(item) - 1)):
raise minierror.InvalidTypeSpecification(
"Step may only be provided once, and only in the "
"first or last dimension.")
if s.step == 1:
step_idx = idx
return ArrayType(self,
len(item),
is_c_contig=step_idx == len(item) - 1,
is_f_contig=step_idx == 0)
else:
verify_slice(item)
return ArrayType(self, 1, is_c_contig=bool(item.step))
def __init__(self,
fields=None,
name=None,
readonly=False,
packed=False,
**kwargs):
super(struct, self).__init__()
if fields and kwargs:
raise minierror.InvalidTypeSpecification(
"The struct must be either ordered or unordered")
if kwargs:
fields = sort_types(kwargs)
self.fields = fields
self.rank = sum(_sort_key(field) for field in fields)
self.name = name
self.readonly = readonly
self.fielddict = dict(fields)
self.packed = packed
def verify_slice(s):
if s.start or s.stop or s.step not in (None, 1):
raise minierror.InvalidTypeSpecification(
"Only a step of 1 may be provided to indicate C or "
"Fortran contiguity")