def make_implementation(space, list_w):
if not list_w:
return space.fromcache(State).empty_impl
if space.config.objspace.std.withsmartresizablelist:
from pypy.objspace.std.smartresizablelist import \
SmartResizableListImplementation
impl = SmartResizableListImplementation(space)
impl.extend(RListImplementation(space, list_w))
return impl
if space.config.objspace.std.withchunklist:
return ChunkedListImplementation(space, list_w)
if space.config.objspace.std.withblist:
from pypy.objspace.std.blistimplementation import BListImplementation
return BListImplementation(space, list_w)
elif space.config.objspace.std.withfastslice:
return SliceTrackingListImplementation(space, list_w)
else:
# check if it's strings only
w_type = space.type(list_w[0])
if (space.is_w(w_type, space.w_str) and
is_homogeneous(space, list_w, w_type)):
strlist = [space.str_w(w_i) for w_i in list_w]
return StrListImplementation(space, strlist)
else:
return RListImplementation(space, list_w)
def make_implementation_with_one_item(space, w_item):
if space.config.objspace.std.withfastslice:
return SliceTrackingListImplementation(space, [w_item])
if space.config.objspace.std.withsmartresizablelist:
from pypy.objspace.std.smartresizablelist import \
SmartResizableListImplementation
impl = SmartResizableListImplementation(space)
impl.append(w_item)
return impl
if space.config.objspace.std.withchunklist:
return ChunkedListImplementation(space, [w_item])
if space.config.objspace.std.withblist:
from pypy.objspace.std.blistimplementation import BListImplementation
return BListImplementation(space, [w_item])
w_type = space.type(w_item)
if space.is_w(w_type, space.w_str):
strlist = [space.str_w(w_item)]
return StrListImplementation(space, strlist)
return RListImplementation(space, [w_item])