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Numpy has the functions numpy.ascontiguousarray and numpy.asfortranarray.
Currently, in xtensor-blas, we have a view_eval which is passing through things that have a raw data interface, but should really behave like numpy.ascontiguousarray or numpy.asfortranarray.
I guess that we could have a
template<layout_type L=xt::layout_type::any, class E>
return_type contiguous(E&&)
which would basically
if L = layout_type::any (the default with unspecified ):
pass-through anything that has a static contiguous layout already
behave like contiguous<XTENSOR_DEFAULT_LAYOUT> otherwise.
if L = layout_type::row_major:
for objects that have a raw data interface
a. pass them through if they have a runtime layout of row_major (they are already row-major-contiguous)
b. return a container otherwise
return a container otherwise
if L = layout_type::column_major:
for objects that have a raw data interface
a. pass them through if they have a runtime layout of column_major (they are already column-major-contiguous)
b. return a container otherwise
return a container otherwise
The difficulty is with unifying the return type of a and b in both cases.
One way to do this is to make it return a [xarray/xtensor]_adaptor on a new buffer adaptor type, which would be the same type for owning and non-owning cases, where the owning would be a runtime attribute set in the constructor.
The text was updated successfully, but these errors were encountered:
the current eval is not only meant for this but to flatten the expression tree so that there is no more closure. While this would not do it in case of a view.
also for the latter use case, an expression like linspace does not depend on closure can can safely be returned from a function without an eval.
Numpy has the functions
numpy.ascontiguousarray
andnumpy.asfortranarray
.Currently, in
xtensor-blas
, we have aview_eval
which is passing through things that have a raw data interface, but should really behave likenumpy.ascontiguousarray
ornumpy.asfortranarray
.I guess that we could have a
which would basically
L = layout_type::any
(the default with unspecified ):contiguous<XTENSOR_DEFAULT_LAYOUT>
otherwise.L = layout_type::row_major
:a. pass them through if they have a runtime layout of row_major (they are already row-major-contiguous)
b. return a container otherwise
L = layout_type::column_major
:a. pass them through if they have a runtime layout of column_major (they are already column-major-contiguous)
b. return a container otherwise
The difficulty is with unifying the return type of
a
andb
in both cases.One way to do this is to make it return a
[xarray/xtensor]_adaptor
on a new buffer adaptor type, which would be the same type for owning and non-owning cases, where theowning
would be a runtime attribute set in the constructor.The text was updated successfully, but these errors were encountered: