Fixes for negative strides

TRIQS / nda

C++ library for multi-dimensional arrays

https://triqs.github.io/nda

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Closed Thoemi09 closed 1 month ago

Thoemi09 commented 2 months ago

Fixes an issue with assigning a scalar to a 1D view with negative strides.
Redefines the functions is_contiguous and is_strided_1d in nda::idx_map to also apply to views with negative strides.
Introduces the function has_positive_strides in nda::idx_map.