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DDC is a C++-17 library that aims to offer to the C++/MPI world an equivalent to the xarray python environment. Where the python version is based on numpy, DDC relies on Kokkos to offer CPU/GPU performance-portable multi-dimensional arrays and iterators.

DDC aims to offer abstractions to represent:

  • tagged continuous dimensions,
  • discretizations of these (multiple kinds of meshes, function spaces, Fourier, etc.),
  • domains in these discretized dimensions,
  • associating data to the elements of these discrete domains,
  • efficient distribution and iteration over this data.

All these abstractions are handled at compilation using C++ template meta-programming to ensure zero overhead at execution and enable developers to change their design choices (eg. from a regular mesh to a non-uniform one) with performance portability.