DDC, a Performance Portable Library Abstracting Computation on Discrete Domains

The Discrete Domain Computation (DDC) library is a modern C++ library that aims to offer to the C++ world an equivalent to the xarray.DataArray Python environment. The Xarray library introduces labeled multidimensional arrays, enabling more intuitive data manipulation by associating dimensions with user-provided names rather than relying on positional indexing. This approach simplifies indexing, slicing, and broadcasting while reducing common indexing errors. Inspired by these ideas, DDC extends the Kokkos library by providing zero-overhead dimension labeling for multidimensional arrays along with performance-portable multidimensional algorithms. This labeling mechanism enables compile-time detection of indexing and slicing errors, ensuring safer and more expressive array operations in C++. In this presentation, we will introduce the core concepts of DDC and demonstrate its usage through a simple example that highlights some of its key features.