There are several efforts including VexCL [0] expression templates, OpenACC [1] preprocessor, Kokkos [2] template metaprogramming, SYCL [3], and many other similar projects. Parallel programming for non-trivial parallelism is still...non-trivial.

[0] https://github.com/ddemidov/vexcl

[1] https://www.openacc.org/

[2] https://github.com/kokkos/kokkos

[3] https://www.khronos.org/sycl