Looks like `typename` keyword is not required here

[SergeyKopienko]

https://github.com/oneapi-src/oneDPL/blob/a60fa807b1baaad492d86b331548320bf3a15f09/test/support/sycl_sanity.h#L34

template <typename Policy, int idx>
using new_kernel_name = unique_kernel_name<typename ::std::decay_t<Policy>, idx>;