Remove integer_sequence backward compatibility implementation

[dhollman]

They're in namespace Impl and they're only used in the tests that test if they work.

Removing

• integer_sequence
• make_integer_sequence_concat
• index_sequence
• make_index_sequence
• integer_sequence_at
• at
• reverse_integer_sequence
• exclusive_scan_integer_sequence
• inclusive_scan_integer_sequence

[dalg24]

Fine by me if it passes CI

[dhollman]

@dalg24 we can actually just pull all of our integer_sequence implementation out.

[dalg24]

Didn't find any match in Kokkos-Kernels nor Trilinos

One of the CUDA builds failed on Jenkins

[dhollman]

This is an issue with how EDG handles alias templates with respect to function template matching. I've run in to this before and I'll fix it as soon as I'm in front of my machine again.

[masterleinad]

Looks good to me.

[dalg24]

Retest this please

[masterleinad]

/var/jenkins/workspace/Kokkos/core/src/impl/KokkosExp_IterateTileGPU.hpp(84): error: integer_sequence is not a template

should be easy to fix after rebasing.

[masterleinad]

diff --git a/core/src/impl/KokkosExp_IterateTileGPU.hpp b/core/src/impl/KokkosExp_IterateTileGPU.hpp
index 5ca1f245e..688afcc10 100644
--- a/core/src/impl/KokkosExp_IterateTileGPU.hpp
+++ b/core/src/impl/KokkosExp_IterateTileGPU.hpp
@@ -81,7 +81,7 @@ _tag_invoke(Functor const& f, Args&&... args) {
 template <class Tag, class Functor, class T, size_t N, size_t... Idxs,
           class... Args>
 KOKKOS_IMPL_FORCEINLINE_FUNCTION void _tag_invoke_array_helper(
-    Functor const& f, T (&vals)[N], integer_sequence<size_t, Idxs...>,
+    Functor const& f, T (&vals)[N], std::integer_sequence<size_t, Idxs...>,
     Args&&... args) {
   _tag_invoke<Tag>(f, vals[Idxs]..., (Args &&) args...);
 }
@@ -90,7 +90,7 @@ template <class Tag, class Functor, class T, size_t N, class... Args>
 KOKKOS_IMPL_FORCEINLINE_FUNCTION void _tag_invoke_array(Functor const& f,
                                                         T (&vals)[N],
                                                         Args&&... args) {
-  _tag_invoke_array_helper<Tag>(f, vals, make_index_sequence<N>{},
+  _tag_invoke_array_helper<Tag>(f, vals, std::make_index_sequence<N>{},
                                 (Args &&) args...);
 }

fixes this.

[dalg24]

Retest this please

[masterleinad]

The failing SYCL CI is fixed by #3741.