From 134310e09a184149b8933642b45f21ac12a01303 Mon Sep 17 00:00:00 2001
From: Thomas Padioleau <thomas.padioleau@cea.fr>
Date: Thu, 29 Feb 2024 22:41:11 +0100
Subject: [PATCH] Add layout constraint

---
 include/ddc/mirror.hpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/ddc/mirror.hpp b/include/ddc/mirror.hpp
index 801b712a7..99fd2f1ab 100644
--- a/include/ddc/mirror.hpp
+++ b/include/ddc/mirror.hpp
@@ -17,6 +17,9 @@ auto create_mirror(
         [[maybe_unused]] Space const& space,
         ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     return Chunk(
             src.domain(),
             KokkosAllocator<std::remove_const_t<ElementType>, typename Space::memory_space>());
@@ -26,6 +29,9 @@ auto create_mirror(
 template <class ElementType, class Support, class Layout, class MemorySpace>
 auto create_mirror(ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     return Chunk(src.domain(), HostAllocator<std::remove_const_t<ElementType>>());
 }
 
@@ -35,6 +41,9 @@ auto create_mirror_and_copy(
         Space const& space,
         ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     Chunk chunk = create_mirror(space, src);
     parallel_deepcopy(space, chunk, src);
     return chunk;
@@ -44,6 +53,9 @@ auto create_mirror_and_copy(
 template <class ElementType, class Support, class Layout, class MemorySpace>
 auto create_mirror_and_copy(ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     Chunk chunk = create_mirror(src);
     parallel_deepcopy(chunk, src);
     return chunk;
@@ -56,6 +68,9 @@ auto create_mirror_view(
         Space const& space,
         ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     if constexpr (Kokkos::SpaceAccessibility<Space, MemorySpace>::accessible) {
         return src;
     } else {
@@ -68,6 +83,9 @@ auto create_mirror_view(
 template <class ElementType, class Support, class Layout, class MemorySpace>
 auto create_mirror_view(ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     if constexpr (Kokkos::SpaceAccessibility<Kokkos::HostSpace, MemorySpace>::accessible) {
         return src;
     } else {
@@ -82,6 +100,9 @@ auto create_mirror_view_and_copy(
         Space const& space,
         ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     if constexpr (Kokkos::SpaceAccessibility<Space, MemorySpace>::accessible) {
         return src;
     } else {
@@ -94,6 +115,9 @@ auto create_mirror_view_and_copy(
 template <class ElementType, class Support, class Layout, class MemorySpace>
 auto create_mirror_view_and_copy(ChunkSpan<ElementType, Support, Layout, MemorySpace> const& src)
 {
+    static_assert(
+            std::is_same_v<Layout, std::experimental::layout_right>,
+            "Only layout right is supported");
     if constexpr (Kokkos::SpaceAccessibility<Kokkos::HostSpace, MemorySpace>::accessible) {
         return src;
     } else {