Fetch host <utility> to populate tuple_size (#336)

* Fetch host `<utility>` to populate `tuple_size` * Add more words to make intent clearer for why the host standard library is necessary. Co-authored-by: Jake Hemstad <[email protected]>
NVIDIA · Dec 1, 2022 · 853bbee · 853bbee
1 parent 3fdea17
commit 853bbee
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Showing 2 changed files with 11 additions and 4 deletions.
diff --git a/include/cuda/std/tuple b/include/cuda/std/tuple
@@ -10,6 +10,12 @@
 #ifndef _CUDA_TUPLE
 #define _CUDA_TUPLE
 
+#if !defined(__CUDACC_RTC__)
+// Fetch utility to get primary template for ::std::tuple_size necessary for the specialization of
+// ::std::tuple_size<cuda::std::tuple> to enable structured bindings. See https://github.com/NVIDIA/libcudacxx/issues/316 
+#include <utility>
+#endif
+
 #include "cstdint"
 #include "climits"
 
@@ -29,5 +35,3 @@
 #include "detail/__pragma_pop"
 
 #endif //_CUDA_TUPLE
-
-
diff --git a/include/cuda/std/utility b/include/cuda/std/utility
@@ -10,6 +10,11 @@
 #ifndef _CUDA_UTILITY
 #define _CUDA_UTILITY
 
+#if !defined(__CUDACC_RTC__)
+// Fetch utility to populate tuple_size
+#include <utility>
+#endif
+
 #include "type_traits"
 #include "version"
 
@@ -23,5 +28,3 @@
 #include "detail/__pragma_pop"
 
 #endif //_CUDA_UTILITY
-
-