change check to edg

It's not entirely nvcc's fault, edg is broken for the pack expansion
thing, but the host-device default stuff, that's nvcc's fault.  Might be
able to fix in 10+.

Author: trws

include/camp/tuple.hpp

@@ -87,9 +87,10 @@ namespace internal
 {
   template <camp::idx_t index, typename Type>
   struct tuple_storage {
-#if defined(__NVCC__)
-    // NVCC up until at least 10.1 can't do aggregate initialization of a pack
-    // of base classes, keep this around until that's fixed
+#if defined(__EDG__)
+    // EDG apparently can't do aggregate initialization of a pack
+    // of base classes, keep this around until that's fixed, seen in icpc 19.0.4
+    // and nvcc 10.1
     CAMP_HOST_DEVICE constexpr tuple_storage() : val(){};
 
     CAMP_SUPPRESS_HD_WARN
@@ -117,8 +118,8 @@ namespace internal
     constexpr tuple_helper() = default;
     constexpr tuple_helper(tuple_helper const&) = default;
     constexpr tuple_helper(tuple_helper&&) = default;
+  #else
 
-#else
     // NOTE: this is to work around nvcc 9 series issues with incorrect
     // creation of defaulted constructors
     template <
@@ -140,11 +141,21 @@ namespace internal
     }
 #endif
 
+#if !defined(__EDG__)
     template <typename... Args>
     CAMP_HOST_DEVICE constexpr tuple_helper(Args&&... args)
         : tuple_storage<Indices, Types>{std::forward<Args>(args)}...
     {
     }
+#else
+
+    template <typename... Args>
+    CAMP_HOST_DEVICE constexpr tuple_helper(Args&&... args)
+        : tuple_storage<Indices, Types>(std::forward<Args>(args))...
+    {
+    }
+#endif
+
 
     tuple_helper& operator=(const tuple_helper& rhs) = default;