Draft: Templated MD arrays

CMakeLists.txt

@@ -72,6 +72,14 @@ target_compile_features(${POCLIB}
     cxx_std_17
 )
 
+#NOTE this option is done downstream, maybe poc should control it
+set(with_cxx "$<COMPILE_LANGUAGE:CXX>")
+set(ps_kokkos "$<BOOL:${PORTABILITY_STRATEGY_KOKKOS}>")
+
+target_compile_options(${POCLIB}
+INTERFACE
+$<${with_cxx}:$<${ps_kokkos}:--expt-relaxed-constexpr>>)
+
 # TESTING
 # ----------------------------------------
 if(PORTS_OF_CALL_BUILD_TESTING)

ports-of-call/array.hpp

@@ -1,8 +1,22 @@
+// © (or copyright) 2019-2024. Triad National Security, LLC. All rights
+// reserved.  This program was produced under U.S. Government contract
+// 89233218CNA000001 for Los Alamos National Laboratory (LANL), which is
+// operated by Triad National Security, LLC for the U.S.  Department of
+// Energy/National Nuclear Security Administration. All rights in the
+// program are reserved by Triad National Security, LLC, and the
+// U.S. Department of Energy/National Nuclear Security
+// Administration. The Government is granted for itself and others acting
+// on its behalf a nonexclusive, paid-up, irrevocable worldwide license
+// in this material to reproduce, prepare derivative works, distribute
+// copies to the public, perform publicly and display publicly, and to
+// permit others to do so.
+
 #ifndef _PORTS_OF_CALL_ARRAY_HPP_
 #define _PORTS_OF_CALL_ARRAY_HPP_
 
 #include "portability.hpp"
 #include "portable_errors.hpp"
+#include "ports-of-call/utility/array_algo.hpp"
 
 #include <cstddef>
 #include <iterator>
@@ -192,6 +206,12 @@ struct array {
     }
   }
 
+  PORTABLE_FUNCTION constexpr bool operator==(const array &rhs) const {
+    for (size_type i = 0; i < N; ++i)
+      if (arr[i] != rhs.arr[i]) return false;
+    return true;
+  }
+
   //! swap the array contents with another
   PORTABLE_FUNCTION constexpr void swap(array &other) {
     using std::swap;