array: use __restrict

src/array.hpp

@@ -14,10 +14,22 @@
 #include <initializer_list>
 #include <stdexcept>
 
+#include <Eigen/Core>
+
 namespace array {
 
 constexpr size_t Dynamic = SIZE_MAX;
 
+#ifdef __GNUC__
+#define ARRAY_RESTRICT __restrict
+#else
+#ifdef EIGEN_RESTRICT
+#define ARRAY_RESTRICT EIGEN_RESTRICT
+#else
+#define ARRAY_RESTRICT
+#endif
+#endif
+
 #ifdef NDEBUG
 constexpr bool bounds_check = false;
 #else
@@ -288,7 +300,7 @@ public:
 protected:
     typedef detail::Base<Shape> Base;
 
-    Scalar *data_;
+    Scalar *ARRAY_RESTRICT data_;
 
     template <size_t axis>
     static constexpr Eigen::Index eigen_shape()