darray: add equality operators

array/darray.hpp

@@ -138,4 +138,35 @@ namespace cruft {
 
         std::size_t m_size;
     };
+
+
+    //-------------------------------------------------------------------------
+    template <
+        std::size_t SizeA, typename ValueA,
+        std::size_t SizeB, typename ValueB
+    >
+    constexpr auto
+    operator== (
+        darray<SizeA,ValueA> const &a,
+        darray<SizeB,ValueB> const &b
+    ) {
+        return std::equal (
+            a.begin (), a.end (),
+            b.begin (), b.end ()
+        );
+    }
+
+
+    //-------------------------------------------------------------------------
+    template <
+        std::size_t SizeA, typename ValueA,
+        std::size_t SizeB, typename ValueB
+    >
+    constexpr auto
+    operator!= (
+        darray<SizeA,ValueA> const &a,
+        darray<SizeB,ValueB> const &b
+    ) {
+        return !(a == b);
+    }
 }