Add basic test of multidimensional array signals

test/regress/array3.vhd

@@ -0,0 +1,27 @@
+entity array3 is
+end entity;
+
+architecture test of array3 is
+    type matrix2x4 is array (1 to 2, 1 to 4) of integer;
+    signal m : matrix2x4;
+begin
+
+    process is
+    begin
+        assert m(2, 2) = integer'left;
+        m(2, 2) <= 5;
+        wait for 1 ns;
+        assert m(2, 2) = 5;
+        m(2, 3) <= m(2, 2);
+        wait for 1 ns;
+        assert m(2, 3) = 5;
+
+        m <= ( (1, 2, 3, 4),
+               (5, 6, 7, 8) );
+        wait for 1 ns;
+        assert m(2, 4) = 8;
+
+        wait;
+    end process;
+
+end architecture;

test/regress/testlist.txt

@@ -170,3 +170,4 @@ elab17          normal
 null2           normal
 func13          normal
 proc10          normal
+array3          normal