Merge pull request #68 from UB-CSE443/array_type_check

working on making sure arrays and reserve/release are working properly

tests/sprint4/test/sp4_tc_arrays.alpha

@@ -0,0 +1,27 @@
+type string: 1 -> character
+type a_of_s: 1 -> string
+type main: integer -> integer
+function entry: main
+
+(* maybe some other type definitions *)
+
+entry(arg) := {
+    [ string: one_name; string: another_name; a_of_s: many_names ]
+    one_name := "a string literal";
+    another_name := reserve another_name(4); (* reserve space for an an array of character, with 4 members *)
+    another_name(0) := 'C';
+    another_name(1) := 'a';
+    another_name(2) := 'r';
+    another_name(3) := 'l';
+    many_names := reserve many_names(3);
+    many_names(0) := one_name;
+    many_names(1) := another_name;
+    many_names(2) := reserve many_names(2)(6); (* reserve space for an item of the same type as a_of_s(2), an array of character, with 6 members *)
+    many_names(2)(0) := 'P';
+    many_names(2)(1) := 'a';
+    many_names(2)(2) := 'r';
+    many_names(2)(3) := 't';
+    many_names(2)(4) := 'h';
+    many_names(2)(5) := 'o';
+    return 0;
+}