Added "distinct" types.

test/test_suite/distinct/distinct_struct_array.c3

@@ -0,0 +1,20 @@
+module test;
+
+typedef int as distinct Foo;
+
+struct Struct
+{
+    Foo x;
+    int y;
+}
+
+typedef Struct as distinct Struct2;
+typedef Struct2[3] as distinct StructArr;
+
+func void test(int x)
+{
+    StructArr z = { { .x = 1 }, { .y = x }, { 1, 2 }};
+    usize xr = z.sizeof;
+    usize len = z.len;
+    Foo zz = z[2].x;
+}