Adding "require" precondition. Corrects inferred arrays and fixes so that it uses [*] everywhere. Distict type will now allow methods to be added to it. Added $alignof and $sizeof.

test/test_suite/distinct/distinct_struct_array.c3

@@ -14,7 +14,6 @@ define StructArr = distinct Struct2[3];
 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;
 }