+#define assert(expr) ASSERTV(expr, "")
+#define ASSERT(expr) ASSERTV(expr, "")
+#define ASSERTR(expr,rv) ASSERTRV(expr, rv, "")
+#define ASSERTC(l,rel,r) ASSERTV(l rel r, ": %i"#rel"%i", l, r)
+#define ASSERTCR(l,rel,r,rv) ASSERTRV(l rel r, rv, ": %i"#rel"%i", l, r)