giles
1b38f89055
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Replaces the stub sprintf in runtime.sx with a real implementation: walk fmt char-by-char accumulating a prefix; on recognised %X return a one-arg fn that formats the arg and recurses on the rest of fmt. The function self-curries to the spec count — there's no separate arity machinery, just a closure chain. Specs: %d (int), %s (string), %f (float), %c (char/string in our model), %b (bool), %% (literal). Unknown specs pass through. Same expression returns a string (no specs) or a function (>=1 spec) — OCaml proper would reject this; works fine in OCaml-on-SX's dynamic runtime. Also adds top-level aliases: string_of_int = _string_of_int string_of_float = _string_of_float string_of_bool = if b then "true" else "false" int_of_string = _int_of_string Printf.sprintf "x=%d" 42 = "x=42" Printf.sprintf "%s = %d" "answer" 42 = "answer = 42" Printf.sprintf "%d%%" 50 = "50%"