let caml_hexstring_of_float: float => int => char => string;
let caml_float_of_string: string => float;
let caml_int_of_string: string => int;
let caml_int32_of_string: string => int;
let caml_int64_of_string: string => int64;
let caml_nativeint_of_string: string => int;