Standard Library
Below is the API for the OCaml standard library. It's directly copied over from the OCaml Manual, formatted to the Reason syntax and styled accordingly. The API docs are work-in-progress; we'll be polishing these gradually!
If you're targeting JavaScript, the API docs for BuckleScript includes all of below, plus JS-specific APIs.
sig val zero : int32 val one : int32 val minus_one : int32 external neg : int32 -> int32 = "%int32_neg" external add : int32 -> int32 -> int32 = "%int32_add" external sub : int32 -> int32 -> int32 = "%int32_sub" external mul : int32 -> int32 -> int32 = "%int32_mul" external div : int32 -> int32 -> int32 = "%int32_div" external rem : int32 -> int32 -> int32 = "%int32_mod" val succ : int32 -> int32 val pred : int32 -> int32 val abs : int32 -> int32 val max_int : int32 val min_int : int32 external logand : int32 -> int32 -> int32 = "%int32_and" external logor : int32 -> int32 -> int32 = "%int32_or" external logxor : int32 -> int32 -> int32 = "%int32_xor" val lognot : int32 -> int32 external shift_left : int32 -> int -> int32 = "%int32_lsl" external shift_right : int32 -> int -> int32 = "%int32_asr" external shift_right_logical : int32 -> int -> int32 = "%int32_lsr" external of_int : int -> int32 = "%int32_of_int" external to_int : int32 -> int = "%int32_to_int" external of_float : float -> int32 = "caml_int32_of_float" external to_float : int32 -> float = "caml_int32_to_float" external of_string : string -> int32 = "caml_int32_of_string" val to_string : int32 -> string external bits_of_float : float -> int32 = "caml_int32_bits_of_float" external float_of_bits : int32 -> float = "caml_int32_float_of_bits" type t = int32 val compare : Int32.t -> Int32.t -> int external format : string -> int32 -> string = "caml_int32_format" end