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General functions related to OCaml extraction

module Sys

  use int.Int
  use mach.int.Int63

  val constant max_array_length : int63
  axiom non_neg_max_array_length : 0 <= max_array_length

end

module Exceptions

  exception Exit
  exception Not_found
  exception Invalid_argument string

end

module Pervasives

  use int.Int
  use mach.int.Int63

  use export Exceptions

  val succ (x: int63) : int63
    requires { [@expl:integer overflow] in_bounds (to_int x + 1) }
    ensures  { to_int result = to_int x + 1 }

  val pred (x: int63) : int63
    requires { [@expl:integer overflow] in_bounds (to_int x - 1) }
    ensures  { to_int result = to_int x - 1 }

  exception AssertFailure

  val ocaml_assert (_b: bool) : unit
    raises { AssertFailure }

end

module OCaml

  use export int.Int
  use mach.int.Int63 as Int63
  use export int.MinMax
  use export option.Option
  use export Pervasives
  use Sys

  use mach.array.Array63 as Array
  type array 'a = Array.array 'a

  type int63 = Int63.int63

  let function to_int (n: Int63.int63) : int = Int63.to_int n

end

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