(**************************************************************************)
(*     Sail                                                               *)
(*                                                                        *)
(*  Copyright (c) 2013-2017                                               *)
(*    Kathyrn Gray                                                        *)
(*    Shaked Flur                                                         *)
(*    Stephen Kell                                                        *)
(*    Gabriel Kerneis                                                     *)
(*    Robert Norton-Wright                                                *)
(*    Christopher Pulte                                                   *)
(*    Peter Sewell                                                        *)
(*    Alasdair Armstrong                                                  *)
(*    Brian Campbell                                                      *)
(*    Thomas Bauereiss                                                    *)
(*    Anthony Fox                                                         *)
(*    Jon French                                                          *)
(*    Dominic Mulligan                                                    *)
(*    Stephen Kell                                                        *)
(*    Mark Wassell                                                        *)
(*                                                                        *)
(*  All rights reserved.                                                  *)
(*                                                                        *)
(*  This software was developed by the University of Cambridge Computer   *)
(*  Laboratory as part of the Rigorous Engineering of Mainstream Systems  *)
(*  (REMS) project, funded by EPSRC grant EP/K008528/1.                   *)
(*                                                                        *)
(*  Redistribution and use in source and binary forms, with or without    *)
(*  modification, are permitted provided that the following conditions    *)
(*  are met:                                                              *)
(*  1. Redistributions of source code must retain the above copyright     *)
(*     notice, this list of conditions and the following disclaimer.      *)
(*  2. Redistributions in binary form must reproduce the above copyright  *)
(*     notice, this list of conditions and the following disclaimer in    *)
(*     the documentation and/or other materials provided with the         *)
(*     distribution.                                                      *)
(*                                                                        *)
(*  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''    *)
(*  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED     *)
(*  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A       *)
(*  PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR   *)
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(*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      *)
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(*  SUCH DAMAGE.                                                          *)
(**************************************************************************)

open Ast
open Ast_defs
open Type_check

(* Monomorphisation options *)
val opt_mono_rewrites : bool ref
val opt_mono_complex_nexps : bool ref
val opt_mono_split : ((string * int) * string) list ref
val opt_dmono_analysis : int ref
val opt_auto_mono : bool ref
val opt_dall_split_errors : bool ref
val opt_dmono_continue : bool ref

(* Generate a fresh id with the given prefix *)
val fresh_id : string -> l -> id

(* Move loop termination measures into loop AST nodes *)
val move_loop_measures : 'a ast -> 'a ast

(* Re-write undefined to functions created by -undefined_gen flag *)
val rewrite_undefined : bool -> Env.t -> tannot ast -> tannot ast

(* Perform rewrites to create an AST supported for a specific target *)
val rewrite_ast_target : string -> (string * (Env.t -> tannot ast -> tannot ast * Env.t)) list

type rewriter =
  | Basic_rewriter of (Env.t -> tannot ast -> tannot ast)
  | Checking_rewriter of (Env.t -> tannot ast -> tannot ast * Env.t)
  | Bool_rewriter of (bool -> rewriter)
  | String_rewriter of (string -> rewriter)
  | Literal_rewriter of ((lit -> bool) -> rewriter)

val rewrite_lit_ocaml : lit -> bool
val rewrite_lit_lem : lit -> bool

type rewriter_arg =
  | If_mono_arg
  | If_mwords_arg
  | If_flag of bool ref
  | Bool_arg of bool
  | String_arg of string
  | Literal_arg of string

val all_rewrites : (string * rewriter) list

(* Warn about matches where we add a default case for Coq because they're not
   exhaustive *)
val opt_coq_warn_nonexhaustive : bool ref

(* This is a special rewriter pass that checks AST invariants without
   actually doing any re-writing *)
val rewrite_ast_check : (string * (Env.t -> tannot ast -> tannot ast * Env.t)) list

val simple_typ : typ -> typ