CristalCaveGem » LustreC

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(*                                                                  *)

(*  The LustreC compiler toolset   /  The LustreC Development Team  *)

(*  Copyright 2012 -    --   ONERA - CNRS - INPT                    *)

(*                                                                  *)

(*  LustreC is free software, distributed WITHOUT ANY WARRANTY      *)

(*  under the terms of the GNU Lesser General Public License        *)

(*  version 2.1.                                                    *)

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open Utils

open Corelang

open LustreSpec

open Format

let rec tuple_split_expr expr = 

  match expr.expr_desc with

  | Expr_const _ 

  | Expr_ident _ -> [expr]

  | Expr_tuple elist -> elist

  | Expr_appl (id, args, r) ->

    if Basic_library.is_homomorphic_fun id 

    then

      let args_list = List.map tuple_split_expr (expr_list_of_expr args) in

      List.map

	(fun arg -> {expr with expr_tag = Utils.new_tag (); expr_desc = Expr_appl (id, expr_of_expr_list args.expr_loc arg, r) })

	(transpose_list args_list)

    else

      [expr]

  | Expr_array el ->

    let args_list = List.map tuple_split_expr el in

    List.map

      (fun arg -> {expr with expr_tag = Utils.new_tag (); expr_desc = Expr_array arg })

      (transpose_list args_list)

  | Expr_access (e1, d) ->

    List.map

      (fun e1 -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_access (e1, d) })

      (tuple_split_expr e1)

 | Expr_power (e1, d) ->

    List.map

      (fun e1 -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_power (e1, d) })

      (tuple_split_expr e1)

  | Expr_arrow (e1,e2) -> 

    List.map2

      (fun e1 e2 -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_arrow (e1, e2) })

      (tuple_split_expr e1)

      (tuple_split_expr e2)

  | Expr_pre e ->

    List.map

      (fun e -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_pre e })

      (tuple_split_expr e)

  | Expr_fby (v, e) ->

    List.map

      (fun e -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_fby (v, e) })

      (tuple_split_expr e)

  | Expr_when (e, c, l) ->

    List.map

      (fun e -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_when (e, c, l) })

      (tuple_split_expr e)

  | Expr_ite (c, t, e) ->

    List.map2

      (fun t e -> { expr with expr_tag = Utils.new_tag (); expr_desc = Expr_ite (c, t, e) })

      (tuple_split_expr t)

      (tuple_split_expr e)

  | Expr_merge (c,hl) ->

    let tl, hl = List.split (List.map (fun (t, h) -> (t, tuple_split_expr h)) hl) in

    List.map

      (fun hl -> {expr with expr_tag = Utils.new_tag (); expr_desc = Expr_merge (c, List.combine tl hl) })

      (transpose_list hl)

let rec tuple_split_eq eq =

  let split_rhs = tuple_split_expr eq.eq_rhs in

  if List.length split_rhs = 1

  then

    [eq]

  else

    List.map2

      (fun lhs rhs -> mkeq eq.eq_loc ([lhs], rhs))

      eq.eq_lhs

      split_rhs

let tuple_split_eq_list eqs =

 List.fold_right (fun eq -> (@) (tuple_split_eq eq)) eqs []

(* Local Variables: *)

(* compile-command:"make -C .." *)

(* End: *)