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(********************************************************************)
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(* *)
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(* The LustreC compiler toolset / The LustreC Development Team *)
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(* Copyright 2012 - -- ONERA - CNRS - INPT *)
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(* *)
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(* LustreC is free software, distributed WITHOUT ANY WARRANTY *)
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(* under the terms of the GNU Lesser General Public License *)
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(* version 2.1. *)
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(* *)
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(********************************************************************)
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open LustreSpec
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open Corelang
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type error =
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| Stateful_kwd of ident
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| Stateful_imp of ident
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exception Error of Location.t * error
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let rec check_expr expr =
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match expr.expr_desc with
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| Expr_const _
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| Expr_ident _ -> true
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| Expr_tuple el
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| Expr_array el -> List.for_all check_expr el
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| Expr_access (e1, _)
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| Expr_power (e1, _) -> check_expr e1
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| Expr_ite (c, t, e) -> check_expr c && check_expr t && check_expr e
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| Expr_arrow _
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| Expr_fby _
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| Expr_pre _ -> false
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| Expr_when (e', i, l)-> check_expr e'
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| Expr_merge (i, hl) -> List.for_all (fun (t, h) -> check_expr h) hl
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| Expr_appl (i, e', i') ->
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check_expr e' &&
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(Basic_library.is_internal_fun i || check_node (node_from_name i))
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and compute_node nd =
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List.for_all (fun eq -> check_expr eq.eq_rhs) (get_node_eqs nd)
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and check_node td =
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match td.top_decl_desc with
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| Node nd -> (
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match nd.node_stateless with
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| None ->
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begin
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let stateless = compute_node nd in
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nd.node_stateless <- Some stateless;
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if nd.node_dec_stateless && (not stateless)
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then raise (Error (td.top_decl_loc, Stateful_kwd nd.node_id))
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else (nd.node_dec_stateless <- stateless; stateless)
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end
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| Some stl -> stl)
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| ImportedNode nd -> nd.nodei_stateless
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| _ -> true
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let check_prog decls =
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List.iter (fun td -> ignore (check_node td)) decls
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let check_compat_decl decl =
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match decl.top_decl_desc with
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| ImportedNode nd ->
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let td = Corelang.node_from_name nd.nodei_id in
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(match td.top_decl_desc with
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| Node nd' -> let stateless = check_node td in
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if nd.nodei_stateless && (not stateless)
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then raise (Error (td.top_decl_loc, Stateful_imp nd.nodei_id))
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else nd'.node_dec_stateless <- nd.nodei_stateless
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| _ -> assert false)
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| Node _ -> assert false
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| _ -> ()
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let check_compat header =
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List.iter check_compat_decl header
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let pp_error fmt err =
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match err with
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| Stateful_kwd nd ->
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Format.fprintf fmt
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"node %s should be stateless but is actually stateful.@."
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nd
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| Stateful_imp nd ->
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Format.fprintf fmt
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"node %s is declared stateless but is actually stateful.@."
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nd
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(* Local Variables: *)
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(* compile-command:"make -C .." *)
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(* End: *)
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