lustrec / src / types.ml @ 8f1c7e91
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(* ---------------------------------------------------------------------------- |
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* SchedMCore - A MultiCore Scheduling Framework |
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* Copyright (C) 2009-2011, ONERA, Toulouse, FRANCE - LIFL, Lille, FRANCE |
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* |
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* This file is part of Prelude |
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* |
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* Prelude is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public License |
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* as published by the Free Software Foundation ; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* Prelude is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY ; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this program ; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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*---------------------------------------------------------------------------- *) |
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|
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(** Types definitions and a few utility functions on types. *) |
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open Utils |
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open Dimension |
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|
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type type_expr = |
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{mutable tdesc: type_desc; |
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tid: int} |
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|
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and type_desc = |
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| Tconst of ident (* type constant *) |
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| Tint |
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| Treal |
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| Tbool |
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| Trat (* Actually unused for now. Only place where it can appear is |
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in a clock declaration *) |
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| Tclock of type_expr (* An type expression explicitely tagged as carrying a clock *) |
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| Tarrow of type_expr * type_expr |
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| Ttuple of type_expr list |
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| Tenum of ident list |
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| Tarray of dim_expr * type_expr |
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| Tstatic of dim_expr * type_expr (* a type carried by a dimension expression *) |
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| Tlink of type_expr (* During unification, make links instead of substitutions *) |
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| Tvar (* Monomorphic type variable *) |
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| Tunivar (* Polymorphic type variable *) |
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|
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type error = |
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Unbound_value of ident |
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| Already_bound of ident |
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| Already_defined of ident |
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| Undefined_var of (unit IMap.t) |
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| Unbound_type of ident |
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| Not_a_dimension |
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| Not_a_constant |
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| WrongArity of int * int |
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| Type_clash of type_expr * type_expr |
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| Poly_imported_node of ident |
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|
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exception Unify of type_expr * type_expr |
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exception Error of Location.t * error |
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|
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(* Pretty-print*) |
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open Format |
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|
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let rec print_ty fmt ty = |
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match ty.tdesc with |
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| Tvar -> |
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fprintf fmt "_%s" (name_of_type ty.tid) |
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| Tint -> |
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fprintf fmt "int" |
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| Treal -> |
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fprintf fmt "real" |
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| Tbool -> |
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fprintf fmt "bool" |
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| Tclock t -> |
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fprintf fmt "%a clock" print_ty t |
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| Tstatic (d, t) -> |
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fprintf fmt "(%a:%a)" Dimension.pp_dimension d print_ty t |
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| Tconst t -> |
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fprintf fmt "%s" t |
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| Trat -> |
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fprintf fmt "rat" |
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| Tarrow (ty1,ty2) -> |
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fprintf fmt "%a->%a" print_ty ty1 print_ty ty2 |
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| Ttuple tylist -> |
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fprintf fmt "(%a)" |
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(Utils.fprintf_list ~sep:"*" print_ty) tylist |
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| Tenum taglist -> |
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fprintf fmt "(%a)" |
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(Utils.fprintf_list ~sep:" + " pp_print_string) taglist |
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| Tarray (e, ty) -> |
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fprintf fmt "%a^%a" print_ty ty Dimension.pp_dimension e |
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| Tlink ty -> |
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print_ty fmt ty |
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| Tunivar -> |
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fprintf fmt "'%s" (name_of_type ty.tid) |
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|
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let rec print_node_ty fmt ty = |
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match ty.tdesc with |
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| Tint -> |
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fprintf fmt "int" |
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| Treal -> |
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fprintf fmt "real" |
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| Tbool -> |
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fprintf fmt "bool" |
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| Tclock t -> |
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fprintf fmt "%a clock" print_ty t |
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| Tstatic (_, t) -> |
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fprintf fmt "%a" print_node_ty t |
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| Tconst t -> |
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fprintf fmt "%s" t |
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| Trat -> |
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fprintf fmt "rat" |
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| Tarrow (ty1,ty2) -> |
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fprintf fmt "%a->%a" print_ty ty1 print_ty ty2 |
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| Ttuple tylist -> |
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fprintf fmt "(%a)" |
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(Utils.fprintf_list ~sep:"*" print_ty) tylist |
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| Tenum taglist -> |
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fprintf fmt "(%a)" |
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(Utils.fprintf_list ~sep:" + " pp_print_string) taglist |
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| Tarray (e, ty) -> |
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fprintf fmt "%a^%a" print_ty ty Dimension.pp_dimension e |
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| Tlink ty -> |
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print_ty fmt ty |
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| Tunivar -> |
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fprintf fmt "'%s" (name_of_type ty.tid) |
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| _ -> assert false |
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|
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let pp_error fmt = function |
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| Unbound_value id -> |
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fprintf fmt "Unknown value %s@." id |
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| Unbound_type id -> |
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fprintf fmt "Unknown type %s@." id |
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| Already_bound id -> |
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fprintf fmt "%s is already declared@." id |
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| Already_defined id -> |
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fprintf fmt "Multiple definitions of variable %s@." id |
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| Not_a_constant -> |
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fprintf fmt "This expression is not a constant@." |
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| Not_a_dimension -> |
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fprintf fmt "This expression is not a valid dimension@." |
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| WrongArity (ar1, ar2) -> |
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fprintf fmt "Expecting %d argument(s), found %d@." ar1 ar2 |
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| Undefined_var vmap -> |
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fprintf fmt "No definition provided for variable(s): %a@." |
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(Utils.fprintf_list ~sep:"," pp_print_string) |
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(fst (Utils.list_of_imap vmap)) |
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| Type_clash (ty1,ty2) -> |
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Utils.reset_names (); |
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fprintf fmt "Expected type %a, got type %a@." print_ty ty1 print_ty ty2 |
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| Poly_imported_node id -> |
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fprintf fmt "Imported nodes cannot have a polymorphic type@." |
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|
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|
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let new_id = ref (-1) |
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|
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let new_ty desc = |
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incr new_id; {tdesc = desc; tid = !new_id } |
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|
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let new_var () = |
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new_ty Tvar |
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|
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let new_univar () = |
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new_ty Tunivar |
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|
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let rec repr = |
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function |
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{tdesc = Tlink t'} -> |
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repr t' |
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| t -> t |
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|
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let get_static_value ty = |
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match (repr ty).tdesc with |
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| Tstatic (d, _) -> Some d |
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| _ -> None |
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|
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let is_clock_type ty = |
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match (repr ty).tdesc with |
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| Tclock _ -> true |
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| _ -> false |
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|
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let rec is_dimension_type ty = |
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match (repr ty).tdesc with |
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| Tint |
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| Tbool -> true |
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| Tclock ty' |
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| Tstatic (_, ty') -> is_dimension_type ty' |
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| _ -> false |
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|
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let rec dynamic_type ty = |
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let ty = repr ty in |
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match ty.tdesc with |
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| Tstatic (_, ty') -> ty' |
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| _ -> ty |
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|
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let map_tuple_type f ty = |
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let ty = dynamic_type ty in |
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match ty.tdesc with |
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| (Ttuple ty_list) -> { ty with tdesc = Ttuple (List.map f ty_list) } |
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| _ -> f ty |
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let rec is_array_type ty = |
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match (repr ty).tdesc with |
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| Tarray _ -> true |
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| Tstatic (_, ty') -> is_array_type ty' |
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| _ -> false |
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|
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let array_type_dimension ty = |
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match (dynamic_type ty).tdesc with |
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| Tarray (d, _) -> d |
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| _ -> assert false |
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|
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let rec array_type_multi_dimension ty = |
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match (dynamic_type ty).tdesc with |
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| Tarray (d, ty') -> d :: array_type_multi_dimension ty' |
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| _ -> [] |
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|
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let array_element_type ty = |
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match (dynamic_type ty).tdesc with |
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| Tarray (_, ty') -> ty' |
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| _ -> assert false |
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|
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let rec array_base_type ty = |
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let ty = repr ty in |
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match ty.tdesc with |
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| Tarray (_, ty') |
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| Tstatic (_, ty') -> array_base_type ty' |
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| _ -> ty |
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|
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let rec is_generic_type ty = |
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match (dynamic_type ty).tdesc with |
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| Tarray (d, ty') -> |
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(not (Dimension.is_dimension_const d)) || (is_generic_type ty') |
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| _ -> false |
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|
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(** Splits [ty] into the [lhs,rhs] of an arrow type. Expects an arrow type |
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(ensured by language syntax) *) |
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let rec split_arrow ty = |
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match (repr ty).tdesc with |
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| Tarrow (tin,tout) -> tin,tout |
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| Tstatic (_, ty') -> split_arrow ty' |
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(* Functions are not first order, I don't think the var case |
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needs to be considered here *) |
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| _ -> Format.eprintf "%a@." print_ty ty; assert false |
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|
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(** Returns the type corresponding to a type list. *) |
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let type_of_type_list tyl = |
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if (List.length tyl) > 1 then |
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new_ty (Ttuple tyl) |
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else |
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List.hd tyl |
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|
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let type_list_of_type ty = |
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match (repr ty).tdesc with |
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| Ttuple tl -> tl |
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| _ -> [ty] |
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|
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(** [is_polymorphic ty] returns true if [ty] is polymorphic. *) |
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let rec is_polymorphic ty = |
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match ty.tdesc with |
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| Tenum _ | Tvar | Tint | Treal | Tbool | Trat | Tconst _ -> false |
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| Tclock ty -> is_polymorphic ty |
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| Tarrow (ty1,ty2) -> (is_polymorphic ty1) || (is_polymorphic ty2) |
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| Ttuple tl -> List.exists (fun t -> is_polymorphic t) tl |
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| Tlink t' -> is_polymorphic t' |
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| Tarray (d, ty) |
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| Tstatic (d, ty) -> Dimension.is_polymorphic d || is_polymorphic ty |
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| Tunivar -> true |
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|
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|
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let mktyptuple nb typ = |
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let array = Array.make nb typ in |
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Ttuple (Array.to_list array) |
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|
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|
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(* Local Variables: *) |
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(* compile-command:"make -C .." *) |
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(* End: *) |