--- /dev/null
+(* Copyright (C) 2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+(** CIC Notation Parse Tree *)
+
+type binder_kind = [ `Lambda | `Pi | `Exists | `Forall ]
+type induction_kind = [ `Inductive | `CoInductive ]
+type sort_kind = [ `Prop | `Set | `Type of CicUniv.universe | `CProp ]
+type fold_kind = [ `Left | `Right ]
+
+type location = Stdpp.location
+let fail floc msg =
+ let (x, y) = HExtlib.loc_of_floc floc in
+ failwith (Printf.sprintf "Error at characters %d - %d: %s" x y msg)
+
+type href = UriManager.uri
+
+type child_pos = [ `Left | `Right | `Inner ]
+
+type term_attribute =
+ [ `Loc of location (* source file location *)
+ | `IdRef of string (* ACic pointer *)
+ | `Level of int * Gramext.g_assoc (* precedence, associativity *)
+ | `ChildPos of child_pos (* position of l1 pattern variables *)
+ | `XmlAttrs of (string option * string * string) list
+ (* list of XML attributes: namespace, name, value *)
+ | `Raw of string (* unparsed version *)
+ ]
+
+type literal =
+ [ `Symbol of string
+ | `Keyword of string
+ | `Number of string
+ ]
+
+type case_indtype = string * href option
+
+type 'term capture_variable = 'term * 'term option
+
+(** To be increased each time the term type below changes, used for "safe"
+ * marshalling *)
+let magic = 2
+
+type term =
+ (* CIC AST *)
+
+ | AttributedTerm of term_attribute * term
+
+ | Appl of term list
+ | Binder of binder_kind * term capture_variable * term (* kind, name, body *)
+ | Case of term * case_indtype option * term option *
+ (case_pattern * term) list
+ (* what to match, inductive type, out type, <pattern,action> list *)
+ | Cast of term * term
+ | LetIn of term capture_variable * term * term (* name, body, where *)
+ | LetRec of induction_kind * (term capture_variable list * term capture_variable * term * int) list * term
+ (* (params, name, body, decreasing arg) list, where *)
+ | Ident of string * subst list option
+ (* literal, substitutions.
+ * Some [] -> user has given an empty explicit substitution list
+ * None -> user has given no explicit substitution list *)
+ | Implicit
+ | Meta of int * meta_subst list
+ | Num of string * int (* literal, instance *)
+ | Sort of sort_kind
+ | Symbol of string * int (* canonical name, instance *)
+
+ | UserInput (* place holder for user input, used by MatitaConsole, not to be
+ used elsewhere *)
+ | Uri of string * subst list option (* as Ident, for long names *)
+
+ (* Syntax pattern extensions *)
+
+ | Literal of literal
+ | Layout of layout_pattern
+
+ | Magic of magic_term
+ | Variable of pattern_variable
+
+ (* name, type. First component must be Ident or Variable (FreshVar _) *)
+
+and meta_subst = term option
+and subst = string * term
+and case_pattern =
+ Pattern of string * href option * term capture_variable list
+ | Wildcard
+
+and box_kind = H | V | HV | HOV
+and box_spec = box_kind * bool * bool (* kind, spacing, indent *)
+
+and layout_pattern =
+ | Sub of term * term
+ | Sup of term * term
+ | Below of term * term
+ | Above of term * term
+ | Frac of term * term
+ | Over of term * term
+ | Atop of term * term
+(* | array of term * literal option * literal option
+ |+ column separator, row separator +| *)
+ | Sqrt of term
+ | Root of term * term (* argument, index *)
+ | Break
+ | Box of box_spec * term list
+ | Group of term list
+
+and magic_term =
+ (* level 1 magics *)
+ | List0 of term * literal option (* pattern, separator *)
+ | List1 of term * literal option (* pattern, separator *)
+ | Opt of term
+
+ (* level 2 magics *)
+ | Fold of fold_kind * term * string list * term
+ (* base case pattern, recursive case bound names, recursive case pattern *)
+ | Default of term * term (* "some" case pattern, "none" case pattern *)
+ | Fail
+ | If of term * term * term (* test, pattern if true, pattern if false *)
+
+and pattern_variable =
+ (* level 1 and 2 variables *)
+ | NumVar of string
+ | IdentVar of string
+ | TermVar of string
+
+ (* level 1 variables *)
+ | Ascription of term * string
+
+ (* level 2 variables *)
+ | FreshVar of string
+
+type argument_pattern =
+ | IdentArg of int * string (* eta-depth, name *)
+
+type cic_appl_pattern =
+ | UriPattern of UriManager.uri
+ | VarPattern of string
+ | ImplicitPattern
+ | ApplPattern of cic_appl_pattern list
+
+ (** <name, inductive/coinductive, type, constructor list>
+ * true means inductive, false coinductive *)
+type 'term inductive_type = string * bool * 'term * (string * 'term) list
+
+type 'term obj =
+ | Inductive of 'term capture_variable list * 'term inductive_type list
+ (** parameters, list of loc * mutual inductive types *)
+ | Theorem of Cic.object_flavour * string * 'term * 'term option
+ (** flavour, name, type, body
+ * - name is absent when an unnamed theorem is being proved, tipically in
+ * interactive usage
+ * - body is present when its given along with the command, otherwise it
+ * will be given in proof editing mode using the tactical language,
+ * unless the flavour is an Axiom
+ *)
+ | Record of 'term capture_variable list * string * 'term * (string * 'term * bool * int) list
+ (** left parameters, name, type, fields *)
+
+(** {2 Standard precedences} *)
+
+let let_in_prec = 10
+let binder_prec = 20
+let apply_prec = 70
+let simple_prec = 90
+
+let let_in_assoc = Gramext.NonA
+let binder_assoc = Gramext.RightA
+let apply_assoc = Gramext.LeftA
+let simple_assoc = Gramext.NonA
+
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