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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id$ *)
open Util
open Pp
open Names
open Libnames
open Topconstr
open Libobject
open Lib
open Nameops
open Nametab
(* Syntactic definitions. *)
let syntax_table = ref (KNmap.empty : interpretation KNmap.t)
let _ = Summary.declare_summary
"SYNTAXCONSTANT"
{ Summary.freeze_function = (fun () -> !syntax_table);
Summary.unfreeze_function = (fun ft -> syntax_table := ft);
Summary.init_function = (fun () -> syntax_table := KNmap.empty) }
let add_syntax_constant kn c =
syntax_table := KNmap.add kn c !syntax_table
let load_syntax_constant i ((sp,kn),(local,pat,onlyparse)) =
if Nametab.exists_cci sp then
errorlabstrm "cache_syntax_constant"
(pr_id (basename sp) ++ str " already exists");
add_syntax_constant kn pat;
Nametab.push_syndef (Nametab.Until i) sp kn
let is_alias_of_already_visible_name sp = function
| _,ARef ref ->
let (dir,id) = repr_qualid (shortest_qualid_of_global Idset.empty ref) in
dir = empty_dirpath && id = basename sp
| _ ->
false
let open_syntax_constant i ((sp,kn),(_,pat,onlyparse)) =
if not (is_alias_of_already_visible_name sp pat) then begin
Nametab.push_syndef (Nametab.Exactly i) sp kn;
if not onlyparse then
(* Redeclare it to be used as (short) name in case an other (distfix)
notation was declared inbetween *)
Notation.declare_uninterpretation (Notation.SynDefRule kn) pat
end
let cache_syntax_constant d =
load_syntax_constant 1 d;
open_syntax_constant 1 d
let subst_syntax_constant (subst,(local,pat,onlyparse)) =
(local,subst_interpretation subst pat,onlyparse)
let classify_syntax_constant (local,_,_ as o) =
if local then Dispose else Substitute o
let (in_syntax_constant, out_syntax_constant) =
declare_object {(default_object "SYNTAXCONSTANT") with
cache_function = cache_syntax_constant;
load_function = load_syntax_constant;
open_function = open_syntax_constant;
subst_function = subst_syntax_constant;
classify_function = classify_syntax_constant }
type syndef_interpretation = (identifier * subscopes) list * aconstr
(* Coercions to the general format of notation that also supports
variables bound to list of expressions *)
let in_pat (ids,ac) = ((ids,[]),ac)
let out_pat ((ids,idsl),ac) = assert (idsl=[]); (ids,ac)
let declare_syntactic_definition local id onlyparse pat =
let _ = add_leaf id (in_syntax_constant (local,in_pat pat,onlyparse)) in ()
let search_syntactic_definition kn =
out_pat (KNmap.find kn !syntax_table)
|
