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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
open Compat
open Names
open Pcoq
open Genarg
open Vernacexpr
(** Making generic actions in type generic_argument *)
let make_generic_action
(f:Loc.t -> ('b * raw_generic_argument) list -> 'a) pil =
let rec make env = function
| [] ->
Gram.action (fun loc -> f (to_coqloc loc) env)
| None :: tl -> (* parse a non-binding item *)
Gram.action (fun _ -> make env tl)
| Some (p, t) :: tl -> (* non-terminal *)
Gram.action (fun v -> make ((p, Unsafe.inj t v) :: env) tl) in
make [] (List.rev pil)
(** Grammar extensions declared at ML level *)
type grammar_prod_item =
| GramTerminal of string
| GramNonTerminal of
Loc.t * argument_type * prod_entry_key * Id.t option
let make_prod_item = function
| GramTerminal s -> (gram_token_of_string s, None)
| GramNonTerminal (_,t,e,po) ->
(symbol_of_prod_entry_key e, Option.map (fun p -> (p,t)) po)
let make_rule mkact pt =
let (symbs,ntl) = List.split (List.map make_prod_item pt) in
let act = make_generic_action mkact ntl in
(symbs, act)
(** Vernac grammar extensions *)
let vernac_exts = ref []
let get_extend_vernac_rule (s, i) =
try
let find ((name, j), _) = String.equal name s && Int.equal i j in
let (_, rules) = List.find find !vernac_exts in
rules
with
| Failure _ -> raise Not_found
let extend_vernac_command_grammar s nt gl =
let nt = Option.default Vernac_.command nt in
vernac_exts := (s,gl) :: !vernac_exts;
let mkact loc l = VernacExtend (s,List.map snd l) in
let rules = [make_rule mkact gl] in
maybe_uncurry (Gram.extend nt) (None,[(None, None, List.rev rules)])
|
