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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 *)
(************************************************************************)
(*i camlp4use: "pa_extend.cmo" i*)
(* $Id: g_ltac.ml4 11576 2008-11-10 19:13:15Z msozeau $ *)
open Pp
open Util
open Topconstr
open Rawterm
open Tacexpr
open Vernacexpr
open Pcoq
open Prim
open Tactic
let fail_default_value = ArgArg 0
let arg_of_expr = function
TacArg a -> a
| e -> Tacexp (e:raw_tactic_expr)
(* Tactics grammar rules *)
GEXTEND Gram
GLOBAL: tactic Vernac_.command tactic_expr binder_tactic tactic_arg
constr_may_eval;
tactic_then_last:
[ [ "|"; lta = LIST0 OPT tactic_expr SEP "|" ->
Array.map (function None -> TacId [] | Some t -> t) (Array.of_list lta)
| -> [||]
] ]
;
tactic_then_gen:
[ [ ta = tactic_expr; "|"; (first,last) = tactic_then_gen -> (ta::first, last)
| ta = tactic_expr; ".."; l = tactic_then_last -> ([], Some (ta, l))
| ".."; l = tactic_then_last -> ([], Some (TacId [], l))
| ta = tactic_expr -> ([ta], None)
| "|"; (first,last) = tactic_then_gen -> (TacId [] :: first, last)
| -> ([TacId []], None)
] ]
;
tactic_expr:
[ "5" RIGHTA
[ te = binder_tactic -> te ]
| "4" LEFTA
[ ta0 = tactic_expr; ";"; ta1 = binder_tactic -> TacThen (ta0, [||], ta1, [||])
| ta0 = tactic_expr; ";"; ta1 = tactic_expr -> TacThen (ta0, [||], ta1, [||])
| ta0 = tactic_expr; ";"; "["; (first,tail) = tactic_then_gen; "]" ->
match tail with
| Some (t,last) -> TacThen (ta0, Array.of_list first, t, last)
| None -> TacThens (ta0,first) ]
| "3" RIGHTA
[ IDENT "try"; ta = tactic_expr -> TacTry ta
| IDENT "do"; n = int_or_var; ta = tactic_expr -> TacDo (n,ta)
| IDENT "repeat"; ta = tactic_expr -> TacRepeat ta
| IDENT "progress"; ta = tactic_expr -> TacProgress ta
(*To do: put Abstract in Refiner*)
| IDENT "abstract"; tc = NEXT -> TacAbstract (tc,None)
| IDENT "abstract"; tc = NEXT; "using"; s = ident ->
TacAbstract (tc,Some s) ]
(*End of To do*)
| "2" RIGHTA
[ ta0 = tactic_expr; "||"; ta1 = binder_tactic -> TacOrelse (ta0,ta1)
| ta0 = tactic_expr; "||"; ta1 = tactic_expr -> TacOrelse (ta0,ta1) ]
| "1" RIGHTA
[ b = match_key; IDENT "goal"; "with"; mrl = match_context_list; "end" ->
TacMatchGoal (b,false,mrl)
| b = match_key; IDENT "reverse"; IDENT "goal"; "with";
mrl = match_context_list; "end" ->
TacMatchGoal (b,true,mrl)
| b = match_key; c = tactic_expr; "with"; mrl = match_list; "end" ->
TacMatch (b,c,mrl)
| IDENT "first" ; "["; l = LIST0 tactic_expr SEP "|"; "]" ->
TacFirst l
| IDENT "solve" ; "["; l = LIST0 tactic_expr SEP "|"; "]" ->
TacSolve l
| IDENT "complete" ; ta = tactic_expr -> TacComplete ta
| IDENT "idtac"; l = LIST0 message_token -> TacId l
| IDENT "fail"; n = [ n = int_or_var -> n | -> fail_default_value ];
l = LIST0 message_token -> TacFail (n,l)
| IDENT "external"; com = STRING; req = STRING; la = LIST1 tactic_arg ->
TacArg (TacExternal (loc,com,req,la))
| st = simple_tactic -> TacAtom (loc,st)
| a = may_eval_arg -> TacArg(a)
| IDENT "constr"; ":"; id = METAIDENT ->
TacArg(MetaIdArg (loc,false,id))
| IDENT "constr"; ":"; c = Constr.constr ->
TacArg(ConstrMayEval(ConstrTerm c))
| IDENT "ipattern"; ":"; ipat = simple_intropattern ->
TacArg(IntroPattern ipat)
| r = reference; la = LIST0 tactic_arg ->
TacArg(TacCall (loc,r,la)) ]
| "0"
[ "("; a = tactic_expr; ")" -> a
| a = tactic_atom -> TacArg a ] ]
;
(* binder_tactic: level 5 of tactic_expr *)
binder_tactic:
[ RIGHTA
[ "fun"; it = LIST1 input_fun ; "=>"; body = tactic_expr LEVEL "5" ->
TacFun (it,body)
| "let"; isrec = [IDENT "rec" -> true | -> false];
llc = LIST1 let_clause SEP "with"; "in";
body = tactic_expr LEVEL "5" -> TacLetIn (isrec,llc,body)
| IDENT "info"; tc = tactic_expr LEVEL "5" -> TacInfo tc ] ]
;
(* Tactic arguments *)
tactic_arg:
[ [ IDENT "ltac"; ":"; a = tactic_expr LEVEL "0" -> arg_of_expr a
| IDENT "ltac"; ":"; n = natural -> Integer n
| IDENT "ipattern"; ":"; ipat = simple_intropattern -> IntroPattern ipat
| a = may_eval_arg -> a
| r = reference -> Reference r
| c = Constr.constr -> ConstrMayEval (ConstrTerm c)
(* Unambigous entries: tolerated w/o "ltac:" modifier *)
| id = METAIDENT -> MetaIdArg (loc,true,id)
| "()" -> TacVoid ] ]
;
may_eval_arg:
[ [ c = constr_eval -> ConstrMayEval c
| IDENT "fresh"; l = LIST0 fresh_id -> TacFreshId l ] ]
;
fresh_id:
[ [ s = STRING -> ArgArg s | id = ident -> ArgVar (loc,id) ] ]
;
constr_eval:
[ [ IDENT "eval"; rtc = red_expr; "in"; c = Constr.constr ->
ConstrEval (rtc,c)
| IDENT "context"; id = identref; "["; c = Constr.lconstr; "]" ->
ConstrContext (id,c)
| IDENT "type"; IDENT "of"; c = Constr.constr ->
ConstrTypeOf c ] ]
;
constr_may_eval: (* For extensions *)
[ [ c = constr_eval -> c
| c = Constr.constr -> ConstrTerm c ] ]
;
tactic_atom:
[ [ id = METAIDENT -> MetaIdArg (loc,true,id)
| n = integer -> Integer n
| r = reference -> TacCall (loc,r,[])
| "()" -> TacVoid ] ]
;
match_key:
[ [ "match" -> false | "lazymatch" -> true ] ]
;
input_fun:
[ [ "_" -> None
| l = ident -> Some l ] ]
;
let_clause:
[ [ id = identref; ":="; te = tactic_expr ->
(id, arg_of_expr te)
| id = identref; args = LIST1 input_fun; ":="; te = tactic_expr ->
(id, arg_of_expr (TacFun(args,te))) ] ]
;
match_pattern:
[ [ IDENT "context"; oid = OPT Constr.ident;
"["; pc = Constr.lconstr_pattern; "]" ->
Subterm (false,oid, pc)
| IDENT "appcontext"; oid = OPT Constr.ident;
"["; pc = Constr.lconstr_pattern; "]" ->
Subterm (true,oid, pc)
| pc = Constr.lconstr_pattern -> Term pc ] ]
;
match_hyps:
[ [ na = name; ":"; mp = match_pattern -> Hyp (na, mp)
| na = name; ":="; "["; mpv = match_pattern; "]"; ":"; mpt = match_pattern -> Def (na, mpv, mpt)
| na = name; ":="; mpv = match_pattern ->
let t, ty =
match mpv with
| Term t -> (match t with
| CCast (loc, t, CastConv (_, ty)) -> Term t, Some (Term ty)
| _ -> mpv, None)
| _ -> mpv, None
in Def (na, t, Option.default (Term (CHole (dummy_loc, None))) ty)
] ]
;
match_context_rule:
[ [ largs = LIST0 match_hyps SEP ","; "|-"; mp = match_pattern;
"=>"; te = tactic_expr -> Pat (largs, mp, te)
| "["; largs = LIST0 match_hyps SEP ","; "|-"; mp = match_pattern;
"]"; "=>"; te = tactic_expr -> Pat (largs, mp, te)
| "_"; "=>"; te = tactic_expr -> All te ] ]
;
match_context_list:
[ [ mrl = LIST1 match_context_rule SEP "|" -> mrl
| "|"; mrl = LIST1 match_context_rule SEP "|" -> mrl ] ]
;
match_rule:
[ [ mp = match_pattern; "=>"; te = tactic_expr -> Pat ([],mp,te)
| "_"; "=>"; te = tactic_expr -> All te ] ]
;
match_list:
[ [ mrl = LIST1 match_rule SEP "|" -> mrl
| "|"; mrl = LIST1 match_rule SEP "|" -> mrl ] ]
;
message_token:
[ [ id = identref -> MsgIdent (AI id)
| s = STRING -> MsgString s
| n = integer -> MsgInt n ] ]
;
ltac_def_kind:
[ [ ":=" -> false
| "::=" -> true ] ]
;
(* Definitions for tactics *)
tacdef_body:
[ [ name = Constr.global; it=LIST1 input_fun; redef = ltac_def_kind; body = tactic_expr ->
(name, redef, TacFun (it, body))
| name = Constr.global; redef = ltac_def_kind; body = tactic_expr ->
(name, redef, body) ] ]
;
tactic:
[ [ tac = tactic_expr -> tac ] ]
;
Vernac_.command:
[ [ IDENT "Ltac";
l = LIST1 tacdef_body SEP "with" ->
VernacDeclareTacticDefinition (true, l) ] ]
;
END
|
