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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 Pp
open Compat
open Constrexpr
open Tacexpr
open Misctypes
open Genarg
open Genredexpr
open Tok (* necessary for camlp4 *)
open Pcoq
open Pcoq.Prim
open Pcoq.Tactic
let fail_default_value = ArgArg 0
let arg_of_expr = function
TacArg (loc,a) -> a
| e -> Tacexp (e:raw_tactic_expr)
let genarg_of_unit () = in_gen (rawwit Stdarg.wit_unit) ()
let genarg_of_int n = in_gen (rawwit Stdarg.wit_int) n
let genarg_of_ipattern pat = in_gen (rawwit Constrarg.wit_intro_pattern) pat
(* Tactics grammar rules *)
GEXTEND Gram
GLOBAL: tactic tacdef_body tactic_expr binder_tactic tactic_arg
constr_may_eval constr_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_then_locality: (* [true] for the local variant [TacThens] and [false]
for [TacExtend] *)
[ [ "[" ; l = OPT">" -> if Option.is_empty l then true else false ] ]
;
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; ";"; l = tactic_then_locality; (first,tail) = tactic_then_gen; "]" ->
match l , tail with
| false , Some (t,last) -> TacThen (ta0,TacExtendTac (Array.of_list first, t, last))
| true , Some (t,last) -> TacThens3parts (ta0, Array.of_list first, t, last)
| false , None -> TacThen (ta0,TacDispatch first)
| true , 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 "timeout"; n = int_or_var; ta = tactic_expr -> TacTimeout (n,ta)
| IDENT "time"; s = OPT string; ta = tactic_expr -> TacTime (s,ta)
| IDENT "repeat"; ta = tactic_expr -> TacRepeat ta
| IDENT "progress"; ta = tactic_expr -> TacProgress ta
| IDENT "once"; ta = tactic_expr -> TacOnce ta
| IDENT "exactly_once"; ta = tactic_expr -> TacExactlyOnce ta
| IDENT "infoH"; ta = tactic_expr -> TacShowHyps 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 -> TacOr (ta0,ta1)
| ta0 = tactic_expr; "+"; ta1 = tactic_expr -> TacOr (ta0,ta1)
| IDENT "tryif" ; ta = tactic_expr ;
"then" ; tat = tactic_expr ;
"else" ; tae = tactic_expr -> TacIfThenCatch(ta,tat,tae)
| 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 "idtac"; l = LIST0 message_token -> TacId l
| g=failkw; n = [ n = int_or_var -> n | -> fail_default_value ];
l = LIST0 message_token -> TacFail (g,n,l)
| st = simple_tactic -> st
| IDENT "constr"; ":"; c = Constr.constr ->
TacArg(!@loc,ConstrMayEval(ConstrTerm c))
| a = tactic_top_or_arg -> TacArg(!@loc,a)
| r = reference; la = LIST0 tactic_arg ->
TacArg(!@loc,TacCall (!@loc,r,la)) ]
| "0"
[ "("; a = tactic_expr; ")" -> a
| "["; ">"; (tf,tail) = tactic_then_gen; "]" ->
begin match tail with
| Some (t,tl) -> TacExtendTac(Array.of_list tf,t,tl)
| None -> TacDispatch tf
end
| a = tactic_atom -> TacArg (!@loc,a) ] ]
;
failkw:
[ [ IDENT "fail" -> TacLocal | IDENT "gfail" -> TacGlobal ] ]
;
(* 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:
[ [ "ltac:"; a = tactic_expr LEVEL "0" -> arg_of_expr a
| "ltac:"; n = natural -> TacGeneric (genarg_of_int n)
| a = tactic_top_or_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)
| "()" -> TacGeneric (genarg_of_unit ()) ] ]
;
(* Can be used as argument and at toplevel in tactic expressions. *)
tactic_top_or_arg:
[ [ IDENT "uconstr"; ":" ; c = uconstr -> UConstr c
| IDENT "ipattern"; ":"; ipat = simple_intropattern ->
TacGeneric (genarg_of_ipattern ipat)
| c = constr_eval -> ConstrMayEval c
| IDENT "fresh"; l = LIST0 fresh_id -> TacFreshId l
| IDENT "type_term"; c=uconstr -> TacPretype c
| IDENT "numgoals" -> TacNumgoals ] ]
;
(* If a qualid is given, use its short name. TODO: have the shortest
non ambiguous name where dots are replaced by "_"? Probably too
verbose most of the time. *)
fresh_id:
[ [ s = STRING -> ArgArg s (*| id = ident -> ArgVar (!@loc,id)*)
| qid = qualid -> let (_pth,id) = Libnames.repr_qualid (snd qid) in 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 -> TacGeneric (genarg_of_int n)
| r = reference -> TacCall (!@loc,r,[])
| "()" -> TacGeneric (genarg_of_unit ()) ] ]
;
match_key:
[ [ "match" -> Once
| "lazymatch" -> Select
| "multimatch" -> General ] ]
;
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; "]" ->
let mode = not (!Flags.tactic_context_compat) in
Subterm (mode, oid, pc)
| IDENT "appcontext"; oid = OPT Constr.ident;
"["; pc = Constr.lconstr_pattern; "]" ->
msg_warning (strbrk "appcontext is deprecated");
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 | CastVM ty | CastNative ty)) -> Term t, Some (Term ty)
| _ -> mpv, None)
| _ -> mpv, None
in Def (na, t, Option.default (Term (CHole (Loc.ghost, None, IntroAnonymous, 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 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 ] ]
;
END
|
