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Diffstat (limited to 'grammar/argextend.ml4')
| -rw-r--r-- | grammar/argextend.ml4 | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/grammar/argextend.ml4 b/grammar/argextend.ml4 new file mode 100644 index 000000000..a13059799 --- /dev/null +++ b/grammar/argextend.ml4 @@ -0,0 +1,339 @@ +(************************************************************************) +(* v * The Coq Proof Assistant / The Coq Development Team *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(************************************************************************) + +(*i camlp4deps: "tools/compat5b.cmo" i*) + +open Genarg +open Q_util +open Egramml +open Pcoq +open Compat + +let loc = Pp.dummy_loc +let default_loc = <:expr< Pp.dummy_loc >> + +let rec make_rawwit loc = function + | BoolArgType -> <:expr< Genarg.rawwit_bool >> + | IntArgType -> <:expr< Genarg.rawwit_int >> + | IntOrVarArgType -> <:expr< Genarg.rawwit_int_or_var >> + | StringArgType -> <:expr< Genarg.rawwit_string >> + | PreIdentArgType -> <:expr< Genarg.rawwit_pre_ident >> + | IntroPatternArgType -> <:expr< Genarg.rawwit_intro_pattern >> + | IdentArgType b -> <:expr< Genarg.rawwit_ident_gen $mlexpr_of_bool b$ >> + | VarArgType -> <:expr< Genarg.rawwit_var >> + | RefArgType -> <:expr< Genarg.rawwit_ref >> + | SortArgType -> <:expr< Genarg.rawwit_sort >> + | ConstrArgType -> <:expr< Genarg.rawwit_constr >> + | ConstrMayEvalArgType -> <:expr< Genarg.rawwit_constr_may_eval >> + | QuantHypArgType -> <:expr< Genarg.rawwit_quant_hyp >> + | RedExprArgType -> <:expr< Genarg.rawwit_red_expr >> + | OpenConstrArgType b -> <:expr< Genarg.rawwit_open_constr_gen $mlexpr_of_bool b$ >> + | ConstrWithBindingsArgType -> <:expr< Genarg.rawwit_constr_with_bindings >> + | BindingsArgType -> <:expr< Genarg.rawwit_bindings >> + | List0ArgType t -> <:expr< Genarg.wit_list0 $make_rawwit loc t$ >> + | List1ArgType t -> <:expr< Genarg.wit_list1 $make_rawwit loc t$ >> + | OptArgType t -> <:expr< Genarg.wit_opt $make_rawwit loc t$ >> + | PairArgType (t1,t2) -> + <:expr< Genarg.wit_pair $make_rawwit loc t1$ $make_rawwit loc t2$ >> + | ExtraArgType s -> + <:expr< + let module WIT = struct + open Extrawit; + value wit = $lid:"rawwit_"^s$; + end in WIT.wit >> + +let rec make_globwit loc = function + | BoolArgType -> <:expr< Genarg.globwit_bool >> + | IntArgType -> <:expr< Genarg.globwit_int >> + | IntOrVarArgType -> <:expr< Genarg.globwit_int_or_var >> + | StringArgType -> <:expr< Genarg.globwit_string >> + | PreIdentArgType -> <:expr< Genarg.globwit_pre_ident >> + | IntroPatternArgType -> <:expr< Genarg.globwit_intro_pattern >> + | IdentArgType b -> <:expr< Genarg.globwit_ident_gen $mlexpr_of_bool b$ >> + | VarArgType -> <:expr< Genarg.globwit_var >> + | RefArgType -> <:expr< Genarg.globwit_ref >> + | QuantHypArgType -> <:expr< Genarg.globwit_quant_hyp >> + | SortArgType -> <:expr< Genarg.globwit_sort >> + | ConstrArgType -> <:expr< Genarg.globwit_constr >> + | ConstrMayEvalArgType -> <:expr< Genarg.globwit_constr_may_eval >> + | RedExprArgType -> <:expr< Genarg.globwit_red_expr >> + | OpenConstrArgType b -> <:expr< Genarg.globwit_open_constr_gen $mlexpr_of_bool b$ >> + | ConstrWithBindingsArgType -> <:expr< Genarg.globwit_constr_with_bindings >> + | BindingsArgType -> <:expr< Genarg.globwit_bindings >> + | List0ArgType t -> <:expr< Genarg.wit_list0 $make_globwit loc t$ >> + | List1ArgType t -> <:expr< Genarg.wit_list1 $make_globwit loc t$ >> + | OptArgType t -> <:expr< Genarg.wit_opt $make_globwit loc t$ >> + | PairArgType (t1,t2) -> + <:expr< Genarg.wit_pair $make_globwit loc t1$ $make_globwit loc t2$ >> + | ExtraArgType s -> + <:expr< + let module WIT = struct + open Extrawit; + value wit = $lid:"globwit_"^s$; + end in WIT.wit >> + +let rec make_wit loc = function + | BoolArgType -> <:expr< Genarg.wit_bool >> + | IntArgType -> <:expr< Genarg.wit_int >> + | IntOrVarArgType -> <:expr< Genarg.wit_int_or_var >> + | StringArgType -> <:expr< Genarg.wit_string >> + | PreIdentArgType -> <:expr< Genarg.wit_pre_ident >> + | IntroPatternArgType -> <:expr< Genarg.wit_intro_pattern >> + | IdentArgType b -> <:expr< Genarg.wit_ident_gen $mlexpr_of_bool b$ >> + | VarArgType -> <:expr< Genarg.wit_var >> + | RefArgType -> <:expr< Genarg.wit_ref >> + | QuantHypArgType -> <:expr< Genarg.wit_quant_hyp >> + | SortArgType -> <:expr< Genarg.wit_sort >> + | ConstrArgType -> <:expr< Genarg.wit_constr >> + | ConstrMayEvalArgType -> <:expr< Genarg.wit_constr_may_eval >> + | RedExprArgType -> <:expr< Genarg.wit_red_expr >> + | OpenConstrArgType b -> <:expr< Genarg.wit_open_constr_gen $mlexpr_of_bool b$ >> + | ConstrWithBindingsArgType -> <:expr< Genarg.wit_constr_with_bindings >> + | BindingsArgType -> <:expr< Genarg.wit_bindings >> + | List0ArgType t -> <:expr< Genarg.wit_list0 $make_wit loc t$ >> + | List1ArgType t -> <:expr< Genarg.wit_list1 $make_wit loc t$ >> + | OptArgType t -> <:expr< Genarg.wit_opt $make_wit loc t$ >> + | PairArgType (t1,t2) -> + <:expr< Genarg.wit_pair $make_wit loc t1$ $make_wit loc t2$ >> + | ExtraArgType s -> + <:expr< + let module WIT = struct + open Extrawit; + value wit = $lid:"wit_"^s$; + end in WIT.wit >> + +let has_extraarg = + List.exists (function GramNonTerminal(_,ExtraArgType _,_,_) -> true | _ -> false) + +let statically_known_possibly_empty s (prods,_) = + List.for_all (function + | GramNonTerminal(_,ExtraArgType s',_,_) -> + (* For ExtraArg we don't know (we'll have to test dynamically) *) + (* unless it is a recursive call *) + s <> s' + | GramNonTerminal(_,(OptArgType _|List0ArgType _),_,_) -> + (* Opt and List0 parses the empty string *) + true + | _ -> + (* This consumes a token for sure *) false) + prods + +let possibly_empty_subentries loc (prods,act) = + let bind_name p v e = match p with + | None -> e + | Some id -> + let s = Names.string_of_id id in <:expr< let $lid:s$ = $v$ in $e$ >> in + let rec aux = function + | [] -> <:expr< let loc = $default_loc$ in let _ = loc = loc in $act$ >> + | GramNonTerminal(_,OptArgType _,_,p) :: tl -> + bind_name p <:expr< None >> (aux tl) + | GramNonTerminal(_,List0ArgType _,_,p) :: tl -> + bind_name p <:expr< [] >> (aux tl) + | GramNonTerminal(_,(ExtraArgType _ as t),_,p) :: tl -> + (* We check at runtime if extraarg s parses "epsilon" *) + let s = match p with None -> "_" | Some id -> Names.string_of_id id in + <:expr< let $lid:s$ = match Genarg.default_empty_value $make_rawwit loc t$ with + [ None -> raise Exit + | Some v -> v ] in $aux tl$ >> + | _ -> assert false (* already filtered out *) in + if has_extraarg prods then + (* Needs a dynamic check; catch all exceptions if ever some rhs raises *) + (* an exception rather than returning a value; *) + (* declares loc because some code can refer to it; *) + (* ensures loc is used to avoid "unused variable" warning *) + (true, <:expr< try Some $aux prods$ with [ _ -> None ] >>) + else + (* Static optimisation *) + (false, aux prods) + +let make_possibly_empty_subentries loc s cl = + let cl = List.filter (statically_known_possibly_empty s) cl in + if cl = [] then + <:expr< None >> + else + let rec aux = function + | (true, e) :: l -> + <:expr< match $e$ with [ Some v -> Some v | None -> $aux l$ ] >> + | (false, e) :: _ -> + <:expr< Some $e$ >> + | [] -> + <:expr< None >> in + aux (List.map (possibly_empty_subentries loc) cl) + +let make_act loc act pil = + let rec make = function + | [] -> <:expr< Pcoq.Gram.action (fun loc -> ($act$ : 'a)) >> + | GramNonTerminal (_,t,_,Some p) :: tl -> + let p = Names.string_of_id p in + <:expr< + Pcoq.Gram.action + (fun $lid:p$ -> + let _ = Genarg.in_gen $make_rawwit loc t$ $lid:p$ in $make tl$) + >> + | (GramTerminal _ | GramNonTerminal (_,_,_,None)) :: tl -> + <:expr< Pcoq.Gram.action (fun _ -> $make tl$) >> in + make (List.rev pil) + +let make_prod_item = function + | GramTerminal s -> <:expr< Pcoq.gram_token_of_string $str:s$ >> + | GramNonTerminal (_,_,g,_) -> + <:expr< Pcoq.symbol_of_prod_entry_key $mlexpr_of_prod_entry_key g$ >> + +let make_rule loc (prods,act) = + <:expr< ($mlexpr_of_list make_prod_item prods$,$make_act loc act prods$) >> + +let declare_tactic_argument loc s (typ, pr, f, g, h) cl = + let rawtyp, rawpr, globtyp, globpr = match typ with + | `Uniform typ -> typ, pr, typ, pr + | `Specialized (a, b, c, d) -> a, b, c, d + in + let glob = match g with + | None -> + <:expr< fun e x -> + out_gen $make_globwit loc rawtyp$ + (Tacinterp.intern_genarg e + (Genarg.in_gen $make_rawwit loc rawtyp$ x)) >> + | Some f -> <:expr< $lid:f$>> in + let interp = match f with + | None -> + <:expr< fun ist gl x -> + let (sigma,a_interp) = + Tacinterp.interp_genarg ist gl + (Genarg.in_gen $make_globwit loc globtyp$ x) + in + (sigma , out_gen $make_wit loc globtyp$ a_interp)>> + | Some f -> <:expr< $lid:f$>> in + let substitute = match h with + | None -> + <:expr< fun s x -> + out_gen $make_globwit loc globtyp$ + (Tacinterp.subst_genarg s + (Genarg.in_gen $make_globwit loc globtyp$ x)) >> + | Some f -> <:expr< $lid:f$>> in + let se = mlexpr_of_string s in + let wit = <:expr< $lid:"wit_"^s$ >> in + let rawwit = <:expr< $lid:"rawwit_"^s$ >> in + let globwit = <:expr< $lid:"globwit_"^s$ >> in + let rules = mlexpr_of_list (make_rule loc) (List.rev cl) in + let default_value = <:expr< $make_possibly_empty_subentries loc s cl$ >> in + declare_str_items loc + [ <:str_item< + value ($lid:"wit_"^s$, $lid:"globwit_"^s$, $lid:"rawwit_"^s$) = + Genarg.create_arg $default_value$ $se$>>; + <:str_item< + value $lid:s$ = Pcoq.create_generic_entry $se$ $rawwit$ >>; + <:str_item< do { + Tacinterp.add_interp_genarg $se$ + ((fun e x -> + (Genarg.in_gen $globwit$ ($glob$ e (out_gen $rawwit$ x)))), + (fun ist gl x -> + let (sigma,a_interp) = $interp$ ist gl (out_gen $globwit$ x) in + (sigma , Genarg.in_gen $wit$ a_interp)), + (fun subst x -> + (Genarg.in_gen $globwit$ ($substitute$ subst (out_gen $globwit$ x))))); + Compat.maybe_uncurry (Pcoq.Gram.extend ($lid:s$ : Pcoq.Gram.entry 'a)) + (None, [(None, None, $rules$)]); + Pptactic.declare_extra_genarg_pprule + ($rawwit$, $lid:rawpr$) + ($globwit$, $lid:globpr$) + ($wit$, $lid:pr$) } + >> ] + +let declare_vernac_argument loc s pr cl = + let se = mlexpr_of_string s in + let wit = <:expr< $lid:"wit_"^s$ >> in + let rawwit = <:expr< $lid:"rawwit_"^s$ >> in + let globwit = <:expr< $lid:"globwit_"^s$ >> in + let rules = mlexpr_of_list (make_rule loc) (List.rev cl) in + let pr_rules = match pr with + | None -> <:expr< fun _ _ _ _ -> str $str:"[No printer for "^s^"]"$ >> + | Some pr -> <:expr< fun _ _ _ -> $lid:pr$ >> in + declare_str_items loc + [ <:str_item< + value (($lid:"wit_"^s$:Genarg.abstract_argument_type unit Genarg.tlevel), + ($lid:"globwit_"^s$:Genarg.abstract_argument_type unit Genarg.glevel), + $lid:"rawwit_"^s$) = Genarg.create_arg None $se$ >>; + <:str_item< + value $lid:s$ = Pcoq.create_generic_entry $se$ $rawwit$ >>; + <:str_item< do { + Compat.maybe_uncurry (Pcoq.Gram.extend ($lid:s$ : Pcoq.Gram.entry 'a)) + (None, [(None, None, $rules$)]); + Pptactic.declare_extra_genarg_pprule + ($rawwit$, $pr_rules$) + ($globwit$, fun _ _ _ _ -> Errors.anomaly "vernac argument needs not globwit printer") + ($wit$, fun _ _ _ _ -> Errors.anomaly "vernac argument needs not wit printer") } + >> ] + +open Vernacexpr +open Pcoq +open Pcaml +open PcamlSig + +EXTEND + GLOBAL: str_item; + str_item: + [ [ "ARGUMENT"; "EXTEND"; s = entry_name; + header = argextend_header; + OPT "|"; l = LIST1 argrule SEP "|"; + "END" -> + declare_tactic_argument loc s header l + | "VERNAC"; "ARGUMENT"; "EXTEND"; s = entry_name; + pr = OPT ["PRINTED"; "BY"; pr = LIDENT -> pr]; + OPT "|"; l = LIST1 argrule SEP "|"; + "END" -> + declare_vernac_argument loc s pr l ] ] + ; + argextend_header: + [ [ "TYPED"; "AS"; typ = argtype; + "PRINTED"; "BY"; pr = LIDENT; + f = OPT [ "INTERPRETED"; "BY"; f = LIDENT -> f ]; + g = OPT [ "GLOBALIZED"; "BY"; f = LIDENT -> f ]; + h = OPT [ "SUBSTITUTED"; "BY"; f = LIDENT -> f ] -> + (`Uniform typ, pr, f, g, h) + | "PRINTED"; "BY"; pr = LIDENT; + f = OPT [ "INTERPRETED"; "BY"; f = LIDENT -> f ]; + g = OPT [ "GLOBALIZED"; "BY"; f = LIDENT -> f ]; + h = OPT [ "SUBSTITUTED"; "BY"; f = LIDENT -> f ]; + "RAW_TYPED"; "AS"; rawtyp = argtype; + "RAW_PRINTED"; "BY"; rawpr = LIDENT; + "GLOB_TYPED"; "AS"; globtyp = argtype; + "GLOB_PRINTED"; "BY"; globpr = LIDENT -> + (`Specialized (rawtyp, rawpr, globtyp, globpr), pr, f, g, h) ] ] + ; + argtype: + [ "2" + [ e1 = argtype; "*"; e2 = argtype -> PairArgType (e1, e2) ] + | "1" + [ e = argtype; LIDENT "list" -> List0ArgType e + | e = argtype; LIDENT "option" -> OptArgType e ] + | "0" + [ e = LIDENT -> fst (interp_entry_name false None e "") + | "("; e = argtype; ")" -> e ] ] + ; + argrule: + [ [ "["; l = LIST0 genarg; "]"; "->"; "["; e = Pcaml.expr; "]" -> (l,e) ] ] + ; + genarg: + [ [ e = LIDENT; "("; s = LIDENT; ")" -> + let t, g = interp_entry_name false None e "" in + GramNonTerminal (loc, t, g, Some (Names.id_of_string s)) + | e = LIDENT; "("; s = LIDENT; ","; sep = STRING; ")" -> + let t, g = interp_entry_name false None e sep in + GramNonTerminal (loc, t, g, Some (Names.id_of_string s)) + | s = STRING -> + if String.length s > 0 && Util.is_letter s.[0] then + Lexer.add_keyword s; + GramTerminal s + ] ] + ; + entry_name: + [ [ s = LIDENT -> s + | UIDENT -> failwith "Argument entry names must be lowercase" + ] ] + ; + END |