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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: vernac.ml,v 1.59.2.3 2004/07/16 20:48:17 herbelin Exp $ *)
+
+(* Parsing of vernacular. *)
+
+open Pp
+open Lexer
+open Util
+open Options
+open System
+open Coqast
+open Vernacexpr
+open Vernacinterp
+open Ppvernacnew
+
+(* The functions in this module may raise (unexplainable!) exceptions.
+ Use the module Coqtoplevel, which catches these exceptions
+ (the exceptions are explained only at the toplevel). *)
+
+exception DuringCommandInterp of Util.loc * exn
+
+(* Specifies which file is read. The intermediate file names are
+ discarded here. The Drop exception becomes an error. We forget
+ if the error ocurred during interpretation or not *)
+
+let raise_with_file file exc =
+ let (cmdloc,re) =
+ match exc with
+ | DuringCommandInterp(loc,e) -> (loc,e)
+ | e -> (dummy_loc,e)
+ in
+ let (inner,inex) =
+ match re with
+ | Error_in_file (_, (b,f,loc), e) when loc <> dummy_loc ->
+ ((b, f, loc), e)
+ | Stdpp.Exc_located (loc, e) when loc <> dummy_loc ->
+ ((false,file, loc), e)
+ | _ -> ((false,file,cmdloc), re)
+ in
+ raise (Error_in_file (file, inner, disable_drop inex))
+
+let real_error = function
+ | Stdpp.Exc_located (_, e) -> e
+ | Error_in_file (_, _, e) -> e
+ | e -> e
+
+(* Opening and closing a channel. Open it twice when verbose: the first
+ channel is used to read the commands, and the second one to print them.
+ Note: we could use only one thanks to seek_in, but seeking on and on in
+ the file we parse seems a bit risky to me. B.B. *)
+
+let open_file_twice_if verbosely fname =
+ let _,longfname = find_file_in_path (Library.get_load_path ()) fname in
+ let in_chan = open_in longfname in
+ let verb_ch = if verbosely then Some (open_in longfname) else None in
+ let po = Pcoq.Gram.parsable (Stream.of_channel in_chan) in
+ (in_chan, longfname, (po, verb_ch))
+
+let close_input in_chan (_,verb) =
+ try
+ close_in in_chan;
+ match verb with
+ | Some verb_ch -> close_in verb_ch
+ | _ -> ()
+ with _ -> ()
+
+let verbose_phrase verbch loc =
+ let loc = unloc loc in
+ match verbch with
+ | Some ch ->
+ let len = snd loc - fst loc in
+ let s = String.create len in
+ seek_in ch (fst loc);
+ really_input ch s 0 len;
+ message s;
+ pp_flush()
+ | _ -> ()
+
+exception End_of_input
+
+let parse_phrase (po, verbch) =
+ match Pcoq.Gram.Entry.parse Pcoq.main_entry po with
+ | Some (loc,_ as com) -> verbose_phrase verbch loc; com
+ | None -> raise End_of_input
+
+(* vernac parses the given stream, executes interpfun on the syntax tree it
+ * parses, and is verbose on "primitives" commands if verbosely is true *)
+
+let just_parsing = ref false
+let chan_translate = ref stdout
+let last_char = ref '\000'
+
+(* postprocessor to avoid lexical icompatibilities between V7 and V8.
+ Ex: auto.(* comment *) or simpl.auto
+ *)
+let set_formatter_translator() =
+ let ch = !chan_translate in
+ let out s b e =
+ let n = e-b in
+ if n > 0 then begin
+ (match !last_char with
+ '.' ->
+ (match s.[b] with
+ '('|'a'..'z'|'A'..'Z' -> output ch " " 0 1
+ | _ -> ())
+ | _ -> ());
+ last_char := s.[e-1]
+ end;
+ output ch s b e
+ in
+ Format.set_formatter_output_functions out (fun () -> flush ch);
+ Format.set_max_boxes max_int
+
+let pre_printing = function
+ | VernacSolve (i,tac,deftac) when Options.do_translate () ->
+ (try
+ let (_,env) = Pfedit.get_goal_context i in
+ let t = Options.with_option Options.translate_syntax
+ (Tacinterp.glob_tactic_env [] env) tac in
+ let pfts = Pfedit.get_pftreestate () in
+ let gls = fst (Refiner.frontier (Tacmach.proof_of_pftreestate pfts)) in
+ Some (env,t,Pfedit.focus(),List.length gls)
+ with UserError _|Stdpp.Exc_located _ -> None)
+ | _ -> None
+
+let post_printing loc (env,t,f,n) = function
+ | VernacSolve (i,_,deftac) ->
+ let loc = unloc loc in
+ set_formatter_translator();
+ let pp = Ppvernacnew.pr_vernac_solve (i,env,t,deftac) ++ sep_end () in
+ (if !translate_file then begin
+ msg (hov 0 (comment (fst loc) ++ pp ++ comment (snd loc - 1)));
+ end
+ else
+ msgnl (hov 4 (str"New Syntax:" ++ fnl() ++ pp)));
+ Format.set_formatter_out_channel stdout
+ | _ -> ()
+
+let pr_new_syntax loc ocom =
+ let loc = unloc loc in
+ if !translate_file then set_formatter_translator();
+ let fs = States.freeze () in
+ let com = match ocom with
+ | Some (VernacV7only _) ->
+ Options.v7_only := true;
+ mt()
+ | Some VernacNop -> mt()
+ | Some com -> pr_vernac com
+ | None -> mt() in
+ if !translate_file then
+ msg (hov 0 (comment (fst loc) ++ com ++ comment (snd loc)))
+ else
+ msgnl (hov 4 (str"New Syntax:" ++ fnl() ++ (hov 0 com)));
+ States.unfreeze fs;
+ Constrintern.set_temporary_implicits_in [];
+ Constrextern.set_temporary_implicits_out [];
+ Format.set_formatter_out_channel stdout
+
+let rec vernac_com interpfun (loc,com) =
+ let rec interp = function
+ | VernacLoad (verbosely, fname) ->
+ (* translator state *)
+ let ch = !chan_translate in
+ let cs = Lexer.com_state() in
+ let cl = !Pp.comments in
+ (* end translator state *)
+ (* coqdoc state *)
+ let cds = Constrintern.coqdoc_freeze() in
+ if !Options.translate_file then begin
+ let _,f = find_file_in_path (Library.get_load_path ())
+ (make_suffix fname ".v") in
+ chan_translate := open_out (f^"8");
+ Pp.comments := []
+ end;
+ begin try
+ read_vernac_file verbosely (make_suffix fname ".v");
+ if !Options.translate_file then close_out !chan_translate;
+ chan_translate := ch;
+ Lexer.restore_com_state cs;
+ Pp.comments := cl;
+ Constrintern.coqdoc_unfreeze cds;
+ with e ->
+ if !Options.translate_file then close_out !chan_translate;
+ chan_translate := ch;
+ Lexer.restore_com_state cs;
+ Pp.comments := cl;
+ Constrintern.coqdoc_unfreeze cds;
+ raise e end;
+
+ | VernacList l -> List.iter (fun (_,v) -> interp v) l
+
+ | VernacTime v ->
+ let tstart = System.get_time() in
+ if not !just_parsing then interp v;
+ let tend = System.get_time() in
+ msgnl (str"Finished transaction in " ++
+ System.fmt_time_difference tstart tend)
+
+ (* To be interpreted in v7 or translator input only *)
+ | VernacV7only v ->
+ Options.v7_only := true;
+ if !Options.v7 || Options.do_translate() then interp v;
+ Options.v7_only := false
+
+ (* To be interpreted in translator output only *)
+ | VernacV8only v ->
+ if not !Options.v7 && not (do_translate()) then
+ interp v
+
+ | v -> if not !just_parsing then interpfun v
+
+ in
+ try
+ Options.v7_only := false;
+ if do_translate () then
+ match pre_printing com with
+ None ->
+ pr_new_syntax loc (Some com);
+ interp com
+ | Some state ->
+ (try
+ interp com;
+ post_printing loc state com
+ with e ->
+ post_printing loc state com;
+ raise e)
+ else
+ interp com
+ with e ->
+ Format.set_formatter_out_channel stdout;
+ Options.v7_only := false;
+ raise (DuringCommandInterp (loc, e))
+
+and vernac interpfun input =
+ vernac_com interpfun (parse_phrase input)
+
+and read_vernac_file verbosely s =
+ let interpfun =
+ if verbosely then
+ Vernacentries.interp
+ else
+ Options.silently Vernacentries.interp
+ in
+ let (in_chan, fname, input) = open_file_twice_if verbosely s in
+ try
+ (* we go out of the following infinite loop when a End_of_input is
+ * raised, which means that we raised the end of the file being loaded *)
+ while true do vernac interpfun input; pp_flush () done
+ with e -> (* whatever the exception *)
+ Format.set_formatter_out_channel stdout;
+ close_input in_chan input; (* we must close the file first *)
+ match real_error e with
+ | End_of_input ->
+ if do_translate () then pr_new_syntax (make_loc (max_int,max_int)) None
+ | _ -> raise_with_file fname e
+
+(* raw_do_vernac : char Stream.t -> unit
+ * parses and executes one command of the vernacular char stream.
+ * Marks the end of the command in the lib_stk to make vernac undoing
+ * easier. *)
+
+let raw_do_vernac po =
+ vernac (States.with_heavy_rollback Vernacentries.interp) (po,None);
+ Lib.mark_end_of_command()
+
+(* XML output hooks *)
+let xml_start_library = ref (fun _ -> ())
+let xml_end_library = ref (fun _ -> ())
+
+let set_xml_start_library f = xml_start_library := f
+let set_xml_end_library f = xml_end_library := f
+
+(* Load a vernac file. Errors are annotated with file and location *)
+let load_vernac verb file =
+ chan_translate :=
+ if !Options.translate_file then open_out (file^"8") else stdout;
+ try
+ read_vernac_file verb file;
+ if !Options.translate_file then close_out !chan_translate;
+ with e ->
+ if !Options.translate_file then close_out !chan_translate;
+ raise_with_file file e
+
+(* Compile a vernac file (f is assumed without .v suffix) *)
+let compile verbosely f =
+ let ldir,long_f_dot_v = Library.start_library f in
+ if !dump then dump_string ("F" ^ Names.string_of_dirpath ldir ^ "\n");
+ if !Options.xml_export then !xml_start_library ();
+ let _ = load_vernac verbosely long_f_dot_v in
+ if Pfedit.get_all_proof_names () <> [] then
+ (message "Error: There are pending proofs"; exit 1);
+ if !Options.xml_export then !xml_end_library ();
+ Library.save_library_to ldir (long_f_dot_v ^ "o")
+
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