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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 10836 2008-04-23 11:43:58Z courtieu $ *)
(* Parsing of vernacular. *)
open Pp
open Lexer
open Util
open Flags
open System
open Vernacexpr
open Vernacinterp
open Ppvernac
(* 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_paths ()) 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 set_formatter_translator() =
let ch = !chan_translate in
let out s b e = output ch s b e in
Format.set_formatter_output_functions out (fun () -> flush ch);
Format.set_max_boxes max_int
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 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;
Format.set_formatter_out_channel stdout
let rec vernac_com interpfun (loc,com) =
let rec interp = function
| VernacLoad (verbosely, fname) ->
let fname = expand_path_macros fname in
(* 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 !Flags.translate_file then
begin
let _,f = find_file_in_path (Library.get_load_paths ())
(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 !Flags.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 !Flags.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)
| v -> if not !just_parsing then interpfun v
in
try
if do_translate () then pr_new_syntax loc (Some com);
interp com
with e ->
Format.set_formatter_out_channel stdout;
raise (DuringCommandInterp (loc, e))
and vernac interpfun input =
vernac_com interpfun (parse_phrase input)
and read_vernac_file verbosely s =
Flags.make_warn verbosely;
let interpfun =
if verbosely then
Vernacentries.interp
else
Flags.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 with a new label to
* make vernac undoing easier. Also freeze state to speed up
* backtracking. *)
let raw_do_vernac po =
vernac (States.with_heavy_rollback Vernacentries.interp) (po,None);
Lib.add_frozen_state();
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 !Flags.translate_file then open_out (file^"8") else stdout;
try
read_vernac_file verb file;
if !Flags.translate_file then close_out !chan_translate;
with e ->
if !Flags.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 !Flags.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 !Flags.xml_export then !xml_end_library ();
Library.save_library_to ldir (long_f_dot_v ^ "o")
|
