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|
(************************************************************************)
(* 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 *)
(************************************************************************)
(** * Interface of calls to Coq by CoqIde *)
open Xml_parser
type xml = Xml_parser.xml
type 'a menu = 'a * (string * string) list
type goals =
| Message of string
| Goals of ((string menu) list * string menu) list
(** We use phantom types and GADT to protect ourselves against wild casts *)
type raw = bool
type verbose = bool
type 'a call =
| Interp of raw * verbose * string
| Rewind of int
| Goal
| Status
| InLoadPath of string
| MkCases of string
let interp (r,b,s) : string call = Interp (r,b,s)
let rewind i : int call = Rewind i
let goals : goals call = Goal
let status : string call = Status
let inloadpath s : bool call = InLoadPath s
let mkcases s : string list list call = MkCases s
(** * Coq answers to CoqIde *)
type location = (int * int) option (* start and end of the error *)
type 'a value =
| Good of 'a
| Fail of (location * string)
type handler = {
interp : raw * verbose * string -> string;
rewind : int -> int;
goals : unit -> goals;
status : unit -> string;
inloadpath : string -> bool;
mkcases : string -> string list list;
}
let abstract_eval_call handler explain_exn c =
try
let res = match c with
| Interp (r,b,s) -> Obj.magic (handler.interp (r,b,s))
| Rewind i -> Obj.magic (handler.rewind i)
| Goal -> Obj.magic (handler.goals ())
| Status -> Obj.magic (handler.status ())
| InLoadPath s -> Obj.magic (handler.inloadpath s)
| MkCases s -> Obj.magic (handler.mkcases s)
in Good res
with e ->
let (l,str) = explain_exn e in
Fail (l,str)
(** * XML data marshalling *)
exception Marshal_error
let massoc x l =
try List.assoc x l
with Not_found -> raise Marshal_error
let pcdata = function
| PCData s -> s
| _ -> raise Marshal_error
let singleton = function
| [x] -> x
| _ -> raise Marshal_error
let bool_arg tag b = if b then [tag, ""] else []
let of_bool b =
if b then Element ("bool", ["val", "true"], [])
else Element ("bool", ["val", "false"], [])
let to_bool = function
| Element ("bool", attrs, []) ->
let ans = massoc "val" attrs in
begin match ans with
| "true" -> true
| "false" -> false
| _ -> raise Marshal_error
end
| _ -> raise Marshal_error
let of_list f l =
Element ("list", [], List.map f l)
let to_list f = function
| Element ("list", [], l) ->
List.map f l
| _ -> raise Marshal_error
let of_value f = function
| Good x -> Element ("value", ["val", "good"], [f x])
| Fail (loc, msg) ->
let loc = match loc with
| None -> []
| Some (s, e) -> [("loc_s", string_of_int s); ("loc_e", string_of_int e)]
in
Element ("value", ["val", "fail"] @ loc, [])
let to_value f = function
| Element ("value", attrs, l) ->
let ans = massoc "val" attrs in
if ans = "good" then Good (f (singleton l))
else if ans = "fail" then
let loc =
try
let loc_s = int_of_string (List.assoc "loc_s" attrs) in
let loc_e = int_of_string (List.assoc "loc_e" attrs) in
Some (loc_s, loc_e)
with _ -> None
in
let msg = pcdata (singleton l) in
Fail (loc, msg)
else raise Marshal_error
| _ -> raise Marshal_error
let of_call = function
| Interp (raw, vrb, cmd) ->
let flags = (bool_arg "raw" raw) @ (bool_arg "verbose" vrb) in
Element ("call", ("val", "interp") :: flags, [PCData cmd])
| Rewind n ->
Element ("call", ("val", "rewind") :: ["steps", string_of_int n], [])
| Goal ->
Element ("call", ["val", "goal"], [])
| Status ->
Element ("call", ["val", "status"], [])
| InLoadPath file ->
Element ("call", ["val", "inloadpath"], [PCData file])
| MkCases ind ->
Element ("call", ["val", "mkcases"], [PCData ind])
let to_call = function
| Element ("call", attrs, l) ->
let ans = massoc "val" attrs in
begin match ans with
| "interp" ->
let raw = List.mem_assoc "raw" attrs in
let vrb = List.mem_assoc "verbose" attrs in
Interp (raw, vrb, pcdata (singleton l))
| "rewind" ->
let steps = int_of_string (massoc "steps" attrs) in
Rewind steps
| "goal" -> Goal
| "status" -> Status
| "inloadpath" -> InLoadPath (pcdata (singleton l))
| "mkcases" -> MkCases (pcdata (singleton l))
| _ -> raise Marshal_error
end
| _ -> raise Marshal_error
(** * Debug printing *)
let pr_call = function
| Interp (r,b,s) ->
let raw = if r then "RAW" else "" in
let verb = if b then "" else "SILENT" in
"INTERP"^raw^verb^" ["^s^"]"
| Rewind i -> "REWIND "^(string_of_int i)
| Goal -> "GOALS"
| Status -> "STATUS"
| InLoadPath s -> "INLOADPATH "^s
| MkCases s -> "MKCASES "^s
let pr_value_gen pr = function
| Good v -> "GOOD " ^ pr v
| Fail (_,str) -> "FAIL ["^str^"]"
let pr_value v = pr_value_gen (fun _ -> "") v
let pr_string s = "["^s^"]"
let pr_bool b = if b then "true" else "false"
let pr_mkcases l =
let l = List.map (String.concat " ") l in
"[" ^ String.concat " | " l ^ "]"
let pr_goals = function
| Message s -> "Message: " ^ s
| Goals gl ->
let pr_menu (s, _) = s in
let pr_goal (hyps, goal) =
"[" ^ String.concat "; " (List.map pr_menu hyps) ^ " |- " ^ pr_menu goal ^ "]"
in
String.concat " " (List.map pr_goal gl)
let pr_full_value call value =
match call with
| Interp _ -> pr_value_gen pr_string (Obj.magic value)
| Rewind i -> pr_value_gen string_of_int (Obj.magic value)
| Goal -> pr_value_gen pr_goals (Obj.magic value)
| Status -> pr_value_gen pr_string (Obj.magic value)
| InLoadPath s -> pr_value_gen pr_bool (Obj.magic value)
| MkCases s -> pr_value_gen pr_mkcases (Obj.magic value)
|
