author | wenzelm |
Mon, 04 Oct 1999 12:22:14 +0200 | |
changeset 7687 | 3383b8223e46 |
parent 7589 | 59663b367833 |
child 7892 | a5ba4f52991a |
permissions | -rw-r--r-- |
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(* Title: Pure/Thy/thy_info.ML |
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ID: $Id$ |
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Author: Markus Wenzel, TU Muenchen |
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Theory loader database, including theory and file dependencies. |
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*) |
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signature BASIC_THY_INFO = |
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sig |
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val theory: string -> theory |
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val theory_of_sign: Sign.sg -> theory |
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val theory_of_thm: thm -> theory |
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(*val use: string -> unit*) (*exported later*) |
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val time_use: string -> unit |
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val touch_thy: string -> unit |
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val use_thy: string -> unit |
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val update_thy: string -> unit |
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val remove_thy: string -> unit |
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val time_use_thy: string -> unit |
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val use_thy_only: string -> unit |
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val update_thy_only: string -> unit |
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end; |
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signature THY_INFO = |
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sig |
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include BASIC_THY_INFO |
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datatype action = Update | Outdate | Remove |
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val str_of_action: action -> string |
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val add_hook: (action -> string -> unit) -> unit |
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val names: unit -> string list |
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val lookup_theory: string -> theory option |
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val get_theory: string -> theory |
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val get_preds: string -> string list |
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val loaded_files: string -> ((Path.T * File.info) * bool) list |
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val touch_all_thys: unit -> unit |
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val may_load_file: bool -> bool -> Path.T -> unit |
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val use_path: Path.T -> unit |
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val use: string -> unit |
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val pretend_use: string -> unit |
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val quiet_update_thy: string -> unit |
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val begin_theory: string -> string list -> (Path.T * bool) list -> theory |
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val begin_update_theory: string -> string list -> (Path.T * bool) list -> theory |
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val end_theory: theory -> theory |
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val finish: unit -> unit |
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val register_theory: theory -> unit |
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end; |
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structure ThyInfo: THY_INFO = |
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struct |
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(** theory loader actions and hooks **) |
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datatype action = Update | Outdate | Remove; |
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val str_of_action = fn Update => "Update" | Outdate => "Outdate" | Remove => "Remove"; |
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local |
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val hooks = ref ([]: (action -> string -> unit) list); |
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in |
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fun add_hook f = hooks := f :: ! hooks; |
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fun perform action name = seq (fn f => (try (fn () => f action name) (); ())) (! hooks); |
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end; |
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(** thy database **) |
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(* messages *) |
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fun gen_msg txt [] = txt |
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| gen_msg txt names = txt ^ " " ^ commas_quote names; |
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fun loader_msg txt names = gen_msg ("Theory loader: " ^ txt) names; |
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val show_path = space_implode " via " o map quote; |
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fun cycle_msg name names = loader_msg ("cyclic dependency of " ^ show_path (name :: names)) []; |
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(* derived graph operations *) |
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fun add_deps name parents G = |
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foldl (fn (H, parent) => Graph.add_edge_acyclic (parent, name) H) (G, parents) |
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handle Graph.CYCLES namess => error (cat_lines (map (cycle_msg name) namess)); |
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fun del_deps name G = |
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foldl (fn (H, parent) => Graph.del_edge (parent, name) H) (G, Graph.imm_preds G name); |
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fun update_node name parents entry G = |
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add_deps name parents |
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(if can (Graph.get_node G) name then del_deps name G else Graph.new_node (name, entry) G); |
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(* thy database *) |
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type deps = |
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{present: bool, outdated: bool, |
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master: ThyLoad.master option, files: (Path.T * ((Path.T * File.info) * bool) option) list}; |
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fun make_deps present outdated master files = |
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{present = present, outdated = outdated, master = master, files = files}: deps; |
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fun init_deps master files = Some (make_deps false true master (map (rpair None) files)); |
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type thy = deps option * theory option; |
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local |
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val database = ref (Graph.empty: thy Graph.T); |
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in |
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fun get_thys () = ! database; |
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fun change_thys f = database := (f (! database)); |
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end; |
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(* access thy graph *) |
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fun thy_graph f x = f (get_thys ()) x; |
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fun get_names () = Graph.keys (get_thys ()); |
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(* access thy *) |
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fun lookup_thy name = Some (thy_graph Graph.get_node name) handle Graph.UNDEFINED _ => None; |
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fun get_thy name = |
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(case lookup_thy name of |
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Some thy => thy |
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| None => error (loader_msg "nothing known about theory" [name])); |
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fun change_thy name f = (get_thy name; change_thys (Graph.map_node name f)); |
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(* access deps *) |
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val lookup_deps = apsome #1 o lookup_thy; |
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val get_deps = #1 o get_thy; |
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fun change_deps name f = change_thy name (fn (deps, x) => (f deps, x)); |
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fun is_finished name = is_none (get_deps name); |
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fun get_files name = (case get_deps name of Some {files, ...} => files | _ => []); |
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fun loaded_files name = |
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(case get_deps name of |
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Some {master = Some master, files, ...} => (ThyLoad.get_thy master, true) :: mapfilter #2 files |
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| Some {files, ...} => mapfilter #2 files |
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| None => []); |
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fun get_preds name = |
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(thy_graph Graph.imm_preds name) handle Graph.UNDEFINED _ => |
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error (loader_msg "nothing known about theory" [name]); |
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(* access theory *) |
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fun lookup_theory name = |
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(case lookup_thy name of |
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Some (_, Some thy) => Some thy |
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| _ => None); |
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fun get_theory name = |
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(case lookup_theory name of |
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(Some theory) => theory |
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| _ => error (loader_msg "undefined theory entry for" [name])); |
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val theory_of_sign = get_theory o Sign.name_of; |
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val theory_of_thm = theory_of_sign o Thm.sign_of_thm; |
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fun put_theory name theory = change_thy name (fn (deps, _) => (deps, Some theory)); |
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(** thy operations **) |
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(* maintain 'outdated' flag *) |
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local |
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fun is_outdated name = |
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(case lookup_deps name of |
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Some (Some {outdated, ...}) => outdated |
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| _ => false); |
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fun outdate_thy name = |
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if is_finished name orelse is_outdated name then () |
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else (change_deps name (apsome (fn {present, outdated = _, master, files} => |
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make_deps present true master files)); perform Outdate name); |
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in |
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fun touch_thy name = |
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if is_finished name then warning (loader_msg "tried to touch finished theory" [name]) |
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else seq outdate_thy (thy_graph Graph.all_succs [name]); |
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fun touch_all_thys () = seq outdate_thy (get_names ()); |
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end; |
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(* check 'finished' state *) |
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fun check_unfinished fail name = |
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if is_some (lookup_thy name) andalso is_finished name then |
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fail (loader_msg "cannot update finished theory" [name]) |
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else (); |
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(* may_load_file *) |
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208 |
|
7191 | 209 |
local |
210 |
||
211 |
fun may_run_file really path = |
|
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212 |
let |
7191 | 213 |
val load = ThyLoad.may_load_file really; |
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214 |
fun provide name info (deps as Some {present, outdated, master, files}) = |
6263 | 215 |
if exists (equal path o #1) files then |
7267 | 216 |
Some (make_deps present outdated master |
217 |
(overwrite (files, (path, Some (info, really))))) |
|
6241 | 218 |
else (warning (loader_msg "undeclared dependency of theory" [name] ^ |
6389 | 219 |
" on file: " ^ quote (Path.pack path)); deps) |
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220 |
| provide _ _ None = None; |
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221 |
in |
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222 |
(case apsome PureThy.get_name (Context.get_context ()) of |
7191 | 223 |
None => (load path; ()) |
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224 |
| Some name => |
7191 | 225 |
if is_some (lookup_thy name) then change_deps name (provide name (load path)) |
226 |
else (load path; ())) |
|
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227 |
end; |
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228 |
|
7191 | 229 |
in |
230 |
||
7244 | 231 |
fun may_load_file really time path = |
232 |
if really andalso time then |
|
233 |
let val name = Path.pack path in |
|
234 |
timeit (fn () => |
|
235 |
(writeln ("\n**** Starting file " ^ quote name ^ " ****"); |
|
236 |
may_run_file really path; |
|
237 |
writeln ("**** Finished file " ^ quote name ^ " ****\n"))) |
|
238 |
end |
|
239 |
else may_run_file really path; |
|
7191 | 240 |
|
241 |
end; |
|
6233 | 242 |
|
7244 | 243 |
val use_path = may_load_file true false; |
244 |
val use = use_path o Path.unpack; |
|
245 |
val time_use = may_load_file true true o Path.unpack; |
|
246 |
val pretend_use = may_load_file false false o Path.unpack; |
|
247 |
||
6233 | 248 |
|
7099 | 249 |
(* load_thy *) |
250 |
||
251 |
fun required_by [] = "" |
|
252 |
| required_by initiators = " (required by " ^ show_path (rev initiators) ^ ")"; |
|
253 |
||
254 |
fun load_thy ml time initiators dir name parents = |
|
255 |
let |
|
256 |
val _ = writeln ("Loading theory " ^ quote name ^ required_by initiators); |
|
257 |
||
258 |
val _ = touch_thy name; |
|
259 |
val master = ThyLoad.load_thy dir name ml time; |
|
260 |
||
261 |
val files = get_files name; |
|
262 |
val missing_files = mapfilter (fn (path, None) => Some (Path.pack path) | _ => None) files; |
|
263 |
in |
|
264 |
if null missing_files then () |
|
265 |
else warning (loader_msg "unresolved dependencies of theory" [name] ^ |
|
7223 | 266 |
" on file(s): " ^ commas_quote missing_files); |
7191 | 267 |
change_deps name (fn _ => Some (make_deps true false (Some master) files)); |
7099 | 268 |
perform Update name |
269 |
end; |
|
270 |
||
271 |
||
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272 |
(* require_thy *) |
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273 |
|
7211 | 274 |
local |
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275 |
|
7191 | 276 |
fun load_deps dir name = |
277 |
let val (master, (parents, files)) = ThyLoad.deps_thy dir name |
|
278 |
in (Some (init_deps (Some master) files), parents) end; |
|
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279 |
|
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280 |
fun file_current (_, None) = false |
7267 | 281 |
| file_current (path, info) = (apsome fst info = ThyLoad.check_file path); |
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282 |
|
7191 | 283 |
fun current_deps strict dir name = |
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284 |
(case lookup_deps name of |
7191 | 285 |
None => (false, load_deps dir name) |
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286 |
| Some deps => |
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287 |
let val same_deps = (None, thy_graph Graph.imm_preds name) in |
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288 |
(case deps of |
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289 |
None => (true, same_deps) |
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290 |
| Some {present, outdated, master, files} => |
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291 |
if present andalso not strict then (true, same_deps) |
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292 |
else |
7191 | 293 |
let val master' = Some (ThyLoad.check_thy dir name) in |
294 |
if master <> master' then (false, load_deps dir name) |
|
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295 |
else (not outdated andalso forall file_current files, same_deps) |
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296 |
end) |
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297 |
end); |
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298 |
|
7066 | 299 |
fun require_thy ml time strict keep_strict initiators prfx (visited, str) = |
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300 |
let |
7066 | 301 |
val path = Path.expand (Path.unpack str); |
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302 |
val name = Path.pack (Path.base path); |
7066 | 303 |
in |
7589 | 304 |
if name mem_string initiators then error (cycle_msg name initiators) else (); |
7066 | 305 |
if name mem_string visited then (visited, (true, name)) |
306 |
else |
|
307 |
let |
|
308 |
val dir = Path.append prfx (Path.dir path); |
|
309 |
val req_parent = |
|
7211 | 310 |
require_thy true time (strict andalso keep_strict) keep_strict (name :: initiators) dir; |
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|
311 |
|
7191 | 312 |
val (current, (new_deps, parents)) = current_deps strict dir name handle ERROR => |
7099 | 313 |
error (loader_msg "the error(s) above occurred while examining theory" [name] ^ |
7066 | 314 |
(if null initiators then "" else "\n" ^ required_by initiators)); |
315 |
val (visited', parent_results) = foldl_map req_parent (name :: visited, parents); |
|
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316 |
|
7066 | 317 |
val result = |
318 |
if current andalso forall #1 parent_results then true |
|
319 |
else |
|
320 |
((case new_deps of |
|
7099 | 321 |
Some deps => change_thys (update_node name parents (deps, None)) |
7066 | 322 |
| None => ()); |
7099 | 323 |
load_thy ml time initiators dir name parents; |
324 |
false); |
|
7066 | 325 |
in (visited', (result, name)) end |
326 |
end; |
|
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|
327 |
|
7066 | 328 |
fun gen_use_thy req s = |
329 |
let val (_, (_, name)) = req [] Path.current ([], s) |
|
330 |
in Context.context (get_theory name) end; |
|
6241 | 331 |
|
7244 | 332 |
fun warn_finished f name = (check_unfinished warning name; f name); |
333 |
||
7211 | 334 |
in |
335 |
||
7244 | 336 |
val weak_use_thy = gen_use_thy (require_thy true false false false); |
337 |
val quiet_update_thy = gen_use_thy (require_thy true false true true); |
|
338 |
||
339 |
val use_thy = warn_finished (gen_use_thy (require_thy true false true false)); |
|
340 |
val time_use_thy = warn_finished (gen_use_thy (require_thy true true true false)); |
|
341 |
val use_thy_only = warn_finished (gen_use_thy (require_thy false false true false)); |
|
342 |
val update_thy = warn_finished (gen_use_thy (require_thy true false true true)); |
|
343 |
val update_thy_only = warn_finished (gen_use_thy (require_thy false false true true)); |
|
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344 |
|
7211 | 345 |
end; |
346 |
||
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347 |
|
6666 | 348 |
(* remove_thy *) |
349 |
||
350 |
fun remove_thy name = |
|
351 |
if is_finished name then error (loader_msg "cannot remove finished theory" [name]) |
|
352 |
else |
|
353 |
let val succs = thy_graph Graph.all_succs [name] in |
|
354 |
writeln (loader_msg "removing" succs); |
|
7191 | 355 |
seq (perform Remove) succs; |
356 |
change_thys (Graph.del_nodes succs) |
|
6666 | 357 |
end; |
358 |
||
359 |
||
7066 | 360 |
(* begin / end theory *) |
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361 |
|
7244 | 362 |
fun gen_begin_theory check_thy name parents paths = |
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|
363 |
let |
7244 | 364 |
val _ = check_unfinished error name; |
365 |
val _ = (map Path.basic parents; seq check_thy parents); |
|
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366 |
val theory = PureThy.begin_theory name (map get_theory parents); |
7191 | 367 |
val _ = change_thys (update_node name parents (init_deps None [], Some theory)); |
6329 | 368 |
val use_paths = mapfilter (fn (x, true) => Some x | _ => None) paths; |
369 |
in Context.setmp (Some theory) (seq use_path) use_paths; theory end; |
|
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370 |
|
7244 | 371 |
val begin_theory = gen_begin_theory weak_use_thy; |
372 |
val begin_update_theory = gen_begin_theory quiet_update_thy; |
|
373 |
||
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374 |
fun end_theory theory = |
7099 | 375 |
let |
376 |
val theory' = PureThy.end_theory theory; |
|
377 |
val name = PureThy.get_name theory; |
|
378 |
in put_theory name theory'; theory' end; |
|
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|
379 |
|
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|
380 |
|
6666 | 381 |
(* finish all theories *) |
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|
382 |
|
6666 | 383 |
fun finish () = change_thys (Graph.map_nodes (fn (_, entry) => (None, entry))); |
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|
384 |
|
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|
385 |
|
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|
386 |
(* register existing theories *) |
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|
387 |
|
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|
388 |
fun register_theory theory = |
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|
389 |
let |
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|
390 |
val name = PureThy.get_name theory; |
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|
391 |
val parents = Theory.parents_of theory; |
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|
392 |
val parent_names = map PureThy.get_name parents; |
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|
393 |
|
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|
394 |
fun err txt bads = |
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|
395 |
error (loader_msg txt bads ^ "\n" ^ gen_msg "cannot register theory" [name]); |
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|
396 |
|
6666 | 397 |
val nonfinished = filter_out is_finished parent_names; |
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|
398 |
fun get_variant (x, y_name) = |
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|
399 |
if Theory.eq_thy (x, get_theory y_name) then None |
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|
400 |
else Some y_name; |
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|
401 |
val variants = mapfilter get_variant (parents ~~ parent_names); |
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|
402 |
|
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|
403 |
fun register G = |
6362 | 404 |
(Graph.new_node (name, (None, Some theory)) G |
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|
405 |
handle Graph.DUPLICATE _ => err "duplicate theory entry" []) |
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|
406 |
|> add_deps name parent_names; |
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|
407 |
in |
6666 | 408 |
if not (null nonfinished) then err "non-finished parent theories" nonfinished |
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|
409 |
else if not (null variants) then err "different versions of parent theories" variants |
7099 | 410 |
else (change_thys register; perform Update name) |
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|
411 |
end; |
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|
412 |
|
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|
413 |
|
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|
414 |
(*final declarations of this structure*) |
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|
415 |
val theory = get_theory; |
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|
416 |
val names = get_names; |
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|
417 |
|
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|
418 |
end; |
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|
419 |
|
5209 | 420 |
structure BasicThyInfo: BASIC_THY_INFO = ThyInfo; |
421 |
open BasicThyInfo; |