author | wenzelm |
Wed, 03 Feb 1999 20:25:53 +0100 | |
changeset 6219 | b360065c2b07 |
parent 6211 | 43d0efafa025 |
child 6233 | 9cc37487f995 |
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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and user data. |
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TODO: |
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- check all these versions of 'use' (!!); |
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- data: ThyInfoFun; |
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- remove operation (GC!?); |
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- update_all operation (!?); |
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- put_theory: |
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. include data; |
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. allow for undef entry only; |
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. elim (via theory_ref); |
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- stronger handling of missing files (!?!?); |
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- register_theory: do not require finished parents (!?) (no?); |
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- observe verbose flag; |
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*) |
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signature BASIC_THY_INFO = |
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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 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 time_use_thy: 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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val verbose: bool ref |
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val names: unit -> string list |
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val get_theory: string -> theory |
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val put_theory: theory -> unit |
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val load_file: Path.T -> unit |
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val use_thy_only: string -> unit |
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val begin_theory: string -> string list -> theory |
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val end_theory: theory -> theory |
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val finish_all: unit -> unit |
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val register_theory: theory -> unit |
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end; |
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signature PRIVATE_THY_INFO = |
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sig |
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include THY_INFO |
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(* FIXME |
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val init_data: Object.kind -> (Object.T * (Object.T -> Object.T) * |
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(Object.T * Object.T -> Object.T) * (Sign.sg -> Object.T -> unit)) -> unit |
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val print_data: Object.kind -> string -> unit |
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val get_data: Object.kind -> (Object.T -> 'a) -> string -> 'a |
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val put_data: Object.kind -> ('a -> Object.T) -> 'a -> unit |
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*) |
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end; |
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structure ThyInfo: PRIVATE_THY_INFO = |
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struct |
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(** thy database **) |
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(* messages *) |
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val verbose = ref false; |
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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 *) (* FIXME more abstract (!?) *) |
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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 = (* FIXME GC (!?!?) *) |
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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: File.info option, files: (Path.T * File.info option) list} option; |
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fun make_depends present outdated master files = |
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Some {present = present, outdated = outdated, master = master, files = files}: deps; |
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type thy = deps * (theory * Object.T Symtab.table) option; |
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type kind = Object.kind * (Object.T * (Object.T -> unit)); |
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local |
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val database = ref (Graph.empty: thy Graph.T, Symtab.empty: kind Symtab.table); |
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in |
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fun get_thys () = #1 (! database); |
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fun get_kinds () = #2 (! database); |
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fun change_thys f = database := (f (get_thys ()), get_kinds ()); |
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fun change_kinds f = database := (get_thys (), f (get_kinds ())); |
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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 () = map #1 (Graph.get_nodes (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 get_files name = (case get_deps name of Some {files, ...} => files | _ => []); |
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fun is_finished name = is_none (get_deps name); |
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144 |
|
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145 |
|
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146 |
(* access theory *) |
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147 |
|
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148 |
fun get_theory name = |
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149 |
(case get_thy name of |
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(_, Some (theory, _)) => theory |
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151 |
| _ => error (loader_msg "undefined theory entry for" [name])); |
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152 |
|
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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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155 |
|
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156 |
fun put_theory theory = |
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157 |
change_thy (PureThy.get_name theory) (fn (deps, _) => (deps, (Some (theory, Symtab.empty)))); |
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158 |
|
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159 |
|
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160 |
|
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161 |
(** thy data **) (* FIXME *) |
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162 |
|
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163 |
|
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164 |
|
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165 |
(** thy operations **) |
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166 |
|
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167 |
fun FIXME msg = writeln ("DEBUG:\n" ^ msg); |
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168 |
|
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169 |
|
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170 |
(* touch_thy -- mark as outdated *) |
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171 |
|
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172 |
fun touch_thy name = change_deps name |
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173 |
(fn None => (warning (loader_msg "tried to touch finished theory" [name]); None) |
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174 |
| Some {present, outdated = _, master, files} => |
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175 |
make_depends present true master files); |
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176 |
|
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177 |
|
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178 |
(* load_thy *) |
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179 |
|
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180 |
fun required_by [] = "" |
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181 |
| required_by initiators = " (required by " ^ show_path (rev initiators) ^ ")"; |
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182 |
|
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183 |
fun load_thy ml time initiators name parents = |
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184 |
let |
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val _ = if name mem_string initiators then error (cycle_msg name (rev initiators)) else (); |
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186 |
val _ = writeln ("Loading theory " ^ quote name ^ required_by initiators); |
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187 |
|
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188 |
val _ = seq touch_thy (thy_graph Graph.all_succs [name]); |
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189 |
val master = ThyLoad.load_thy name ml time; |
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190 |
|
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191 |
val files = get_files name; |
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192 |
val missing_files = mapfilter (fn (path, None) => Some (Path.pack path) | _ => None) files; |
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193 |
in |
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194 |
if null missing_files then () |
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195 |
else warning (loader_msg ("unresolved dependencies on file(s) " ^ commas_quote missing_files ^ |
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196 |
"\nfor theory") [name]); |
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197 |
change_deps name (fn _ => make_depends true false (Some master) files) |
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198 |
end; |
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199 |
|
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200 |
|
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201 |
(* load_file *) |
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202 |
|
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203 |
fun load_file path = |
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204 |
let |
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205 |
fun provide name info (deps as Some {present, outdated, master, files}) = |
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206 |
if exists (equal path o #1) files then |
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207 |
make_depends present outdated master (overwrite (files, (path, Some info))) |
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208 |
else (warning (loader_msg ("undeclared dependency on file " ^ quote (Path.pack path) ^ |
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209 |
"\nfor theory") [name]); deps) |
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210 |
| provide _ _ None = None; |
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211 |
in |
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212 |
(case apsome PureThy.get_name (Context.get_context ()) of |
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213 |
None => (ThyLoad.load_file path; ()) |
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214 |
| Some name => |
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215 |
if is_some (lookup_thy name) then change_deps name (provide name (ThyLoad.load_file path)) |
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216 |
else (ThyLoad.load_file path; ())) |
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217 |
end; |
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218 |
|
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219 |
|
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220 |
(* require_thy *) |
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221 |
|
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222 |
fun init_deps master files = make_depends false false master (map (rpair None) files); |
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223 |
|
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224 |
fun load_deps name ml = |
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225 |
let val (master, (parents, files)) = ThyLoad.deps_thy name ml |
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226 |
in (Some (init_deps (Some master) files), parents) end; |
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227 |
|
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228 |
fun file_current (_, None) = false |
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229 |
| file_current (path, info) = info = ThyLoad.check_file path; |
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230 |
|
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231 |
fun current_deps ml strict name = |
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232 |
(case lookup_deps name of |
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233 |
None => (false, load_deps name ml) |
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234 |
| Some deps => |
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235 |
let val same_deps = (None, thy_graph Graph.imm_preds name) in |
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236 |
(case deps of |
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237 |
None => (true, same_deps) |
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238 |
| Some {present, outdated, master, files} => |
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239 |
if present andalso not strict then (true, same_deps) |
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240 |
else |
6219 | 241 |
let val master' = Some (ThyLoad.check_thy name ml) in |
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242 |
if master <> master' then (false, load_deps name ml) |
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243 |
else (not outdated andalso forall file_current files, same_deps) |
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244 |
end) |
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245 |
end); |
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246 |
|
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247 |
fun outdated name = |
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248 |
(case lookup_deps name of Some (Some {outdated, ...}) => outdated | _ => false); |
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249 |
|
6219 | 250 |
fun untouch None = None |
251 |
| untouch (Some {present, outdated = _, master, files}) = |
|
252 |
make_depends present false master files; |
|
253 |
||
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254 |
fun require_thy ml time strict keep_strict initiators name = |
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255 |
let |
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256 |
val require_parent = |
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257 |
require_thy ml time (strict andalso keep_strict) keep_strict (name :: initiators); |
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258 |
val (current, (new_deps, parents)) = current_deps ml strict name handle ERROR => |
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259 |
error (loader_msg "The error(s) above occurred while examining theory" [name] ^ "\n" ^ |
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260 |
required_by initiators); |
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261 |
val pre_outdated = outdated name; |
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262 |
in |
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263 |
seq require_parent parents; |
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264 |
if current andalso pre_outdated = outdated name then () (* FIXME ?? *) |
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265 |
else |
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266 |
((case new_deps of |
6219 | 267 |
Some deps => change_thys (update_node name parents (untouch deps, None)) |
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268 |
| None => ()); load_thy ml time initiators name parents) |
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269 |
end; |
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270 |
|
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271 |
val weak_use_thy = require_thy true false false false []; |
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272 |
val use_thy = require_thy true false true false []; |
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273 |
val update_thy = require_thy true false true true []; |
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274 |
val time_use_thy = require_thy true true true false []; |
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275 |
val use_thy_only = require_thy false false true false []; |
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276 |
|
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277 |
|
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278 |
(* begin / end theory *) (* FIXME tune *) |
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279 |
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fun begin_theory name parents = |
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let |
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val _ = seq weak_use_thy parents; |
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val theory = PureThy.begin_theory name (map get_theory parents); |
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val _ = change_thys (update_node name parents (init_deps None [], Some (theory, Symtab.empty))); |
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in theory end; |
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286 |
|
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fun end_theory theory = |
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let val theory' = PureThy.end_theory theory |
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in put_theory theory'; theory' end; |
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290 |
|
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291 |
|
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292 |
(* finish entries *) |
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293 |
|
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294 |
(* FIXME |
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295 |
fun finishs names = |
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296 |
let |
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297 |
fun err txt bads = |
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298 |
error (loader_msg txt bads ^ "\n" ^ gen_msg "cannot mark" names ^ " as finished"); |
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299 |
|
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300 |
val all_preds = thy_graph Graph.all_preds names; |
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val noncurrent = filter_out is_current all_preds; |
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val unfinished = filter_out is_finished (all_preds \\ names); |
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303 |
in |
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if not (null noncurrent) then err "non-current theories" noncurrent |
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else if not (null unfinished) then err "unfinished ancestor theories" unfinished |
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306 |
else seq (fn name => change_thy name (apfst (K Finished))) |
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307 |
end; |
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308 |
|
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309 |
fun finish name = finishs [name]; |
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310 |
*) |
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311 |
|
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312 |
fun update_all () = (); (* FIXME fake *) |
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313 |
|
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fun finish_all () = (update_all (); change_thys (Graph.map_nodes (fn (_, entry) => (None, entry)))); |
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315 |
|
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316 |
|
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317 |
(* register existing theories *) |
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318 |
|
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319 |
fun register_theory theory = |
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320 |
let |
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val name = PureThy.get_name theory; |
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322 |
val parents = Theory.parents_of theory; |
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val parent_names = map PureThy.get_name parents; |
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324 |
|
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325 |
fun err txt bads = |
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326 |
error (loader_msg txt bads ^ "\n" ^ gen_msg "cannot register theory" [name]); |
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327 |
|
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328 |
val unfinished = filter_out is_finished parent_names; |
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329 |
fun get_variant (x, y_name) = |
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330 |
if Theory.eq_thy (x, get_theory y_name) then None |
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331 |
else Some y_name; |
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val variants = mapfilter get_variant (parents ~~ parent_names); |
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333 |
|
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334 |
fun register G = |
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335 |
(Graph.new_node (name, (None, Some (theory, Symtab.empty))) G |
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336 |
handle Graph.DUPLICATE _ => err "duplicate theory entry" []) |
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337 |
|> add_deps name parent_names; |
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338 |
in |
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339 |
if not (null unfinished) then err "unfinished parent theories" unfinished |
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340 |
else if not (null variants) then err "different versions of parent theories" variants |
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341 |
else change_thys register |
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342 |
end; |
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343 |
|
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344 |
|
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345 |
(*final declarations of this structure*) |
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346 |
val theory = get_theory; |
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347 |
val names = get_names; |
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348 |
|
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349 |
end; |
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350 |
|
5209 | 351 |
structure BasicThyInfo: BASIC_THY_INFO = ThyInfo; |
352 |
open BasicThyInfo; |