author | wenzelm |
Fri, 09 Jan 2009 23:33:59 +0100 | |
changeset 29417 | 779ff1187327 |
parent 29370 | 98aaf2cd873f |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/isar.ML |
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Author: Makarius |
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The global Isabelle/Isar state and main read-eval-print loop. |
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*) |
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signature ISAR = |
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sig |
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val init: unit -> unit |
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val exn: unit -> (exn * string) option |
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val state: unit -> Toplevel.state |
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val context: unit -> Proof.context |
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val goal: unit -> thm |
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val print: unit -> unit |
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val >> : Toplevel.transition -> bool |
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val >>> : Toplevel.transition list -> unit |
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val linear_undo: int -> unit |
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val undo: int -> unit |
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val kill: unit -> unit |
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val kill_proof: unit -> unit |
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val crashes: exn list ref |
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val toplevel_loop: {init: bool, welcome: bool, sync: bool, secure: bool} -> unit |
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val loop: unit -> unit |
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val main: unit -> unit |
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type id = string |
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val no_id: id |
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val create_command: Toplevel.transition -> id |
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val insert_command: id -> id -> unit |
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val remove_command: id -> unit |
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end; |
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structure Isar: ISAR = |
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struct |
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(** TTY model -- SINGLE-THREADED! **) |
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(* the global state *) |
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type history = (Toplevel.state * Toplevel.transition) list; |
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(*previous state, state transition -- regular commands only*) |
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local |
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val global_history = ref ([]: history); |
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val global_state = ref Toplevel.toplevel; |
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val global_exn = ref (NONE: (exn * string) option); |
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in |
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fun edit_history count f = NAMED_CRITICAL "Isar" (fn () => |
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let |
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fun edit 0 (st, hist) = (global_history := hist; global_state := st; global_exn := NONE) |
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| edit n (st, hist) = edit (n - 1) (f st hist); |
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in edit count (! global_state, ! global_history) end); |
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fun state () = NAMED_CRITICAL "Isar" (fn () => ! global_state); |
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fun set_state state = NAMED_CRITICAL "Isar" (fn () => global_state := state); |
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fun exn () = NAMED_CRITICAL "Isar" (fn () => ! global_exn); |
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fun set_exn exn = NAMED_CRITICAL "Isar" (fn () => global_exn := exn); |
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end; |
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fun init () = edit_history 1 (K (K (Toplevel.toplevel, []))); |
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fun context () = Toplevel.context_of (state ()) |
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handle Toplevel.UNDEF => error "Unknown context"; |
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fun goal () = #2 (#2 (Proof.get_goal (Toplevel.proof_of (state ())))) |
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handle Toplevel.UNDEF => error "No goal present"; |
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fun print () = Toplevel.print_state false (state ()); |
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(* history navigation *) |
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local |
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fun find_and_undo _ [] = error "Undo history exhausted" |
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| find_and_undo which ((prev, tr) :: hist) = |
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((case Toplevel.init_of tr of SOME name => ThyInfo.kill_thy name | NONE => ()); |
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if which (Toplevel.name_of tr) then (prev, hist) else find_and_undo which hist); |
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in |
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fun linear_undo n = edit_history n (K (find_and_undo (K true))); |
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fun undo n = edit_history n (fn st => fn hist => |
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find_and_undo (if Toplevel.is_proof st then K true else OuterKeyword.is_theory) hist); |
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fun kill () = edit_history 1 (fn st => fn hist => |
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find_and_undo |
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(if Toplevel.is_proof st then OuterKeyword.is_theory else OuterKeyword.is_theory_begin) hist); |
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fun kill_proof () = edit_history 1 (fn st => fn hist => |
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if Toplevel.is_proof st then find_and_undo OuterKeyword.is_theory hist |
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else raise Toplevel.UNDEF); |
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end; |
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(* interactive state transformations *) |
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fun op >> tr = |
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(case Toplevel.transition true tr (state ()) of |
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NONE => false |
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| SOME (_, SOME err) => (set_exn (SOME err); Toplevel.error_msg tr err; true) |
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| SOME (st', NONE) => |
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let |
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val name = Toplevel.name_of tr; |
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val _ = if OuterKeyword.is_theory_begin name then init () else (); |
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val _ = |
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if OuterKeyword.is_regular name |
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then edit_history 1 (fn st => fn hist => (st', (st, tr) :: hist)) else (); |
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in true end); |
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fun op >>> [] = () |
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| op >>> (tr :: trs) = if op >> tr then op >>> trs else (); |
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(* toplevel loop *) |
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val crashes = ref ([]: exn list); |
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125 |
|
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126 |
local |
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127 |
|
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fun raw_loop secure src = |
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let |
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fun check_secure () = |
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(if secure then warning "Secure loop -- cannot exit to ML" else (); secure); |
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in |
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(case Source.get_single (Source.set_prompt Source.default_prompt src) of |
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NONE => if secure then quit () else () |
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| SOME (tr, src') => if op >> tr orelse check_secure () then raw_loop secure src' else ()) |
29370 | 136 |
handle exn => |
137 |
(Output.error_msg (Toplevel.exn_message exn) |
|
138 |
handle crash => |
|
139 |
(CRITICAL (fn () => change crashes (cons crash)); |
|
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warning "Recovering from Isar toplevel crash -- see also Isar.crashes"); |
|
141 |
raw_loop secure src) |
|
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end; |
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143 |
|
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144 |
in |
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145 |
|
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fun toplevel_loop {init = do_init, welcome, sync, secure} = |
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(Context.set_thread_data NONE; |
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if do_init then init () else (); (* FIXME init editor model *) |
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if welcome then writeln (Session.welcome ()) else (); |
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uninterruptible (fn _ => fn () => raw_loop secure (OuterSyntax.isar sync)) ()); |
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151 |
|
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152 |
end; |
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153 |
|
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fun loop () = |
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toplevel_loop {init = false, welcome = false, sync = false, secure = Secure.is_secure ()}; |
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156 |
|
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fun main () = |
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toplevel_loop {init = true, welcome = true, sync = false, secure = Secure.is_secure ()}; |
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159 |
|
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160 |
|
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161 |
|
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(** individual toplevel commands **) |
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163 |
|
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(* unique identification *) |
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165 |
|
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type id = string; |
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val no_id : id = ""; |
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168 |
|
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169 |
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(* command category *) |
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|
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datatype category = Empty | Theory | Proof | Diag | Control; |
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173 |
|
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fun category_of tr = |
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let val name = Toplevel.name_of tr in |
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if name = "" then Empty |
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else if OuterKeyword.is_theory name then Theory |
178 |
else if OuterKeyword.is_proof name then Proof |
|
179 |
else if OuterKeyword.is_diag name then Diag |
|
180 |
else Control |
|
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end; |
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182 |
|
27524 | 183 |
val is_theory = fn Theory => true | _ => false; |
184 |
val is_proper = fn Theory => true | Proof => true | _ => false; |
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val is_regular = fn Control => false | _ => true; |
27524 | 186 |
|
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187 |
|
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(* command status *) |
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189 |
|
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datatype status = |
27616 | 191 |
Unprocessed | |
192 |
Running | |
|
193 |
Failed of exn * string | |
|
194 |
Finished of Toplevel.state; |
|
195 |
||
196 |
fun status_markup Unprocessed = Markup.unprocessed |
|
29417 | 197 |
| status_markup Running = (Markup.runningN, []) |
27616 | 198 |
| status_markup (Failed _) = Markup.failed |
199 |
| status_markup (Finished _) = Markup.finished; |
|
200 |
||
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fun run int tr state = |
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(case Toplevel.transition int tr state of |
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NONE => NONE |
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| SOME (_, SOME err) => (Toplevel.error_msg tr err; SOME (Failed err)) |
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| SOME (state', NONE) => SOME (Finished state')); |
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206 |
|
27616 | 207 |
|
208 |
(* datatype command *) |
|
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209 |
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datatype command = Command of |
27501 | 211 |
{category: category, |
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transition: Toplevel.transition, |
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status: status}; |
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214 |
|
27501 | 215 |
fun make_command (category, transition, status) = |
216 |
Command {category = category, transition = transition, status = status}; |
|
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217 |
|
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val empty_command = |
27616 | 219 |
make_command (Empty, Toplevel.empty, Finished Toplevel.toplevel); |
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220 |
|
27501 | 221 |
fun map_command f (Command {category, transition, status}) = |
222 |
make_command (f (category, transition, status)); |
|
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223 |
|
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fun map_status f = map_command (fn (category, transition, status) => |
225 |
(category, transition, f status)); |
|
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226 |
|
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The global Isabelle/Isar state and main read-eval-print loop.
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227 |
|
27501 | 228 |
(* global collection of identified commands *) |
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229 |
|
27518 | 230 |
fun err_dup id = sys_error ("Duplicate command " ^ quote id); |
231 |
fun err_undef id = sys_error ("Unknown command " ^ quote id); |
|
232 |
||
27616 | 233 |
local val global_commands = ref (Graph.empty: command Graph.T) in |
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234 |
|
27501 | 235 |
fun change_commands f = NAMED_CRITICAL "Isar" (fn () => change global_commands f) |
27616 | 236 |
handle Graph.DUP bad => err_dup bad | Graph.UNDEF bad => err_undef bad; |
237 |
||
238 |
fun get_commands () = NAMED_CRITICAL "Isar" (fn () => ! global_commands); |
|
27501 | 239 |
|
27616 | 240 |
end; |
241 |
||
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242 |
fun add_edge (id1, id2) = |
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243 |
if id1 = no_id orelse id2 = no_id then I else Graph.add_edge (id1, id2); |
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244 |
|
27616 | 245 |
|
246 |
fun init_commands () = change_commands (K Graph.empty); |
|
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247 |
|
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248 |
fun the_command id = |
27524 | 249 |
let val Command cmd = |
250 |
if id = no_id then empty_command |
|
27616 | 251 |
else (Graph.get_node (get_commands ()) id handle Graph.UNDEF bad => err_undef bad) |
27524 | 252 |
in cmd end; |
27518 | 253 |
|
254 |
fun prev_command id = |
|
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255 |
if id = no_id then no_id |
27518 | 256 |
else |
27616 | 257 |
(case Graph.imm_preds (get_commands ()) id handle Graph.UNDEF bad => err_undef bad of |
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258 |
[] => no_id |
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259 |
| [prev] => prev |
27518 | 260 |
| _ => sys_error ("Non-linear command dependency " ^ quote id)); |
27501 | 261 |
|
27616 | 262 |
fun next_commands id = |
263 |
if id = no_id then [] |
|
264 |
else Graph.imm_succs (get_commands ()) id handle Graph.UNDEF bad => err_undef bad; |
|
265 |
||
266 |
fun descendant_commands ids = |
|
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267 |
Graph.all_succs (get_commands ()) (distinct (op =) (filter_out (fn id => id = no_id) ids)) |
27616 | 268 |
handle Graph.UNDEF bad => err_undef bad; |
269 |
||
270 |
||
271 |
(* maintain status *) |
|
272 |
||
273 |
fun report_status markup id = Toplevel.status (#transition (the_command id)) markup; |
|
274 |
||
27662 | 275 |
fun update_status status id = change_commands (Graph.map_node id (map_status (K status))); |
276 |
||
277 |
fun report_update_status status id = |
|
278 |
change_commands (Graph.map_node id (map_status (fn old_status => |
|
279 |
let val markup = status_markup status |
|
280 |
in if markup <> status_markup old_status then report_status markup id else (); status end))); |
|
27501 | 281 |
|
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282 |
|
27616 | 283 |
(* create and dispose commands *) |
27524 | 284 |
|
27616 | 285 |
fun create_command raw_tr = |
286 |
let |
|
29314 | 287 |
val (id, tr) = |
288 |
(case Toplevel.get_id raw_tr of |
|
289 |
SOME id => (id, raw_tr) |
|
290 |
| NONE => |
|
291 |
let val id = |
|
292 |
if ! Toplevel.debug then "isabelle:" ^ Toplevel.name_of raw_tr ^ serial_string () |
|
293 |
else "isabelle:" ^ serial_string () |
|
294 |
in (id, Toplevel.put_id id raw_tr) end); |
|
295 |
||
27616 | 296 |
val cmd = make_command (category_of tr, tr, Unprocessed); |
297 |
val _ = change_commands (Graph.new_node (id, cmd)); |
|
298 |
in id end; |
|
299 |
||
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300 |
fun dispose_commands ids = |
27616 | 301 |
let |
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302 |
val desc = descendant_commands ids; |
27616 | 303 |
val _ = List.app (report_status Markup.disposed) desc; |
304 |
val _ = change_commands (Graph.del_nodes desc); |
|
305 |
in () end; |
|
27606 | 306 |
|
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307 |
|
27616 | 308 |
(* final state *) |
27501 | 309 |
|
27616 | 310 |
fun the_state id = |
311 |
(case the_command id of |
|
312 |
{status = Finished state, ...} => state |
|
313 |
| {transition, ...} => error ("Unfinished command " ^ Toplevel.str_of transition)); |
|
27501 | 314 |
|
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315 |
|
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316 |
|
27616 | 317 |
(** editor model **) |
318 |
||
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319 |
(* run commands *) |
27616 | 320 |
|
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321 |
fun try_run id = |
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322 |
(case try the_state (prev_command id) of |
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323 |
NONE => () |
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324 |
| SOME state => |
27622 | 325 |
(case run true (#transition (the_command id)) state of |
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326 |
NONE => () |
27662 | 327 |
| SOME status => report_update_status status id)); |
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328 |
|
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329 |
fun rerun_commands ids = |
27662 | 330 |
(List.app (report_update_status Unprocessed) ids; List.app try_run ids); |
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|
332 |
||
333 |
(* modify document *) |
|
334 |
||
335 |
fun insert_command prev id = NAMED_CRITICAL "Isar" (fn () => |
|
336 |
let |
|
337 |
val nexts = next_commands prev; |
|
338 |
val _ = change_commands |
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339 |
(fold (fn next => Graph.del_edge (prev, next)) nexts #> add_edge (prev, id) #> |
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fold (fn next => Graph.add_edge (id, next)) nexts); |
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341 |
in descendant_commands [id] end) |> rerun_commands; |
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|
343 |
fun remove_command id = NAMED_CRITICAL "Isar" (fn () => |
|
344 |
let |
|
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val prev = prev_command id; |
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val nexts = next_commands id; |
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347 |
val _ = change_commands |
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348 |
(fold (fn next => Graph.del_edge (id, next)) nexts #> |
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349 |
fold (fn next => add_edge (prev, next)) nexts); |
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|
350 |
in descendant_commands nexts end) |> rerun_commands; |
27616 | 351 |
|
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changeset
|
352 |
|
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|
353 |
(* concrete syntax *) |
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|
354 |
|
111fc1879250
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parents:
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changeset
|
355 |
local |
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parents:
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changeset
|
356 |
|
29348
28b0652aabd8
simplified tty model -- back to plain list history, which is independent of editor model;
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changeset
|
357 |
structure P = OuterParse; |
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changeset
|
358 |
val op >> = Scan.>>; |
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parents:
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diff
changeset
|
359 |
|
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
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parents:
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diff
changeset
|
360 |
in |
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
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parents:
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diff
changeset
|
361 |
|
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
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parents:
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diff
changeset
|
362 |
val _ = |
29313 | 363 |
OuterSyntax.internal_command "Isar.command" |
364 |
(P.string -- P.string >> (fn (id, text) => |
|
365 |
Toplevel.imperative (fn () => |
|
366 |
ignore (create_command (OuterSyntax.prepare_command (Position.id id) text))))); |
|
28300
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
27662
diff
changeset
|
367 |
|
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
27662
diff
changeset
|
368 |
val _ = |
29313 | 369 |
OuterSyntax.internal_command "Isar.insert" |
28300
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
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parents:
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diff
changeset
|
370 |
(P.string -- P.string >> (fn (prev, id) => |
29313 | 371 |
Toplevel.imperative (fn () => insert_command prev id))); |
28300
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
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diff
changeset
|
372 |
|
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
27662
diff
changeset
|
373 |
val _ = |
29313 | 374 |
OuterSyntax.internal_command "Isar.remove" |
375 |
(P.string >> (fn id => Toplevel.imperative (fn () => remove_command id))); |
|
28300
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
27662
diff
changeset
|
376 |
|
26605
24e60e823d22
The global Isabelle/Isar state and main read-eval-print loop.
wenzelm
parents:
diff
changeset
|
377 |
end; |
24e60e823d22
The global Isabelle/Isar state and main read-eval-print loop.
wenzelm
parents:
diff
changeset
|
378 |
|
28300
111fc1879250
moved Isar editor commands from isar_syn.ML to isar.ML;
wenzelm
parents:
27662
diff
changeset
|
379 |
end; |