1/* Part of SWI-Prolog 2 3 Author: Jan Wielemaker 4 E-mail: J.Wielemaker@vu.nl 5 WWW: http://www.swi-prolog.org 6 Copyright (c) 1997-2024, University of Amsterdam 7 VU University Amsterdam 8 CWI, Amsterdam 9 SWI-Prolog Solutions b.v. 10 All rights reserved. 11 12 Redistribution and use in source and binary forms, with or without 13 modification, are permitted provided that the following conditions 14 are met: 15 16 1. Redistributions of source code must retain the above copyright 17 notice, this list of conditions and the following disclaimer. 18 19 2. Redistributions in binary form must reproduce the above copyright 20 notice, this list of conditions and the following disclaimer in 21 the documentation and/or other materials provided with the 22 distribution. 23 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 27 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 28 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 30 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 32 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 34 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 POSSIBILITY OF SUCH DAMAGE. 36*/ 37 38:- module('$messages', 39 [ print_message/2, % +Kind, +Term 40 print_message_lines/3, % +Stream, +Prefix, +Lines 41 message_to_string/2 % +Term, -String 42 ]). 43 44:- multifile 45 prolog:message//1, % entire message 46 prolog:error_message//1, % 1-st argument of error term 47 prolog:message_context//1, % Context of error messages 48 prolog:deprecated//1, % Deprecated features 49 prolog:message_location//1, % (File) location of error messages 50 prolog:message_line_element/2. % Extend printing 51:- '$hide'(( 52 prolog:message//1, 53 prolog:error_message//1, 54 prolog:message_context//1, 55 prolog:deprecated//1, 56 prolog:message_location//1, 57 prolog:message_line_element/2)). 58% Lang, Term versions 59:- multifile 60 prolog:message//2, % entire message 61 prolog:error_message//2, % 1-st argument of error term 62 prolog:message_context//2, % Context of error messages 63 prolog:message_location//2, % (File) location of error messages 64 prolog:deprecated//2. % Deprecated features 65:- '$hide'(( 66 prolog:message//2, 67 prolog:error_message//2, 68 prolog:message_context//2, 69 prolog:deprecated//2, 70 prolog:message_location//2)). 71 72:- discontiguous 73 prolog_message/3. 74 75:- public 76 translate_message//1, % +Message (deprecated) 77 prolog:translate_message//1. % +Message 78 79:- create_prolog_flag(message_context, [thread], []).
format(Fmt, Args)format(Fmt)
103prologtranslate_message(Term) -->
104 translate_message(Term).111translate_message(Term) --> 112 { nonvar(Term) }, 113 ( { message_lang(Lang) }, 114 prolog:message(Lang, Term) 115 ; prolog:message(Term) 116 ), 117 !. 118translate_message(Term) --> 119 { nonvar(Term) }, 120 translate_message2(Term), 121 !. 122translate_message(Term) --> 123 { nonvar(Term), 124 Term = error(_, _) 125 }, 126 [ 'Unknown exception: ~p'-[Term] ]. 127translate_message(Term) --> 128 [ 'Unknown message: ~p'-[Term] ]. 129 130translate_message2(Term) --> 131 prolog_message(Term). 132translate_message2(error(resource_error(stack), Context)) --> 133 !, 134 out_of_stack(Context). 135translate_message2(error(resource_error(tripwire(Wire, Context)), _)) --> 136 !, 137 tripwire_message(Wire, Context). 138translate_message2(error(existence_error(reset, Ball), SWI)) --> 139 swi_location(SWI), 140 tabling_existence_error(Ball, SWI). 141translate_message2(error(ISO, SWI)) --> 142 swi_location(SWI), 143 term_message(ISO), 144 swi_extra(SWI). 145translate_message2('$aborted') --> 146 [ 'Execution Aborted' ]. 147translate_message2(message_lines(Lines), L, T) :- % deal with old C-warning() 148 make_message_lines(Lines, L, T). 149translate_message2(format(Fmt, Args)) --> 150 [ Fmt-Args ]. 151 152make_message_lines([], T, T) :- !. 153make_message_lines([Last], ['~w'-[Last]|T], T) :- !. 154make_message_lines([L0|LT], ['~w'-[L0],nl|T0], T) :- 155 make_message_lines(LT, T0, T).
error(Format, ImplDefined)
exception terms. The ImplDefined argument is handled by
swi_location//2.163:- public term_message//1. 164term_message(Term) --> 165 {var(Term)}, 166 !, 167 [ 'Unknown error term: ~p'-[Term] ]. 168term_message(Term) --> 169 { message_lang(Lang) }, 170 prolog:error_message(Lang, Term), 171 !. 172term_message(Term) --> 173 prolog:error_message(Term), 174 !. 175term_message(Term) --> 176 iso_message(Term). 177term_message(Term) --> 178 swi_message(Term). 179term_message(Term) --> 180 [ 'Unknown error term: ~p'-[Term] ]. 181 182iso_message(resource_error(c_stack)) --> 183 out_of_c_stack. 184iso_message(resource_error(Missing)) --> 185 [ 'Not enough resources: ~w'-[Missing] ]. 186iso_message(type_error(evaluable, Actual)) --> 187 { callable(Actual) }, 188 [ 'Arithmetic: `~p'' is not a function'-[Actual] ]. 189iso_message(type_error(free_of_attvar, Actual)) --> 190 [ 'Type error: `~W'' contains attributed variables'- 191 [Actual,[portray(true), attributes(portray)]] ]. 192iso_message(type_error(Expected, Actual)) --> 193 [ 'Type error: `~w'' expected, found `~p'''-[Expected, Actual] ], 194 type_error_comment(Expected, Actual). 195iso_message(domain_error(Domain, Actual)) --> 196 [ 'Domain error: '-[] ], domain(Domain), 197 [ ' expected, found `~p'''-[Actual] ]. 198iso_message(instantiation_error) --> 199 [ 'Arguments are not sufficiently instantiated' ]. 200iso_message(uninstantiation_error(Var)) --> 201 [ 'Uninstantiated argument expected, found ~p'-[Var] ]. 202iso_message(representation_error(What)) --> 203 [ 'Cannot represent due to `~w'''-[What] ]. 204iso_message(permission_error(Action, Type, Object)) --> 205 permission_error(Action, Type, Object). 206iso_message(evaluation_error(Which)) --> 207 [ 'Arithmetic: evaluation error: `~p'''-[Which] ]. 208iso_message(existence_error(procedure, Proc)) --> 209 [ 'Unknown procedure: ~q'-[Proc] ], 210 unknown_proc_msg(Proc). 211iso_message(existence_error(answer_variable, Var)) --> 212 [ '$~w was not bound by a previous query'-[Var] ]. 213iso_message(existence_error(matching_rule, Goal)) --> 214 [ 'No rule matches ~p'-[Goal] ]. 215iso_message(existence_error(Type, Object)) --> 216 [ '~w `~p'' does not exist'-[Type, Object] ]. 217iso_message(existence_error(export, PI, module(M))) --> % not ISO 218 [ 'Module ', ansi(code, '~q', [M]), ' does not export ', 219 ansi(code, '~q', [PI]) ]. 220iso_message(existence_error(Type, Object, In)) --> % not ISO 221 [ '~w `~p'' does not exist in ~p'-[Type, Object, In] ]. 222iso_message(busy(Type, Object)) --> 223 [ '~w `~p'' is busy'-[Type, Object] ]. 224iso_message(syntax_error(swi_backslash_newline)) --> 225 [ 'Deprecated ... \\<newline><white>*. Use \\c' ]. 226iso_message(syntax_error(Id)) --> 227 [ 'Syntax error: ' ], 228 syntax_error(Id). 229iso_message(occurs_check(Var, In)) --> 230 [ 'Cannot unify ~p with ~p: would create an infinite tree'-[Var, In] ].
237permission_error(Action, built_in_procedure, Pred) --> 238 { user_predicate_indicator(Pred, PI) 239 }, 240 [ 'No permission to ~w built-in predicate `~p'''-[Action, PI] ], 241 ( {Action \== export} 242 -> [ nl, 243 'Use :- redefine_system_predicate(+Head) if redefinition is intended' 244 ] 245 ; [] 246 ). 247permission_error(import_into(Dest), procedure, Pred) --> 248 [ 'No permission to import ~p into ~w'-[Pred, Dest] ]. 249permission_error(Action, static_procedure, Proc) --> 250 [ 'No permission to ~w static procedure `~p'''-[Action, Proc] ], 251 defined_definition('Defined', Proc). 252permission_error(input, stream, Stream) --> 253 [ 'No permission to read from output stream `~p'''-[Stream] ]. 254permission_error(output, stream, Stream) --> 255 [ 'No permission to write to input stream `~p'''-[Stream] ]. 256permission_error(input, text_stream, Stream) --> 257 [ 'No permission to read bytes from TEXT stream `~p'''-[Stream] ]. 258permission_error(output, text_stream, Stream) --> 259 [ 'No permission to write bytes to TEXT stream `~p'''-[Stream] ]. 260permission_error(input, binary_stream, Stream) --> 261 [ 'No permission to read characters from binary stream `~p'''-[Stream] ]. 262permission_error(output, binary_stream, Stream) --> 263 [ 'No permission to write characters to binary stream `~p'''-[Stream] ]. 264permission_error(open, source_sink, alias(Alias)) --> 265 [ 'No permission to reuse alias "~p": already taken'-[Alias] ]. 266permission_error(tnot, non_tabled_procedure, Pred) --> 267 [ 'The argument of tnot/1 is not tabled: ~p'-[Pred] ]. 268permission_error(assert, procedure, Pred) --> 269 { '$pi_head'(Pred, Head), 270 predicate_property(Head, ssu) 271 }, 272 [ '~p: an SSU (Head => Body) predicate cannot have normal Prolog clauses'- 273 [Pred] ]. 274permission_error(Action, Type, Object) --> 275 [ 'No permission to ~w ~w `~p'''-[Action, Type, Object] ]. 276 277 278unknown_proc_msg(_:(^)/2) --> 279 !, 280 unknown_proc_msg((^)/2). 281unknown_proc_msg((^)/2) --> 282 !, 283 [nl, ' ^/2 can only appear as the 2nd argument of setof/3 and bagof/3']. 284unknown_proc_msg((:-)/2) --> 285 !, 286 [nl, ' Rules must be loaded from a file'], 287 faq('ToplevelMode'). 288unknown_proc_msg((=>)/2) --> 289 !, 290 [nl, ' Rules must be loaded from a file'], 291 faq('ToplevelMode'). 292unknown_proc_msg((:-)/1) --> 293 !, 294 [nl, ' Directives must be loaded from a file'], 295 faq('ToplevelMode'). 296unknown_proc_msg((?-)/1) --> 297 !, 298 [nl, ' ?- is the Prolog prompt'], 299 faq('ToplevelMode'). 300unknown_proc_msg(Proc) --> 301 { dwim_predicates(Proc, Dwims) }, 302 ( {Dwims \== []} 303 -> [nl, ' However, there are definitions for:', nl], 304 dwim_message(Dwims) 305 ; [] 306 ). 307 308dependency_error(shared(Shared), private(Private)) --> 309 [ 'Shared table for ~p may not depend on private ~p'-[Shared, Private] ]. 310dependency_error(Dep, monotonic(On)) --> 311 { '$pi_head'(PI, Dep), 312 '$pi_head'(MPI, On) 313 }, 314 [ 'Dependent ~p on monotonic predicate ~p is not monotonic or incremental'- 315 [PI, MPI] 316 ]. 317 318faq(Page) --> 319 [nl, ' See FAQ at https://www.swi-prolog.org/FAQ/', Page, '.txt' ]. 320 321type_error_comment(_Expected, Actual) --> 322 { type_of(Actual, Type), 323 ( sub_atom(Type, 0, 1, _, First), 324 memberchk(First, [a,e,i,o,u]) 325 -> Article = an 326 ; Article = a 327 ) 328 }, 329 [ ' (~w ~w)'-[Article, Type] ]. 330 331type_of(Term, Type) :- 332 ( attvar(Term) -> Type = attvar 333 ; var(Term) -> Type = var 334 ; atom(Term) -> Type = atom 335 ; integer(Term) -> Type = integer 336 ; string(Term) -> Type = string 337 ; Term == [] -> Type = empty_list 338 ; blob(Term, BlobT) -> blob_type(BlobT, Type) 339 ; rational(Term) -> Type = rational 340 ; float(Term) -> Type = float 341 ; is_stream(Term) -> Type = stream 342 ; is_dict(Term) -> Type = dict 343 ; is_list(Term) -> Type = list 344 ; cyclic_term(Term) -> Type = cyclic 345 ; compound(Term) -> Type = compound 346 ; Type = unknown 347 ). 348 349blob_type(BlobT, Type) :- 350 atom_concat(BlobT, '_reference', Type). 351 352syntax_error(end_of_clause) --> 353 [ 'Unexpected end of clause' ]. 354syntax_error(end_of_clause_expected) --> 355 [ 'End of clause expected' ]. 356syntax_error(end_of_file) --> 357 [ 'Unexpected end of file' ]. 358syntax_error(end_of_file_in_block_comment) --> 359 [ 'End of file in /* ... */ comment' ]. 360syntax_error(end_of_file_in_quoted(Quote)) --> 361 [ 'End of file in quoted ' ], 362 quoted_type(Quote). 363syntax_error(illegal_number) --> 364 [ 'Illegal number' ]. 365syntax_error(long_atom) --> 366 [ 'Atom too long (see style_check/1)' ]. 367syntax_error(long_string) --> 368 [ 'String too long (see style_check/1)' ]. 369syntax_error(operator_clash) --> 370 [ 'Operator priority clash' ]. 371syntax_error(operator_expected) --> 372 [ 'Operator expected' ]. 373syntax_error(operator_balance) --> 374 [ 'Unbalanced operator' ]. 375syntax_error(quoted_punctuation) --> 376 [ 'Operand expected, unquoted comma or bar found' ]. 377syntax_error(list_rest) --> 378 [ 'Unexpected comma or bar in rest of list' ]. 379syntax_error(cannot_start_term) --> 380 [ 'Illegal start of term' ]. 381syntax_error(punct(Punct, End)) --> 382 [ 'Unexpected `~w\' before `~w\''-[Punct, End] ]. 383syntax_error(undefined_char_escape(C)) --> 384 [ 'Unknown character escape in quoted atom or string: `\\~w\''-[C] ]. 385syntax_error(void_not_allowed) --> 386 [ 'Empty argument list "()"' ]. 387syntax_error(Message) --> 388 [ '~w'-[Message] ]. 389 390quoted_type('\'') --> [atom]. 391quoted_type('\"') --> { current_prolog_flag(double_quotes, Type) }, [Type-[]]. 392quoted_type('\`') --> { current_prolog_flag(back_quotes, Type) }, [Type-[]]. 393 394domain(range(Low,High)) --> 395 !, 396 ['[~q..~q]'-[Low,High] ]. 397domain(Domain) --> 398 ['`~w\''-[Domain] ].
405tabling_existence_error(Ball, Context) --> 406 { table_shift_ball(Ball) }, 407 [ 'Tabling dependency error' ], 408 swi_extra(Context). 409 410table_shift_ball(dependency(_Head)). 411table_shift_ball(dependency(_Skeleton, _Trie, _Mono)). 412table_shift_ball(call_info(_Skeleton, _Status)). 413table_shift_ball(call_info(_GenSkeleton, _Skeleton, _Status)).
419dwim_predicates(Module:Name/_Arity, Dwims) :- 420 !, 421 findall(Dwim, dwim_predicate(Module:Name, Dwim), Dwims). 422dwim_predicates(Name/_Arity, Dwims) :- 423 findall(Dwim, dwim_predicate(user:Name, Dwim), Dwims). 424 425dwim_message([]) --> []. 426dwim_message([M:Head|T]) --> 427 { hidden_module(M), 428 !, 429 functor(Head, Name, Arity) 430 }, 431 [ ' ~q'-[Name/Arity], nl ], 432 dwim_message(T). 433dwim_message([Module:Head|T]) --> 434 !, 435 { functor(Head, Name, Arity) 436 }, 437 [ ' ~q'-[Module:Name/Arity], nl], 438 dwim_message(T). 439dwim_message([Head|T]) --> 440 {functor(Head, Name, Arity)}, 441 [ ' ~q'-[Name/Arity], nl], 442 dwim_message(T). 443 444 445swi_message(io_error(Op, Stream)) --> 446 [ 'I/O error in ~w on stream ~p'-[Op, Stream] ]. 447swi_message(thread_error(TID, false)) --> 448 [ 'Thread ~p died due to failure:'-[TID] ]. 449swi_message(thread_error(TID, exception(Error))) --> 450 [ 'Thread ~p died abnormally:'-[TID], nl ], 451 translate_message(Error). 452swi_message(dependency_error(Tabled, DependsOn)) --> 453 dependency_error(Tabled, DependsOn). 454swi_message(shell(execute, Cmd)) --> 455 [ 'Could not execute `~w'''-[Cmd] ]. 456swi_message(shell(signal(Sig), Cmd)) --> 457 [ 'Caught signal ~d on `~w'''-[Sig, Cmd] ]. 458swi_message(format(Fmt, Args)) --> 459 [ Fmt-Args ]. 460swi_message(signal(Name, Num)) --> 461 [ 'Caught signal ~d (~w)'-[Num, Name] ]. 462swi_message(limit_exceeded(Limit, MaxVal)) --> 463 [ 'Exceeded ~w limit (~w)'-[Limit, MaxVal] ]. 464swi_message(goal_failed(Goal)) --> 465 [ 'goal unexpectedly failed: ~p'-[Goal] ]. 466swi_message(shared_object(_Action, Message)) --> % Message = dlerror() 467 [ '~w'-[Message] ]. 468swi_message(system_error(Error)) --> 469 [ 'error in system call: ~w'-[Error] 470 ]. 471swi_message(system_error) --> 472 [ 'error in system call' 473 ]. 474swi_message(failure_error(Goal)) --> 475 [ 'Goal failed: ~p'-[Goal] ]. 476swi_message(timeout_error(Op, Stream)) --> 477 [ 'Timeout in ~w from ~p'-[Op, Stream] ]. 478swi_message(not_implemented(Type, What)) --> 479 [ '~w `~p\' is not implemented in this version'-[Type, What] ]. 480swi_message(context_error(nodirective, Goal)) --> 481 { goal_to_predicate_indicator(Goal, PI) }, 482 [ 'Wrong context: ~p can only be used in a directive'-[PI] ]. 483swi_message(context_error(edit, no_default_file)) --> 484 ( { current_prolog_flag(windows, true) } 485 -> [ 'Edit/0 can only be used after opening a \c 486 Prolog file by double-clicking it' ] 487 ; [ 'Edit/0 can only be used with the "-s file" commandline option' 488 ] 489 ), 490 [ nl, 'Use "?- edit(Topic)." or "?- emacs."' ]. 491swi_message(context_error(function, meta_arg(S))) --> 492 [ 'Functions are not (yet) supported for meta-arguments of type ~q'-[S] ]. 493swi_message(format_argument_type(Fmt, Arg)) --> 494 [ 'Illegal argument to format sequence ~~~w: ~p'-[Fmt, Arg] ]. 495swi_message(format(Msg)) --> 496 [ 'Format error: ~w'-[Msg] ]. 497swi_message(conditional_compilation_error(unterminated, File:Line)) --> 498 [ 'Unterminated conditional compilation from '-[], url(File:Line) ]. 499swi_message(conditional_compilation_error(no_if, What)) --> 500 [ ':- ~w without :- if'-[What] ]. 501swi_message(duplicate_key(Key)) --> 502 [ 'Duplicate key: ~p'-[Key] ]. 503swi_message(initialization_error(failed, Goal, File:Line)) --> 504 !, 505 [ url(File:Line), ': ~p: false'-[Goal] ]. 506swi_message(initialization_error(Error, Goal, File:Line)) --> 507 [ url(File:Line), ': ~p '-[Goal] ], 508 translate_message(Error). 509swi_message(determinism_error(PI, det, Found, property)) --> 510 ( { '$pi_head'(user:PI, Head), 511 predicate_property(Head, det) 512 } 513 -> [ 'Deterministic procedure ~p'-[PI] ] 514 ; [ 'Procedure ~p called from a deterministic procedure'-[PI] ] 515 ), 516 det_error(Found). 517swi_message(determinism_error(PI, det, fail, guard)) --> 518 [ 'Procedure ~p failed after $-guard'-[PI] ]. 519swi_message(determinism_error(PI, det, fail, guard_in_caller)) --> 520 [ 'Procedure ~p failed after $-guard in caller'-[PI] ]. 521swi_message(determinism_error(Goal, det, fail, goal)) --> 522 [ 'Goal ~p failed'-[Goal] ]. 523swi_message(determinism_error(Goal, det, nondet, goal)) --> 524 [ 'Goal ~p succeeded with a choice point'-[Goal] ]. 525swi_message(qlf_format_error(File, Message)) --> 526 [ '~w: Invalid QLF file: ~w'-[File, Message] ]. 527swi_message(goal_expansion_error(bound, Term)) --> 528 [ 'Goal expansion bound a variable to ~p'-[Term] ]. 529 530det_error(nondet) --> 531 [ ' succeeded with a choicepoint'- [] ]. 532det_error(fail) --> 533 [ ' failed'- [] ].
error(Formal, ImplDefined) from the
ImplDefined term.541:- public swi_location//1. 542swi_location(X) --> 543 { var(X) }, 544 !. 545swi_location(Context) --> 546 { message_lang(Lang) }, 547 prolog:message_location(Lang, Context), 548 !. 549swi_location(Context) --> 550 prolog:message_location(Context), 551 !. 552swi_location(context(Caller, _Msg)) --> 553 { ground(Caller) }, 554 !, 555 caller(Caller). 556swi_location(file(Path, Line, -1, _CharNo)) --> 557 !, 558 [ url(Path:Line), ': ' ]. 559swi_location(file(Path, Line, LinePos, _CharNo)) --> 560 [ url(Path:Line:LinePos), ': ' ]. 561swi_location(stream(Stream, Line, LinePos, CharNo)) --> 562 ( { is_stream(Stream), 563 stream_property(Stream, file_name(File)) 564 } 565 -> swi_location(file(File, Line, LinePos, CharNo)) 566 ; [ 'Stream ~w:~d:~d '-[Stream, Line, LinePos] ] 567 ). 568swi_location(autoload(File:Line)) --> 569 [ url(File:Line), ': ' ]. 570swi_location(_) --> 571 []. 572 573caller(system:'$record_clause'/3) --> 574 !, 575 []. 576caller(Module:Name/Arity) --> 577 !, 578 ( { \+ hidden_module(Module) } 579 -> [ '~q:~q/~w: '-[Module, Name, Arity] ] 580 ; [ '~q/~w: '-[Name, Arity] ] 581 ). 582caller(Name/Arity) --> 583 [ '~q/~w: '-[Name, Arity] ]. 584caller(Caller) --> 585 [ '~p: '-[Caller] ].
error(Formal,
ImplDefined) that is printed after the core of the message.
596swi_extra(X) --> 597 { var(X) }, 598 !, 599 []. 600swi_extra(Context) --> 601 { message_lang(Lang) }, 602 prolog:message_context(Lang, Context), 603 !. 604swi_extra(Context) --> 605 prolog:message_context(Context). 606swi_extra(context(_, Msg)) --> 607 { nonvar(Msg), 608 Msg \== '' 609 }, 610 !, 611 swi_comment(Msg). 612swi_extra(string(String, CharPos)) --> 613 { sub_string(String, 0, CharPos, _, Before), 614 sub_string(String, CharPos, _, 0, After) 615 }, 616 [ nl, '~w'-[Before], nl, '** here **', nl, '~w'-[After] ]. 617swi_extra(_) --> 618 []. 619 620swi_comment(already_from(Module)) --> 621 !, 622 [ ' (already imported from ~q)'-[Module] ]. 623swi_comment(directory(_Dir)) --> 624 !, 625 [ ' (is a directory)' ]. 626swi_comment(not_a_directory(_Dir)) --> 627 !, 628 [ ' (is not a directory)' ]. 629swi_comment(Msg) --> 630 [ ' (~w)'-[Msg] ]. 631 632 633thread_context --> 634 { thread_self(Me), Me \== main, thread_property(Me, id(Id)) }, 635 !, 636 ['[Thread ~w] '-[Id]]. 637thread_context --> 638 []. 639 640 /******************************* 641 * NORMAL MESSAGES * 642 *******************************/ 643 644prolog_message(welcome) --> 645 [ 'Welcome to SWI-Prolog (' ], 646 prolog_message(threads), 647 prolog_message(address_bits), 648 ['version ' ], 649 prolog_message(version), 650 [ ')', nl ], 651 prolog_message(copyright), 652 [ nl ], 653 translate_message(user_versions), 654 [ nl ], 655 prolog_message(documentaton), 656 [ nl, nl ]. 657prolog_message(user_versions) --> 658 ( { findall(Msg, prolog:version_msg(Msg), Msgs), 659 Msgs \== [] 660 } 661 -> [nl], 662 user_version_messages(Msgs) 663 ; [] 664 ). 665prolog_message(deprecated(Term)) --> 666 { nonvar(Term) }, 667 ( { message_lang(Lang) }, 668 prolog:deprecated(Lang, Term) 669 -> [] 670 ; prolog:deprecated(Term) 671 -> [] 672 ; deprecated(Term) 673 ). 674prolog_message(unhandled_exception(E)) --> 675 { nonvar(E) }, 676 [ 'Unhandled exception: ' ], 677 ( translate_message(E) 678 -> [] 679 ; [ '~p'-[E] ] 680 ).
684prolog_message(initialization_error(_, E, File:Line)) --> 685 !, 686 [ url(File:Line), 687 ': Initialization goal raised exception:', nl 688 ], 689 translate_message(E). 690prolog_message(initialization_error(Goal, E, _)) --> 691 [ 'Initialization goal ~p raised exception:'-[Goal], nl ], 692 translate_message(E). 693prolog_message(initialization_failure(_Goal, File:Line)) --> 694 !, 695 [ url(File:Line), 696 ': Initialization goal failed'-[] 697 ]. 698prolog_message(initialization_failure(Goal, _)) --> 699 [ 'Initialization goal failed: ~p'-[Goal] 700 ]. 701prolog_message(initialization_exception(E)) --> 702 [ 'Prolog initialisation failed:', nl ], 703 translate_message(E). 704prolog_message(init_goal_syntax(Error, Text)) --> 705 !, 706 [ '-g ~w: '-[Text] ], 707 translate_message(Error). 708prolog_message(init_goal_failed(failed, @(Goal,File:Line))) --> 709 !, 710 [ url(File:Line), ': ~p: false'-[Goal] ]. 711prolog_message(init_goal_failed(Error, @(Goal,File:Line))) --> 712 !, 713 [ url(File:Line), ': ~p '-[Goal] ], 714 translate_message(Error). 715prolog_message(init_goal_failed(failed, Text)) --> 716 !, 717 [ '-g ~w: false'-[Text] ]. 718prolog_message(init_goal_failed(Error, Text)) --> 719 !, 720 [ '-g ~w: '-[Text] ], 721 translate_message(Error). 722prolog_message(goal_failed(Context, Goal)) --> 723 [ 'Goal (~w) failed: ~p'-[Context, Goal] ]. 724prolog_message(no_current_module(Module)) --> 725 [ '~w is not a current module (created)'-[Module] ]. 726prolog_message(commandline_arg_type(Flag, Arg)) --> 727 [ 'Bad argument to commandline option -~w: ~w'-[Flag, Arg] ]. 728prolog_message(missing_feature(Name)) --> 729 [ 'This version of SWI-Prolog does not support ~w'-[Name] ]. 730prolog_message(singletons(_Term, List)) --> 731 [ 'Singleton variables: ~w'-[List] ]. 732prolog_message(multitons(_Term, List)) --> 733 [ 'Singleton-marked variables appearing more than once: ~w'-[List] ]. 734prolog_message(profile_no_cpu_time) --> 735 [ 'No CPU-time info. Check the SWI-Prolog manual for details' ]. 736prolog_message(non_ascii(Text, Type)) --> 737 [ 'Unquoted ~w with non-portable characters: ~w'-[Type, Text] ]. 738prolog_message(io_warning(Stream, Message)) --> 739 { stream_property(Stream, position(Position)), 740 !, 741 stream_position_data(line_count, Position, LineNo), 742 stream_position_data(line_position, Position, LinePos), 743 ( stream_property(Stream, file_name(File)) 744 -> Obj = File 745 ; Obj = Stream 746 ) 747 }, 748 [ '~p:~d:~d: ~w'-[Obj, LineNo, LinePos, Message] ]. 749prolog_message(io_warning(Stream, Message)) --> 750 [ 'stream ~p: ~w'-[Stream, Message] ]. 751prolog_message(option_usage(pldoc)) --> 752 [ 'Usage: --pldoc[=port]' ]. 753prolog_message(interrupt(begin)) --> 754 [ 'Action (h for help) ? ', flush ]. 755prolog_message(interrupt(end)) --> 756 [ 'continue' ]. 757prolog_message(interrupt(trace)) --> 758 [ 'continue (trace mode)' ]. 759prolog_message(unknown_in_module_user) --> 760 [ 'Using a non-error value for unknown in the global module', nl, 761 'causes most of the development environment to stop working.', nl, 762 'Please use :- dynamic or limit usage of unknown to a module.', nl, 763 'See https://www.swi-prolog.org/howto/database.html' 764 ]. 765prolog_message(untable(PI)) --> 766 [ 'Reconsult: removed tabling for ~p'-[PI] ]. 767 768 769 /******************************* 770 * LOADING FILES * 771 *******************************/ 772 773prolog_message(modify_active_procedure(Who, What)) --> 774 [ '~p: modified active procedure ~p'-[Who, What] ]. 775prolog_message(load_file(failed(user:File))) --> 776 [ 'Failed to load ~p'-[File] ]. 777prolog_message(load_file(failed(Module:File))) --> 778 [ 'Failed to load ~p into module ~p'-[File, Module] ]. 779prolog_message(load_file(failed(File))) --> 780 [ 'Failed to load ~p'-[File] ]. 781prolog_message(mixed_directive(Goal)) --> 782 [ 'Cannot pre-compile mixed load/call directive: ~p'-[Goal] ]. 783prolog_message(cannot_redefine_comma) --> 784 [ 'Full stop in clause-body? Cannot redefine ,/2' ]. 785prolog_message(illegal_autoload_index(Dir, Term)) --> 786 [ 'Illegal term in INDEX file of directory ~w: ~w'-[Dir, Term] ]. 787prolog_message(redefined_procedure(Type, Proc)) --> 788 [ 'Redefined ~w procedure ~p'-[Type, Proc] ], 789 defined_definition('Previously defined', Proc). 790prolog_message(declare_module(Module, abolish(Predicates))) --> 791 [ 'Loading module ~w abolished: ~p'-[Module, Predicates] ]. 792prolog_message(import_private(Module, Private)) --> 793 [ 'import/1: ~p is not exported (still imported into ~q)'- 794 [Private, Module] 795 ]. 796prolog_message(ignored_weak_import(Into, From:PI)) --> 797 [ 'Local definition of ~p overrides weak import from ~q'- 798 [Into:PI, From] 799 ]. 800prolog_message(undefined_export(Module, PI)) --> 801 [ 'Exported procedure ~q:~q is not defined'-[Module, PI] ]. 802prolog_message(no_exported_op(Module, Op)) --> 803 [ 'Operator ~q:~q is not exported (still defined)'-[Module, Op] ]. 804prolog_message(discontiguous((-)/2,_)) --> 805 prolog_message(minus_in_identifier). 806prolog_message(discontiguous(Proc,Current)) --> 807 [ 'Clauses of ', ansi(code, '~p', [Proc]), 808 ' are not together in the source-file', nl ], 809 current_definition(Proc, 'Earlier definition at '), 810 [ 'Current predicate: ', ansi(code, '~p', [Current]), nl, 811 'Use ', ansi(code, ':- discontiguous ~p.', [Proc]), 812 ' to suppress this message' 813 ]. 814prolog_message(decl_no_effect(Goal)) --> 815 [ 'Deprecated declaration has no effect: ~p'-[Goal] ]. 816prolog_message(load_file(start(Level, File))) --> 817 [ '~|~t~*+Loading '-[Level] ], 818 load_file(File), 819 [ ' ...' ]. 820prolog_message(include_file(start(Level, File))) --> 821 [ '~|~t~*+include '-[Level] ], 822 load_file(File), 823 [ ' ...' ]. 824prolog_message(include_file(done(Level, File))) --> 825 [ '~|~t~*+included '-[Level] ], 826 load_file(File). 827prolog_message(load_file(done(Level, File, Action, Module, Time, Clauses))) --> 828 [ '~|~t~*+'-[Level] ], 829 load_file(File), 830 [ ' ~w'-[Action] ], 831 load_module(Module), 832 [ ' ~2f sec, ~D clauses'-[Time, Clauses] ]. 833prolog_message(dwim_undefined(Goal, Alternatives)) --> 834 { goal_to_predicate_indicator(Goal, Pred) 835 }, 836 [ 'Unknown procedure: ~q'-[Pred], nl, 837 ' However, there are definitions for:', nl 838 ], 839 dwim_message(Alternatives). 840prolog_message(dwim_correct(Into)) --> 841 [ 'Correct to: ~q? '-[Into], flush ]. 842prolog_message(error(loop_error(Spec), file_search(Used))) --> 843 [ 'File search: too many levels of indirections on: ~p'-[Spec], nl, 844 ' Used alias expansions:', nl 845 ], 846 used_search(Used). 847prolog_message(minus_in_identifier) --> 848 [ 'The "-" character should not be used to separate words in an', nl, 849 'identifier. Check the SWI-Prolog FAQ for details.' 850 ]. 851prolog_message(qlf(removed_after_error(File))) --> 852 [ 'Removed incomplete QLF file ~w'-[File] ]. 853prolog_message(qlf(recompile(Spec,_Pl,_Qlf,Reason))) --> 854 [ '~p: recompiling QLF file'-[Spec] ], 855 qlf_recompile_reason(Reason). 856prolog_message(qlf(can_not_recompile(Spec,QlfFile,_Reason))) --> 857 [ '~p: can not recompile "~w" (access denied)'-[Spec, QlfFile], nl, 858 '\tLoading from source'-[] 859 ]. 860prolog_message(qlf(system_lib_out_of_date(Spec,QlfFile))) --> 861 [ '~p: can not recompile "~w" (access denied)'-[Spec, QlfFile], nl, 862 '\tLoading QlfFile'-[] 863 ]. 864prolog_message(redefine_module(Module, OldFile, File)) --> 865 [ 'Module "~q" already loaded from ~w.'-[Module, OldFile], nl, 866 'Wipe and reload from ~w? '-[File], flush 867 ]. 868prolog_message(redefine_module_reply) --> 869 [ 'Please answer y(es), n(o) or a(bort)' ]. 870prolog_message(reloaded_in_module(Absolute, OldContext, LM)) --> 871 [ '~w was previously loaded in module ~w'-[Absolute, OldContext], nl, 872 '\tnow it is reloaded into module ~w'-[LM] ]. 873prolog_message(expected_layout(Expected, Pos)) --> 874 [ 'Layout data: expected ~w, found: ~p'-[Expected, Pos] ]. 875 876defined_definition(Message, Spec) --> 877 { strip_module(user:Spec, M, Name/Arity), 878 functor(Head, Name, Arity), 879 predicate_property(M:Head, file(File)), 880 predicate_property(M:Head, line_count(Line)) 881 }, 882 !, 883 [ nl, '~w at '-[Message], url(File:Line) ]. 884defined_definition(_, _) --> []. 885 886used_search([]) --> 887 []. 888used_search([Alias=Expanded|T]) --> 889 [ ' file_search_path(~p, ~p)'-[Alias, Expanded], nl ], 890 used_search(T). 891 892load_file(file(Spec, _Path)) --> 893 ( {atomic(Spec)} 894 -> [ '~w'-[Spec] ] 895 ; [ '~p'-[Spec] ] 896 ). 897%load_file(file(_, Path)) --> 898% [ '~w'-[Path] ]. 899 900load_module(user) --> !. 901load_module(system) --> !. 902load_module(Module) --> 903 [ ' into ~w'-[Module] ]. 904 905goal_to_predicate_indicator(Goal, PI) :- 906 strip_module(Goal, Module, Head), 907 callable_name_arity(Head, Name, Arity), 908 user_predicate_indicator(Module:Name/Arity, PI). 909 910callable_name_arity(Goal, Name, Arity) :- 911 compound(Goal), 912 !, 913 compound_name_arity(Goal, Name, Arity). 914callable_name_arity(Goal, Goal, 0) :- 915 atom(Goal). 916 917user_predicate_indicator(Module:PI, PI) :- 918 hidden_module(Module), 919 !. 920user_predicate_indicator(PI, PI). 921 (user) :- !. 923hidden_module(system) :- !. 924hidden_module(M) :- 925 sub_atom(M, 0, _, _, $). 926 927current_definition(Proc, Prefix) --> 928 { pi_uhead(Proc, Head), 929 predicate_property(Head, file(File)), 930 predicate_property(Head, line_count(Line)) 931 }, 932 [ '~w'-[Prefix], url(File:Line), nl ]. 933current_definition(_, _) --> []. 934 935pi_uhead(Module:Name/Arity, Module:Head) :- 936 !, 937 atom(Module), atom(Name), integer(Arity), 938 functor(Head, Name, Arity). 939pi_uhead(Name/Arity, user:Head) :- 940 atom(Name), integer(Arity), 941 functor(Head, Name, Arity). 942 943qlf_recompile_reason(old) --> 944 !, 945 [ ' (out of date)'-[] ]. 946qlf_recompile_reason(_) --> 947 [ ' (incompatible with current Prolog version)'-[] ]. 948 949prolog_message(file_search(cache(Spec, _Cond), Path)) --> 950 [ 'File search: ~p --> ~p (cache)'-[Spec, Path] ]. 951prolog_message(file_search(found(Spec, Cond), Path)) --> 952 [ 'File search: ~p --> ~p OK ~p'-[Spec, Path, Cond] ]. 953prolog_message(file_search(tried(Spec, Cond), Path)) --> 954 [ 'File search: ~p --> ~p NO ~p'-[Spec, Path, Cond] ]. 955 956 /******************************* 957 * GC * 958 *******************************/ 959 960prolog_message(agc(start)) --> 961 thread_context, 962 [ 'AGC: ', flush ]. 963prolog_message(agc(done(Collected, Remaining, Time))) --> 964 [ at_same_line, 965 'reclaimed ~D atoms in ~3f sec. (remaining: ~D)'- 966 [Collected, Time, Remaining] 967 ]. 968prolog_message(cgc(start)) --> 969 thread_context, 970 [ 'CGC: ', flush ]. 971prolog_message(cgc(done(CollectedClauses, _CollectedBytes, 972 RemainingBytes, Time))) --> 973 [ at_same_line, 974 'reclaimed ~D clauses in ~3f sec. (pending: ~D bytes)'- 975 [CollectedClauses, Time, RemainingBytes] 976 ]. 977 978 /******************************* 979 * STACK OVERFLOW * 980 *******************************/ 981 982out_of_stack(Context) --> 983 { human_stack_size(Context.localused, Local), 984 human_stack_size(Context.globalused, Global), 985 human_stack_size(Context.trailused, Trail), 986 human_stack_size(Context.stack_limit, Limit), 987 LCO is (100*(Context.depth - Context.environments))/Context.depth 988 }, 989 [ 'Stack limit (~s) exceeded'-[Limit], nl, 990 ' Stack sizes: local: ~s, global: ~s, trail: ~s'-[Local,Global,Trail], nl, 991 ' Stack depth: ~D, last-call: ~0f%, Choice points: ~D'- 992 [Context.depth, LCO, Context.choicepoints], nl 993 ], 994 overflow_reason(Context, Resolve), 995 resolve_overflow(Resolve). 996 997human_stack_size(Size, String) :- 998 Size < 100, 999 format(string(String), '~dKb', [Size]). 1000human_stack_size(Size, String) :- 1001 Size < 100 000, 1002 Value is Size / 1024, 1003 format(string(String), '~1fMb', [Value]). 1004human_stack_size(Size, String) :- 1005 Value is Size / (1024*1024), 1006 format(string(String), '~1fGb', [Value]). 1007 1008overflow_reason(Context, fix) --> 1009 show_non_termination(Context), 1010 !. 1011overflow_reason(Context, enlarge) --> 1012 { Stack = Context.get(stack) }, 1013 !, 1014 [ ' In:'-[], nl ], 1015 stack(Stack). 1016overflow_reason(_Context, enlarge) --> 1017 [ ' Insufficient global stack'-[] ]. 1018 1019show_non_termination(Context) --> 1020 ( { Stack = Context.get(cycle) } 1021 -> [ ' Probable infinite recursion (cycle):'-[], nl ] 1022 ; { Stack = Context.get(non_terminating) } 1023 -> [ ' Possible non-terminating recursion:'-[], nl ] 1024 ), 1025 stack(Stack). 1026 1027stack([]) --> []. 1028stack([frame(Depth, M:Goal, _)|T]) --> 1029 [ ' [~D] ~q:'-[Depth, M] ], 1030 stack_goal(Goal), 1031 [ nl ], 1032 stack(T). 1033 1034stack_goal(Goal) --> 1035 { compound(Goal), 1036 !, 1037 compound_name_arity(Goal, Name, Arity) 1038 }, 1039 [ '~q('-[Name] ], 1040 stack_goal_args(1, Arity, Goal), 1041 [ ')'-[] ]. 1042stack_goal(Goal) --> 1043 [ '~q'-[Goal] ]. 1044 1045stack_goal_args(I, Arity, Goal) --> 1046 { I =< Arity, 1047 !, 1048 arg(I, Goal, A), 1049 I2 is I + 1 1050 }, 1051 stack_goal_arg(A), 1052 ( { I2 =< Arity } 1053 -> [ ', '-[] ], 1054 stack_goal_args(I2, Arity, Goal) 1055 ; [] 1056 ). 1057stack_goal_args(_, _, _) --> 1058 []. 1059 1060stack_goal_arg(A) --> 1061 { nonvar(A), 1062 A = [Len|T], 1063 ! 1064 }, 1065 ( {Len == cyclic_term} 1066 -> [ '[cyclic list]'-[] ] 1067 ; {T == []} 1068 -> [ '[length:~D]'-[Len] ] 1069 ; [ '[length:~D|~p]'-[Len, T] ] 1070 ). 1071stack_goal_arg(A) --> 1072 { nonvar(A), 1073 A = _/_, 1074 ! 1075 }, 1076 [ '<compound ~p>'-[A] ]. 1077stack_goal_arg(A) --> 1078 [ '~p'-[A] ]. 1079 1080resolve_overflow(fix) --> 1081 []. 1082resolve_overflow(enlarge) --> 1083 { current_prolog_flag(stack_limit, LimitBytes), 1084 NewLimit is LimitBytes * 2 1085 }, 1086 [ nl, 1087 'Use the --stack_limit=size[KMG] command line option or'-[], nl, 1088 '?- set_prolog_flag(stack_limit, ~I). to double the limit.'-[NewLimit] 1089 ].
1096out_of_c_stack --> 1097 { statistics(c_stack, Limit), Limit > 0 }, 1098 !, 1099 [ 'C-stack limit (~D bytes) exceeded.'-[Limit], nl ], 1100 resolve_c_stack_overflow(Limit). 1101out_of_c_stack --> 1102 { statistics(c_stack, Limit), Limit > 0 }, 1103 [ 'C-stack limit exceeded.'-[Limit], nl ], 1104 resolve_c_stack_overflow(Limit). 1105 1106resolve_c_stack_overflow(_Limit) --> 1107 { thread_self(main) }, 1108 [ 'Use the shell command ' ], code('~w', 'ulimit -s size'), 1109 [ ' to enlarge the limit.' ]. 1110resolve_c_stack_overflow(_Limit) --> 1111 [ 'Use the ' ], code('~w', 'c_stack(KBytes)'), 1112 [ ' option of '], code(thread_create/3), [' to enlarge the limit.' ]. 1113 1114 1115 /******************************* 1116 * MAKE/AUTOLOAD * 1117 *******************************/ 1118 1119prolog_message(make(reload(Files))) --> 1120 { length(Files, N) 1121 }, 1122 [ 'Make: reloading ~D files'-[N] ]. 1123prolog_message(make(done(_Files))) --> 1124 [ 'Make: finished' ]. 1125prolog_message(make(library_index(Dir))) --> 1126 [ 'Updating index for library ~w'-[Dir] ]. 1127prolog_message(autoload(Pred, File)) --> 1128 thread_context, 1129 [ 'autoloading ~p from ~w'-[Pred, File] ]. 1130prolog_message(autoload(read_index(Dir))) --> 1131 [ 'Loading autoload index for ~w'-[Dir] ]. 1132prolog_message(autoload(disabled(Loaded))) --> 1133 [ 'Disabled autoloading (loaded ~D files)'-[Loaded] ]. 1134prolog_message(autoload(already_defined(PI, From))) --> 1135 code(PI), 1136 ( { '$pi_head'(PI, Head), 1137 predicate_property(Head, built_in) 1138 } 1139 -> [' is a built-in predicate'] 1140 ; [ ' is already imported from module ' ], 1141 code(From) 1142 ). 1143 1144swi_message(autoload(Msg)) --> 1145 [ nl, ' ' ], 1146 autoload_message(Msg). 1147 1148autoload_message(not_exported(PI, Spec, _FullFile, _Exports)) --> 1149 [ ansi(code, '~w', [Spec]), 1150 ' does not export ', 1151 ansi(code, '~p', [PI]) 1152 ]. 1153autoload_message(no_file(Spec)) --> 1154 [ ansi(code, '~p', [Spec]), ': No such file' ]. 1155 1156 1157 /******************************* 1158 * COMPILER WARNINGS * 1159 *******************************/ 1160 1161% print warnings about dubious code raised by the compiler. 1162% TBD: pass in PC to produce exact error locations. 1163 1164prolog_message(compiler_warnings(Clause, Warnings0)) --> 1165 { print_goal_options(DefOptions), 1166 ( prolog_load_context(variable_names, VarNames) 1167 -> warnings_with_named_vars(Warnings0, VarNames, Warnings), 1168 Options = [variable_names(VarNames)|DefOptions] 1169 ; Options = DefOptions, 1170 Warnings = Warnings0 1171 ) 1172 }, 1173 compiler_warnings(Warnings, Clause, Options). 1174 1175warnings_with_named_vars([], _, []). 1176warnings_with_named_vars([H|T0], VarNames, [H|T]) :- 1177 term_variables(H, Vars), 1178 '$member'(V1, Vars), 1179 '$member'(_=V2, VarNames), 1180 V1 == V2, 1181 !, 1182 warnings_with_named_vars(T0, VarNames, T). 1183warnings_with_named_vars([_|T0], VarNames, T) :- 1184 warnings_with_named_vars(T0, VarNames, T). 1185 1186 1187compiler_warnings([], _, _) --> []. 1188compiler_warnings([H|T], Clause, Options) --> 1189 ( compiler_warning(H, Clause, Options) 1190 -> [] 1191 ; [ 'Unknown compiler warning: ~W'-[H,Options] ] 1192 ), 1193 ( {T==[]} 1194 -> [] 1195 ; [nl] 1196 ), 1197 compiler_warnings(T, Clause, Options). 1198 1199compiler_warning(eq_vv(A,B), _Clause, Options) --> 1200 ( { A == B } 1201 -> [ 'Test is always true: ~W'-[A==B, Options] ] 1202 ; [ 'Test is always false: ~W'-[A==B, Options] ] 1203 ). 1204compiler_warning(eq_singleton(A,B), _Clause, Options) --> 1205 [ 'Test is always false: ~W'-[A==B, Options] ]. 1206compiler_warning(neq_vv(A,B), _Clause, Options) --> 1207 ( { A \== B } 1208 -> [ 'Test is always true: ~W'-[A\==B, Options] ] 1209 ; [ 'Test is always false: ~W'-[A\==B, Options] ] 1210 ). 1211compiler_warning(neq_singleton(A,B), _Clause, Options) --> 1212 [ 'Test is always true: ~W'-[A\==B, Options] ]. 1213compiler_warning(unify_singleton(A,B), _Clause, Options) --> 1214 [ 'Unified variable is not used: ~W'-[A=B, Options] ]. 1215compiler_warning(always(Bool, Pred, Arg), _Clause, Options) --> 1216 { Goal =.. [Pred,Arg] }, 1217 [ 'Test is always ~w: ~W'-[Bool, Goal, Options] ]. 1218compiler_warning(unbalanced_var(V), _Clause, Options) --> 1219 [ 'Variable not introduced in all branches: ~W'-[V, Options] ]. 1220compiler_warning(branch_singleton(V), _Clause, Options) --> 1221 [ 'Singleton variable in branch: ~W'-[V, Options] ]. 1222compiler_warning(negation_singleton(V), _Clause, Options) --> 1223 [ 'Singleton variable in \\+: ~W'-[V, Options] ]. 1224compiler_warning(multiton(V), _Clause, Options) --> 1225 [ 'Singleton-marked variable appears more than once: ~W'-[V, Options] ]. 1226 1227print_goal_options( 1228 [ quoted(true), 1229 portray(true) 1230 ]). 1231 1232 1233 /******************************* 1234 * TOPLEVEL MESSAGES * 1235 *******************************/ 1236 1237prolog_message(version) --> 1238 { current_prolog_flag(version_git, Version) }, 1239 !, 1240 [ '~w'-[Version] ]. 1241prolog_message(version) --> 1242 { current_prolog_flag(version_data, swi(Major,Minor,Patch,Options)) 1243 }, 1244 ( { memberchk(tag(Tag), Options) } 1245 -> [ '~w.~w.~w-~w'-[Major, Minor, Patch, Tag] ] 1246 ; [ '~w.~w.~w'-[Major, Minor, Patch] ] 1247 ). 1248prolog_message(address_bits) --> 1249 { current_prolog_flag(address_bits, Bits) 1250 }, 1251 !, 1252 [ '~d bits, '-[Bits] ]. 1253prolog_message(threads) --> 1254 { current_prolog_flag(threads, true) 1255 }, 1256 !, 1257 [ 'threaded, ' ]. 1258prolog_message(threads) --> 1259 []. 1260prolog_message(copyright) --> 1261 [ 'SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software.', nl, 1262 'Please run ?- license. for legal details.' 1263 ]. 1264prolog_message(documentaton) --> 1265 [ 'For online help and background, visit https://www.swi-prolog.org', nl, 1266 'For built-in help, use ?- help(Topic). or ?- apropos(Word).' 1267 ]. 1268prolog_message(about) --> 1269 [ 'SWI-Prolog version (' ], 1270 prolog_message(threads), 1271 prolog_message(address_bits), 1272 ['version ' ], 1273 prolog_message(version), 1274 [ ')', nl ], 1275 prolog_message(copyright). 1276prolog_message(halt) --> 1277 [ 'halt' ]. 1278prolog_message(break(begin, Level)) --> 1279 [ 'Break level ~d'-[Level] ]. 1280prolog_message(break(end, Level)) --> 1281 [ 'Exit break level ~d'-[Level] ]. 1282prolog_message(var_query(_)) --> 1283 [ '... 1,000,000 ............ 10,000,000 years later', nl, nl, 1284 '~t~8|>> 42 << (last release gives the question)' 1285 ]. 1286prolog_message(close_on_abort(Stream)) --> 1287 [ 'Abort: closed stream ~p'-[Stream] ]. 1288prolog_message(cancel_halt(Reason)) --> 1289 [ 'Halt cancelled: ~p'-[Reason] ]. 1290prolog_message(on_error(halt(Status))) --> 1291 { statistics(errors, Errors), 1292 statistics(warnings, Warnings) 1293 }, 1294 [ 'Halting with status ~w due to ~D errors and ~D warnings'- 1295 [Status, Errors, Warnings] ]. 1296 1297prolog_message(query(QueryResult)) --> 1298 query_result(QueryResult). 1299 1300query_result(no) --> % failure 1301 [ ansi(truth(false), 'false.', []) ], 1302 extra_line. 1303query_result(yes(true, [])) --> % prompt_alternatives_on: groundness 1304 !, 1305 [ ansi(truth(true), 'true.', []) ], 1306 extra_line. 1307query_result(yes(Delays, Residuals)) --> 1308 result([], Delays, Residuals), 1309 extra_line. 1310query_result(done) --> % user typed <CR> 1311 extra_line. 1312query_result(yes(Bindings, Delays, Residuals)) --> 1313 result(Bindings, Delays, Residuals), 1314 prompt(yes, Bindings, Delays, Residuals). 1315query_result(more(Bindings, Delays, Residuals)) --> 1316 result(Bindings, Delays, Residuals), 1317 prompt(more, Bindings, Delays, Residuals). 1318query_result(help) --> 1319 [ ansi(bold, ' Possible actions:', []), nl, 1320 ' ; (n,r,space,TAB): redo | t: trace&redo'-[], nl, 1321 ' *: show choicepoint | c (a,RET): stop'-[], nl, 1322 ' w: write | p: print'-[], nl, 1323 ' b: break | h (?): help'-[], 1324 nl, nl 1325 ]. 1326query_result(action) --> 1327 [ 'Action? '-[], flush ]. 1328query_result(confirm) --> 1329 [ 'Please answer \'y\' or \'n\'? '-[], flush ]. 1330query_result(eof) --> 1331 [ nl ]. 1332query_result(toplevel_open_line) --> 1333 []. 1334 1335prompt(Answer, [], true, []-[]) --> 1336 !, 1337 prompt(Answer, empty). 1338prompt(Answer, _, _, _) --> 1339 !, 1340 prompt(Answer, non_empty). 1341 1342prompt(yes, empty) --> 1343 !, 1344 [ ansi(truth(true), 'true.', []) ], 1345 extra_line. 1346prompt(yes, _) --> 1347 !, 1348 [ full_stop ], 1349 extra_line. 1350prompt(more, empty) --> 1351 !, 1352 [ ansi(truth(true), 'true ', []), flush ]. 1353prompt(more, _) --> 1354 !, 1355 [ ' '-[], flush ]. 1356 1357result(Bindings, Delays, Residuals) --> 1358 { current_prolog_flag(answer_write_options, Options0), 1359 Options = [partial(true)|Options0], 1360 GOptions = [priority(999)|Options0] 1361 }, 1362 wfs_residual_program(Delays, GOptions), 1363 bindings(Bindings, [priority(699)|Options]), 1364 ( {Residuals == []-[]} 1365 -> bind_delays_sep(Bindings, Delays), 1366 delays(Delays, GOptions) 1367 ; bind_res_sep(Bindings, Residuals), 1368 residuals(Residuals, GOptions), 1369 ( {Delays == true} 1370 -> [] 1371 ; [','-[], nl], 1372 delays(Delays, GOptions) 1373 ) 1374 ). 1375 1376bindings([], _) --> 1377 []. 1378bindings([binding(Names,Skel,Subst)|T], Options) --> 1379 { '$last'(Names, Name) }, 1380 var_names(Names), value(Name, Skel, Subst, Options), 1381 ( { T \== [] } 1382 -> [ ','-[], nl ], 1383 bindings(T, Options) 1384 ; [] 1385 ). 1386 1387var_names([Name]) --> 1388 !, 1389 [ '~w = '-[Name] ]. 1390var_names([Name1,Name2|T]) --> 1391 !, 1392 [ '~w = ~w, '-[Name1, Name2] ], 1393 var_names([Name2|T]). 1394 1395 1396value(Name, Skel, Subst, Options) --> 1397 ( { var(Skel), Subst = [Skel=S] } 1398 -> { Skel = '$VAR'(Name) }, 1399 [ '~W'-[S, Options] ] 1400 ; [ '~W'-[Skel, Options] ], 1401 substitution(Subst, Options) 1402 ). 1403 1404substitution([], _) --> !. 1405substitution([N=V|T], Options) --> 1406 [ ', ', ansi(comment, '% where', []), nl, 1407 ' ~w = ~W'-[N,V,Options] ], 1408 substitutions(T, Options). 1409 1410substitutions([], _) --> []. 1411substitutions([N=V|T], Options) --> 1412 [ ','-[], nl, ' ~w = ~W'-[N,V,Options] ], 1413 substitutions(T, Options). 1414 1415 1416residuals(Normal-Hidden, Options) --> 1417 residuals1(Normal, Options), 1418 bind_res_sep(Normal, Hidden), 1419 ( {Hidden == []} 1420 -> [] 1421 ; [ansi(comment, '% with pending residual goals', []), nl] 1422 ), 1423 residuals1(Hidden, Options). 1424 1425residuals1([], _) --> 1426 []. 1427residuals1([G|Gs], Options) --> 1428 ( { Gs \== [] } 1429 -> [ '~W,'-[G, Options], nl ], 1430 residuals1(Gs, Options) 1431 ; [ '~W'-[G, Options] ] 1432 ). 1433 1434wfs_residual_program(true, _Options) --> 1435 !. 1436wfs_residual_program(Goal, _Options) --> 1437 { current_prolog_flag(toplevel_list_wfs_residual_program, true), 1438 '$current_typein_module'(TypeIn), 1439 ( current_predicate(delays_residual_program/2) 1440 -> true 1441 ; use_module(library(wfs), [delays_residual_program/2]) 1442 ), 1443 delays_residual_program(TypeIn:Goal, TypeIn:Program), 1444 Program \== [] 1445 }, 1446 !, 1447 [ ansi(comment, '% WFS residual program', []), nl ], 1448 [ ansi(wfs(residual_program), '~@', ['$messages':list_clauses(Program)]) ]. 1449wfs_residual_program(_, _) --> []. 1450 1451delays(true, _Options) --> 1452 !. 1453delays(Goal, Options) --> 1454 { current_prolog_flag(toplevel_list_wfs_residual_program, true) 1455 }, 1456 !, 1457 [ ansi(truth(undefined), '~W', [Goal, Options]) ]. 1458delays(_, _Options) --> 1459 [ ansi(truth(undefined), undefined, []) ]. 1460 1461:- public list_clauses/1. 1462 1463list_clauses([]). 1464list_clauses([H|T]) :- 1465 ( system_undefined(H) 1466 -> true 1467 ; portray_clause(user_output, H, [indent(4)]) 1468 ), 1469 list_clauses(T). 1470 1471system_undefined((undefined :- tnot(undefined))). 1472system_undefined((answer_count_restraint :- tnot(answer_count_restraint))). 1473system_undefined((radial_restraint :- tnot(radial_restraint))). 1474 1475bind_res_sep(_, []) --> !. 1476bind_res_sep(_, []-[]) --> !. 1477bind_res_sep([], _) --> !. 1478bind_res_sep(_, _) --> [','-[], nl]. 1479 1480bind_delays_sep([], _) --> !. 1481bind_delays_sep(_, true) --> !. 1482bind_delays_sep(_, _) --> [','-[], nl]. 1483 1484extra_line --> 1485 { current_prolog_flag(toplevel_extra_white_line, true) }, 1486 !, 1487 ['~N'-[]]. 1488extra_line --> 1489 []. 1490 1491prolog_message(if_tty(Message)) --> 1492 ( {current_prolog_flag(tty_control, true)} 1493 -> [ at_same_line | Message ] 1494 ; [] 1495 ). 1496prolog_message(halt(Reason)) --> 1497 [ '~w: halt'-[Reason] ]. 1498prolog_message(no_action(Char)) --> 1499 [ 'Unknown action: ~c (h for help)'-[Char], nl ]. 1500 1501prolog_message(history(help(Show, Help))) --> 1502 [ 'History Commands:', nl, 1503 ' !!. Repeat last query', nl, 1504 ' !nr. Repeat query numbered <nr>', nl, 1505 ' !str. Repeat last query starting with <str>', nl, 1506 ' !?str. Repeat last query holding <str>', nl, 1507 ' ^old^new. Substitute <old> into <new> of last query', nl, 1508 ' !nr^old^new. Substitute in query numbered <nr>', nl, 1509 ' !str^old^new. Substitute in query starting with <str>', nl, 1510 ' !?str^old^new. Substitute in query holding <str>', nl, 1511 ' ~w.~21|Show history list'-[Show], nl, 1512 ' ~w.~21|Show this list'-[Help], nl, nl 1513 ]. 1514prolog_message(history(no_event)) --> 1515 [ '! No such event' ]. 1516prolog_message(history(bad_substitution)) --> 1517 [ '! Bad substitution' ]. 1518prolog_message(history(expanded(Event))) --> 1519 [ '~w.'-[Event] ]. 1520prolog_message(history(history(Events))) --> 1521 history_events(Events). 1522 1523history_events([]) --> 1524 []. 1525history_events([Nr/Event|T]) --> 1526 [ '~t~w ~8|~W~W'-[ Nr, 1527 Event, [partial(true)], 1528 '.', [partial(true)] 1529 ], 1530 nl 1531 ], 1532 history_events(T).
welcome message to print information registered
using version/1.1540user_version_messages([]) --> []. 1541user_version_messages([H|T]) --> 1542 user_version_message(H), 1543 user_version_messages(T).
1547user_version_message(Term) --> 1548 translate_message(Term), !, [nl]. 1549user_version_message(Atom) --> 1550 [ '~w'-[Atom], nl ]. 1551 1552 1553 /******************************* 1554 * DEBUGGER MESSAGES * 1555 *******************************/ 1556 1557prolog_message(spy(Head)) --> 1558 { goal_to_predicate_indicator(Head, Pred) 1559 }, 1560 [ 'Spy point on ~p'-[Pred] ]. 1561prolog_message(nospy(Head)) --> 1562 { goal_to_predicate_indicator(Head, Pred) 1563 }, 1564 [ 'Spy point removed from ~p'-[Pred] ]. 1565prolog_message(trace_mode(OnOff)) --> 1566 [ 'Trace mode switched to ~w'-[OnOff] ]. 1567prolog_message(debug_mode(OnOff)) --> 1568 [ 'Debug mode switched to ~w'-[OnOff] ]. 1569prolog_message(debugging(OnOff)) --> 1570 [ 'Debug mode is ~w'-[OnOff] ]. 1571prolog_message(spying([])) --> 1572 !, 1573 [ 'No spy points' ]. 1574prolog_message(spying(Heads)) --> 1575 [ 'Spy points (see spy/1) on:', nl ], 1576 predicate_list(Heads). 1577prolog_message(trace(Head, [])) --> 1578 !, 1579 [ ' ' ], goal_predicate(Head), [ ' Not tracing'-[], nl]. 1580prolog_message(trace(Head, Ports)) --> 1581 { '$member'(Port, Ports), compound(Port), 1582 !, 1583 numbervars(Head+Ports, 0, _, [singletons(true)]) 1584 }, 1585 [ ' ~p: ~p'-[Head,Ports] ]. 1586prolog_message(trace(Head, Ports)) --> 1587 [ ' ' ], goal_predicate(Head), [ ': ~w'-[Ports], nl]. 1588prolog_message(tracing([])) --> 1589 !, 1590 [ 'No traced predicates (see trace/1,2)' ]. 1591prolog_message(tracing(Heads)) --> 1592 [ 'Trace points (see trace/1,2) on:', nl ], 1593 tracing_list(Heads). 1594 1595goal_predicate(Head) --> 1596 { predicate_property(Head, file(File)), 1597 predicate_property(Head, line_count(Line)), 1598 goal_to_predicate_indicator(Head, PI), 1599 term_string(PI, PIS, [quoted(true)]) 1600 }, 1601 [ url(File:Line, PIS) ]. 1602goal_predicate(Head) --> 1603 { goal_to_predicate_indicator(Head, PI) 1604 }, 1605 [ '~p'-[PI] ]. 1606 1607 1608predicate_list([]) --> % TBD: Share with dwim, etc. 1609 []. 1610predicate_list([H|T]) --> 1611 [ ' ' ], goal_predicate(H), [nl], 1612 predicate_list(T). 1613 1614tracing_list([]) --> 1615 []. 1616tracing_list([trace(Head, Ports)|T]) --> 1617 translate_message(trace(Head, Ports)), 1618 tracing_list(T). 1619 1620prolog_message(frame(Frame, backtrace, _PC)) --> 1621 !, 1622 { prolog_frame_attribute(Frame, level, Level) 1623 }, 1624 [ ansi(frame(level), '~t[~D] ~10|', [Level]) ], 1625 frame_context(Frame), 1626 frame_goal(Frame). 1627prolog_message(frame(Frame, choice, PC)) --> 1628 !, 1629 prolog_message(frame(Frame, backtrace, PC)). 1630prolog_message(frame(_, cut_call, _)) --> !, []. 1631prolog_message(frame(Goal, trace(Port))) --> 1632 !, 1633 thread_context, 1634 [ ' T ' ], 1635 port(Port), 1636 goal(Goal). 1637prolog_message(frame(Goal, trace(Port, Id))) --> 1638 !, 1639 thread_context, 1640 [ ' T ' ], 1641 port(Port, Id), 1642 goal(Goal). 1643prolog_message(frame(Frame, Port, _PC)) --> 1644 frame_flags(Frame), 1645 port(Port), 1646 frame_level(Frame), 1647 frame_context(Frame), 1648 frame_depth_limit(Port, Frame), 1649 frame_goal(Frame), 1650 [ flush ]. 1651 1652frame_goal(Frame) --> 1653 { prolog_frame_attribute(Frame, goal, Goal) 1654 }, 1655 goal(Goal). 1656 1657goal(Goal0) --> 1658 { clean_goal(Goal0, Goal), 1659 current_prolog_flag(debugger_write_options, Options) 1660 }, 1661 [ '~W'-[Goal, Options] ]. 1662 1663frame_level(Frame) --> 1664 { prolog_frame_attribute(Frame, level, Level) 1665 }, 1666 [ '(~D) '-[Level] ]. 1667 1668frame_context(Frame) --> 1669 ( { current_prolog_flag(debugger_show_context, true), 1670 prolog_frame_attribute(Frame, context_module, Context) 1671 } 1672 -> [ '[~w] '-[Context] ] 1673 ; [] 1674 ). 1675 1676frame_depth_limit(fail, Frame) --> 1677 { prolog_frame_attribute(Frame, depth_limit_exceeded, true) 1678 }, 1679 !, 1680 [ '[depth-limit exceeded] ' ]. 1681frame_depth_limit(_, _) --> 1682 []. 1683 1684frame_flags(Frame) --> 1685 { prolog_frame_attribute(Frame, goal, Goal), 1686 ( predicate_property(Goal, transparent) 1687 -> T = '^' 1688 ; T = ' ' 1689 ), 1690 ( predicate_property(Goal, spying) 1691 -> S = '*' 1692 ; S = ' ' 1693 ) 1694 }, 1695 [ '~w~w '-[T, S] ]. 1696 1697% trace/1 context handling 1698port(Port, Dict) --> 1699 { _{level:Level, start:Time} :< Dict 1700 }, 1701 ( { Port \== call, 1702 get_time(Now), 1703 Passed is (Now - Time)*1000.0 1704 } 1705 -> [ '[~d +~1fms] '-[Level, Passed] ] 1706 ; [ '[~d] '-[Level] ] 1707 ), 1708 port(Port). 1709port(Port, _Id-Level) --> 1710 [ '[~d] '-[Level] ], 1711 port(Port). 1712 1713port(Port) --> 1714 { port_name(Port, Name) 1715 }, 1716 !, 1717 [ ansi(port(Port), '~w: ', [Name]) ]. 1718 1719port_name(call, 'Call'). 1720port_name(exit, 'Exit'). 1721port_name(fail, 'Fail'). 1722port_name(redo, 'Redo'). 1723port_name(unify, 'Unify'). 1724port_name(exception, 'Exception'). 1725 1726clean_goal(M:Goal, Goal) :- 1727 hidden_module(M), 1728 !. 1729clean_goal(M:Goal, Goal) :- 1730 predicate_property(M:Goal, built_in), 1731 !. 1732clean_goal(Goal, Goal). 1733 1734 1735 /******************************* 1736 * COMPATIBILITY * 1737 *******************************/ 1738 1739prolog_message(compatibility(renamed(Old, New))) --> 1740 [ 'The predicate ~p has been renamed to ~p.'-[Old, New], nl, 1741 'Please update your sources for compatibility with future versions.' 1742 ]. 1743 1744 1745 /******************************* 1746 * THREADS * 1747 *******************************/ 1748 1749prolog_message(abnormal_thread_completion(Goal, exception(Ex))) --> 1750 !, 1751 [ 'Thread running "~p" died on exception: '-[Goal] ], 1752 translate_message(Ex). 1753prolog_message(abnormal_thread_completion(Goal, fail)) --> 1754 [ 'Thread running "~p" died due to failure'-[Goal] ]. 1755prolog_message(threads_not_died(Running)) --> 1756 [ 'The following threads wouldn\'t die: ~p'-[Running] ]. 1757 1758 1759 /******************************* 1760 * PACKS * 1761 *******************************/ 1762 1763prolog_message(pack(attached(Pack, BaseDir))) --> 1764 [ 'Attached package ~w at ~q'-[Pack, BaseDir] ]. 1765prolog_message(pack(duplicate(Entry, OldDir, Dir))) --> 1766 [ 'Package ~w already attached at ~q.'-[Entry,OldDir], nl, 1767 '\tIgnoring version from ~q'- [Dir] 1768 ]. 1769prolog_message(pack(no_arch(Entry, Arch))) --> 1770 [ 'Package ~w: no binary for architecture ~w'-[Entry, Arch] ]. 1771 1772 /******************************* 1773 * MISC * 1774 *******************************/ 1775 1776prolog_message(null_byte_in_path(Component)) --> 1777 [ '0-byte in PATH component: ~p (skipped directory)'-[Component] ]. 1778prolog_message(invalid_tmp_dir(Dir, Reason)) --> 1779 [ 'Cannot use ~p as temporary file directory: ~w'-[Dir, Reason] ]. 1780prolog_message(ambiguous_stream_pair(Pair)) --> 1781 [ 'Ambiguous operation on stream pair ~p'-[Pair] ]. 1782prolog_message(backcomp(init_file_moved(FoundFile))) --> 1783 { absolute_file_name(app_config('init.pl'), InitFile, 1784 [ file_errors(fail) 1785 ]) 1786 }, 1787 [ 'The location of the config file has moved'-[], nl, 1788 ' from "~w"'-[FoundFile], nl, 1789 ' to "~w"'-[InitFile], nl, 1790 ' See https://www.swi-prolog.org/modified/config-files.html'-[] 1791 ]. 1792prolog_message(not_accessed_flags(List)) --> 1793 [ 'The following Prolog flags have been set but not used:', nl ], 1794 flags(List). 1795prolog_message(prolog_flag_invalid_preset(Flag, Preset, _Type, New)) --> 1796 [ 'Prolog flag ', ansi(code, '~q', Flag), ' has been (re-)created with a type that is \c 1797 incompatible with its value.', nl, 1798 'Value updated from ', ansi(code, '~p', [Preset]), ' to default (', 1799 ansi(code, '~p', [New]), ')' 1800 ]. 1801 1802 1803flags([H|T]) --> 1804 [' ', ansi(code, '~q', [H])], 1805 ( {T == []} 1806 -> [] 1807 ; [nl], 1808 flags(T) 1809 ). 1810 1811 1812 /******************************* 1813 * DEPRECATED * 1814 *******************************/ 1815 1816deprecated(set_prolog_stack(_Stack,limit)) --> 1817 [ 'set_prolog_stack/2: limit(Size) sets the combined limit.'-[], nl, 1818 'See https://www.swi-prolog.org/changes/stack-limit.html' 1819 ]. 1820deprecated(autoload(TargetModule, File, _M:PI, expansion)) --> 1821 !, 1822 [ 'Auto-loading ', ansi(code, '~p', [PI]), ' from ' ], 1823 load_file(File), [ ' into ' ], 1824 target_module(TargetModule), 1825 [ ' is deprecated due to term- or goal-expansion' ]. 1826 1827load_file(File) --> 1828 { file_base_name(File, Base), 1829 absolute_file_name(library(Base), File, [access(read), file_errors(fail)]), 1830 file_name_extension(Clean, pl, Base) 1831 }, 1832 !, 1833 [ ansi(code, '~p', [library(Clean)]) ]. 1834load_file(File) --> 1835 [ url(File) ]. 1836 1837target_module(Module) --> 1838 { module_property(Module, file(File)) }, 1839 !, 1840 load_file(File). 1841target_module(Module) --> 1842 [ 'module ', ansi(code, '~p', [Module]) ]. 1843 1844 1845 1846 /******************************* 1847 * TRIPWIRES * 1848 *******************************/ 1849 1850tripwire_message(max_integer_size, Bytes) --> 1851 !, 1852 [ 'Trapped tripwire max_integer_size: big integers and \c 1853 rationals are limited to ~D bytes'-[Bytes] ]. 1854tripwire_message(Wire, Context) --> 1855 [ 'Trapped tripwire ~w for '-[Wire] ], 1856 tripwire_context(Wire, Context). 1857 1858tripwire_context(_, ATrie) --> 1859 { '$is_answer_trie'(ATrie, _), 1860 !, 1861 '$tabling':atrie_goal(ATrie, QGoal), 1862 user_predicate_indicator(QGoal, Goal) 1863 }, 1864 [ '~p'-[Goal] ]. 1865tripwire_context(_, Ctx) --> 1866 [ '~p'-[Ctx] ]. 1867 1868 1869 /******************************* 1870 * INTERNATIONALIZATION * 1871 *******************************/ 1872 1873:- create_prolog_flag(message_language, default, []).
nl_BE) and ends with en.1880message_lang(Lang) :- 1881 current_message_lang(Lang0), 1882 ( Lang0 == en 1883 -> Lang = en 1884 ; sub_atom(Lang0, 0, _, _, en_) 1885 -> longest_id(Lang0, Lang) 1886 ; ( longest_id(Lang0, Lang) 1887 ; Lang = en 1888 ) 1889 ). 1890 1891longest_id(Lang, Id) :- 1892 split_string(Lang, "_-", "", [H|Components]), 1893 longest_prefix(Components, Taken), 1894 atomic_list_concat([H|Taken], '_', Id). 1895 1896longest_prefix([H|T0], [H|T]) :- 1897 longest_prefix(T0, T). 1898longest_prefix(_, []).
1904current_message_lang(Lang) :- 1905 ( current_prolog_flag(message_language, Lang0), 1906 Lang0 \== default 1907 -> Lang = Lang0 1908 ; os_user_lang(Lang0) 1909 -> clean_encoding(Lang0, Lang1), 1910 set_prolog_flag(message_language, Lang1), 1911 Lang = Lang1 1912 ; Lang = en 1913 ). 1914 1915os_user_lang(Lang) :- 1916 current_prolog_flag(windows, true), 1917 win_get_user_preferred_ui_languages(name, [Lang|_]). 1918os_user_lang(Lang) :- 1919 catch(setlocale(messages, _, ''), _, fail), 1920 setlocale(messages, Lang, Lang). 1921os_user_lang(Lang) :- 1922 getenv('LANG', Lang). 1923 1924 1925clean_encoding(Lang0, Lang) :- 1926 ( sub_atom(Lang0, A, _, _, '.') 1927 -> sub_atom(Lang0, 0, A, _, Lang) 1928 ; Lang = Lang0 1929 ). 1930 1931 /******************************* 1932 * PRIMITIVES * 1933 *******************************/ 1934 1935code(Term) --> 1936 code('~p', Term). 1937 1938code(Format, Term) --> 1939 [ ansi(code, Format, [Term]) ]. 1940 1941 1942 /******************************* 1943 * DEFAULT THEME * 1944 *******************************/ 1945 1946:- public default_theme/2. 1947 1948default_theme(var, [fg(red)]). 1949default_theme(code, [fg(blue)]). 1950default_theme(comment, [fg(green)]). 1951default_theme(warning, [fg(red)]). 1952default_theme(error, [bold, fg(red)]). 1953default_theme(truth(false), [bold, fg(red)]). 1954default_theme(truth(true), [bold]). 1955default_theme(truth(undefined), [bold, fg(cyan)]). 1956default_theme(wfs(residual_program), [fg(cyan)]). 1957default_theme(frame(level), [bold]). 1958default_theme(port(call), [bold, fg(green)]). 1959default_theme(port(exit), [bold, fg(green)]). 1960default_theme(port(fail), [bold, fg(red)]). 1961default_theme(port(redo), [bold, fg(yellow)]). 1962default_theme(port(unify), [bold, fg(blue)]). 1963default_theme(port(exception), [bold, fg(magenta)]). 1964default_theme(message(informational), [fg(green)]). 1965default_theme(message(information), [fg(green)]). 1966default_theme(message(debug(_)), [fg(blue)]). 1967default_theme(message(Level), Attrs) :- 1968 nonvar(Level), 1969 default_theme(Level, Attrs). 1970 1971 1972 /******************************* 1973 * PRINTING MESSAGES * 1974 *******************************/ 1975 1976:- multifile 1977 user:message_hook/3, 1978 prolog:message_prefix_hook/2. 1979:- dynamic 1980 user:message_hook/3, 1981 prolog:message_prefix_hook/2. 1982:- thread_local 1983 user:thread_message_hook/3. 1984:- '$hide'((push_msg/1,pop_msg/0)). 1985:- '$notransact'((user:message_hook/3, 1986 prolog:message_prefix_hook/2, 1987 user:thread_message_hook/3)).
1994print_message(Level, _Term) :- 1995 msg_property(Level, stream(S)), 1996 stream_property(S, error(true)), 1997 !. 1998print_message(Level, Term) :- 1999 setup_call_cleanup( 2000 push_msg(Term, Stack), 2001 ignore(print_message_guarded(Level, Term)), 2002 pop_msg(Stack)), 2003 !. 2004print_message(Level, Term) :- 2005 ( Level \== silent 2006 -> format(user_error, 'Recursive ~w message: ~q~n', [Level, Term]), 2007 backtrace(20) 2008 ; true 2009 ). 2010 2011push_msg(Term, Messages) :- 2012 nb_current('$inprint_message', Messages), 2013 !, 2014 \+ ( '$member'(Msg, Messages), 2015 Msg =@= Term 2016 ), 2017 Stack = [Term|Messages], 2018 b_setval('$inprint_message', Stack). 2019push_msg(Term, []) :- 2020 b_setval('$inprint_message', [Term]). 2021 2022pop_msg(Stack) :- 2023 nb_delete('$inprint_message'), % delete history 2024 b_setval('$inprint_message', Stack). 2025 2026print_message_guarded(Level, Term) :- 2027 ( must_print(Level, Term) 2028 -> ( translate_message(Term, Lines, []) 2029 -> ( nonvar(Term), 2030 ( notrace(user:thread_message_hook(Term, Level, Lines)) 2031 -> true 2032 ; notrace(user:message_hook(Term, Level, Lines)) 2033 ) 2034 -> true 2035 ; '$inc_message_count'(Level), 2036 print_system_message(Term, Level, Lines), 2037 maybe_halt_on_error(Level) 2038 ) 2039 ) 2040 ; true 2041 ). 2042 2043maybe_halt_on_error(error) :- 2044 current_prolog_flag(on_error, halt), 2045 !, 2046 halt(1). 2047maybe_halt_on_error(warning) :- 2048 current_prolog_flag(on_warning, halt), 2049 !, 2050 halt(1). 2051maybe_halt_on_error(_).
2061print_system_message(_, silent, _) :- !. 2062print_system_message(_, informational, _) :- 2063 current_prolog_flag(verbose, silent), 2064 !. 2065print_system_message(_, banner, _) :- 2066 current_prolog_flag(verbose, silent), 2067 !. 2068print_system_message(_, _, []) :- !. 2069print_system_message(Term, Kind, Lines) :- 2070 catch(flush_output(user_output), _, true), % may not exist 2071 source_location(File, Line), 2072 Term \= error(syntax_error(_), _), 2073 msg_property(Kind, location_prefix(File:Line, LocPrefix, LinePrefix)), 2074 !, 2075 to_list(LocPrefix, LocPrefixL), 2076 insert_prefix(Lines, LinePrefix, Ctx, PrefixLines), 2077 '$append'([ [begin(Kind, Ctx)], 2078 LocPrefixL, 2079 [nl], 2080 PrefixLines, 2081 [end(Ctx)] 2082 ], 2083 AllLines), 2084 msg_property(Kind, stream(Stream)), 2085 ignore(stream_property(Stream, position(Pos))), 2086 print_message_lines(Stream, AllLines), 2087 ( \+ stream_property(Stream, position(Pos)), 2088 msg_property(Kind, wait(Wait)), 2089 Wait > 0 2090 -> sleep(Wait) 2091 ; true 2092 ). 2093print_system_message(_, Kind, Lines) :- 2094 msg_property(Kind, stream(Stream)), 2095 print_message_lines(Stream, kind(Kind), Lines). 2096 2097to_list(ListIn, List) :- 2098 is_list(ListIn), 2099 !, 2100 List = ListIn. 2101to_list(NonList, [NonList]). 2102 2103:- multifile 2104 user:message_property/2. 2105 2106msg_property(Kind, Property) :- 2107 notrace(user:message_property(Kind, Property)), 2108 !. 2109msg_property(Kind, prefix(Prefix)) :- 2110 msg_prefix(Kind, Prefix), 2111 !. 2112msg_property(_, prefix('~N')) :- !. 2113msg_property(query, stream(user_output)) :- !. 2114msg_property(_, stream(user_error)) :- !. 2115msg_property(error, tag('ERROR')). 2116msg_property(warning, tag('Warning')). 2117msg_property(Level, 2118 location_prefix(File:Line, 2119 ['~N~w: '-[Tag], url(File:Line), ':'], 2120 '~N~w: '-[Tag])) :- 2121 include_msg_location(Level), 2122 msg_property(Level, tag(Tag)). 2123msg_property(error, wait(0.1)) :- !. 2124 2125include_msg_location(warning). 2126include_msg_location(error). 2127 2128msg_prefix(debug(_), Prefix) :- 2129 msg_context('~N% ', Prefix). 2130msg_prefix(Level, Prefix) :- 2131 msg_property(Level, tag(Tag)), 2132 atomics_to_string(['~N', Tag, ': '], Prefix0), 2133 msg_context(Prefix0, Prefix). 2134msg_prefix(informational, '~N% '). 2135msg_prefix(information, '~N% ').
message_context. Recognised context terms are:
time(Format)In addition, the hook message_prefix_hook/2 is called that allows for additional context information.
2149msg_context(Prefix0, Prefix) :- 2150 current_prolog_flag(message_context, Context), 2151 is_list(Context), 2152 !, 2153 add_message_context(Context, Prefix0, Prefix). 2154msg_context(Prefix, Prefix). 2155 2156add_message_context([], Prefix, Prefix). 2157add_message_context([H|T], Prefix0, Prefix) :- 2158 ( add_message_context1(H, Prefix0, Prefix1) 2159 -> true 2160 ; Prefix1 = Prefix0 2161 ), 2162 add_message_context(T, Prefix1, Prefix). 2163 2164add_message_context1(Context, Prefix0, Prefix) :- 2165 prolog:message_prefix_hook(Context, Extra), 2166 atomics_to_string([Prefix0, Extra, ' '], Prefix). 2167add_message_context1(time, Prefix0, Prefix) :- 2168 get_time(Now), 2169 format_time(string(S), '%T.%3f ', Now), 2170 string_concat(Prefix0, S, Prefix). 2171add_message_context1(time(Format), Prefix0, Prefix) :- 2172 get_time(Now), 2173 format_time(string(S), Format, Now), 2174 atomics_to_string([Prefix0, S, ' '], Prefix). 2175add_message_context1(thread, Prefix0, Prefix) :- 2176 thread_self(Id0), 2177 Id0 \== main, 2178 !, 2179 ( atom(Id0) 2180 -> Id = Id0 2181 ; thread_property(Id0, id(Id)) 2182 ), 2183 format(string(Prefix), '~w[Thread ~w] ', [Prefix0, Id]).
2190print_message_lines(Stream, kind(Kind), Lines) :- 2191 !, 2192 msg_property(Kind, prefix(Prefix)), 2193 insert_prefix(Lines, Prefix, Ctx, PrefixLines), 2194 '$append'([ begin(Kind, Ctx) 2195 | PrefixLines 2196 ], 2197 [ end(Ctx) 2198 ], 2199 AllLines), 2200 print_message_lines(Stream, AllLines). 2201print_message_lines(Stream, Prefix, Lines) :- 2202 insert_prefix(Lines, Prefix, _, PrefixLines), 2203 print_message_lines(Stream, PrefixLines).
2207insert_prefix([at_same_line|Lines0], Prefix, Ctx, Lines) :- 2208 !, 2209 prefix_nl(Lines0, Prefix, Ctx, Lines). 2210insert_prefix(Lines0, Prefix, Ctx, [prefix(Prefix)|Lines]) :- 2211 prefix_nl(Lines0, Prefix, Ctx, Lines). 2212 2213prefix_nl([], _, _, [nl]). 2214prefix_nl([nl], _, _, [nl]) :- !. 2215prefix_nl([flush], _, _, [flush]) :- !. 2216prefix_nl([nl|T0], Prefix, Ctx, [nl, prefix(Prefix)|T]) :- 2217 !, 2218 prefix_nl(T0, Prefix, Ctx, T). 2219prefix_nl([ansi(Attrs,Fmt,Args)|T0], Prefix, Ctx, 2220 [ansi(Attrs,Fmt,Args,Ctx)|T]) :- 2221 !, 2222 prefix_nl(T0, Prefix, Ctx, T). 2223prefix_nl([H|T0], Prefix, Ctx, [H|T]) :- 2224 prefix_nl(T0, Prefix, Ctx, T).
2228print_message_lines(Stream, Lines) :- 2229 with_output_to( 2230 Stream, 2231 notrace(print_message_lines_guarded(current_output, Lines))). 2232 2233print_message_lines_guarded(_, []) :- !. 2234print_message_lines_guarded(S, [H|T]) :- 2235 line_element(S, H), 2236 print_message_lines_guarded(S, T). 2237 2238line_element(S, E) :- 2239 prolog:message_line_element(S, E), 2240 !. 2241line_element(S, full_stop) :- 2242 !, 2243 '$put_token'(S, '.'). % insert space if needed. 2244line_element(S, nl) :- 2245 !, 2246 nl(S). 2247line_element(S, prefix(Fmt-Args)) :- 2248 !, 2249 safe_format(S, Fmt, Args). 2250line_element(S, prefix(Fmt)) :- 2251 !, 2252 safe_format(S, Fmt, []). 2253line_element(S, flush) :- 2254 !, 2255 flush_output(S). 2256line_element(S, Fmt-Args) :- 2257 !, 2258 safe_format(S, Fmt, Args). 2259line_element(S, ansi(_, Fmt, Args)) :- 2260 !, 2261 safe_format(S, Fmt, Args). 2262line_element(S, ansi(_, Fmt, Args, _Ctx)) :- 2263 !, 2264 safe_format(S, Fmt, Args). 2265line_element(S, url(URL)) :- 2266 !, 2267 print_link(S, URL). 2268line_element(S, url(_URL, Fmt-Args)) :- 2269 !, 2270 safe_format(S, Fmt, Args). 2271line_element(S, url(_URL, Fmt)) :- 2272 !, 2273 safe_format(S, Fmt, []). 2274line_element(_, begin(_Level, _Ctx)) :- !. 2275line_element(_, end(_Ctx)) :- !. 2276line_element(S, Fmt) :- 2277 safe_format(S, Fmt, []). 2278 2279print_link(S, File:Line:Column) :- 2280 !, 2281 safe_format(S, '~w:~d:~d', [File, Line, Column]). 2282print_link(S, File:Line) :- 2283 !, 2284 safe_format(S, '~w:~d', [File, Line]). 2285print_link(S, File) :- 2286 safe_format(S, '~w', [File]).
2290safe_format(S, Fmt, Args) :- 2291 E = error(_,_), 2292 catch(format(S,Fmt,Args), E, 2293 format_failed(S,Fmt,Args,E)). 2294 2295format_failed(S, _Fmt, _Args, E) :- 2296 stream_property(S, error(true)), 2297 !, 2298 throw(E). 2299format_failed(S, Fmt, Args, error(E,_)) :- 2300 format(S, '~N [[ EXCEPTION while printing message ~q~n\c 2301 ~7|with arguments ~W:~n\c 2302 ~7|raised: ~W~n~4|]]~n', 2303 [ Fmt, 2304 Args, [quoted(true), max_depth(10)], 2305 E, [quoted(true), max_depth(10)] 2306 ]).
2312message_to_string(Term, Str) :- 2313 translate_message(Term, Actions, []), 2314 !, 2315 actions_to_format(Actions, Fmt, Args), 2316 format(string(Str), Fmt, Args). 2317 2318actions_to_format([], '', []) :- !. 2319actions_to_format([nl], '', []) :- !. 2320actions_to_format([Term, nl], Fmt, Args) :- 2321 !, 2322 actions_to_format([Term], Fmt, Args). 2323actions_to_format([nl|T], Fmt, Args) :- 2324 !, 2325 actions_to_format(T, Fmt0, Args), 2326 atom_concat('~n', Fmt0, Fmt). 2327actions_to_format([ansi(_Attrs, Fmt0, Args0)|Tail], Fmt, Args) :- 2328 !, 2329 actions_to_format(Tail, Fmt1, Args1), 2330 atom_concat(Fmt0, Fmt1, Fmt), 2331 append_args(Args0, Args1, Args). 2332actions_to_format([url(Pos)|Tail], Fmt, Args) :- 2333 !, 2334 actions_to_format(Tail, Fmt1, Args1), 2335 url_actions_to_format(url(Pos), Fmt1, Args1, Fmt, Args). 2336actions_to_format([url(URL, Label)|Tail], Fmt, Args) :- 2337 !, 2338 actions_to_format(Tail, Fmt1, Args1), 2339 url_actions_to_format(url(URL, Label), Fmt1, Args1, Fmt, Args). 2340actions_to_format([Fmt0-Args0|Tail], Fmt, Args) :- 2341 !, 2342 actions_to_format(Tail, Fmt1, Args1), 2343 atom_concat(Fmt0, Fmt1, Fmt), 2344 append_args(Args0, Args1, Args). 2345actions_to_format([Skip|T], Fmt, Args) :- 2346 action_skip(Skip), 2347 !, 2348 actions_to_format(T, Fmt, Args). 2349actions_to_format([Term|Tail], Fmt, Args) :- 2350 atomic(Term), 2351 !, 2352 actions_to_format(Tail, Fmt1, Args), 2353 atom_concat(Term, Fmt1, Fmt). 2354actions_to_format([Term|Tail], Fmt, Args) :- 2355 actions_to_format(Tail, Fmt1, Args1), 2356 atom_concat('~w', Fmt1, Fmt), 2357 append_args([Term], Args1, Args). 2358 2359action_skip(at_same_line). 2360action_skip(flush). 2361action_skip(begin(_Level, _Ctx)). 2362action_skip(end(_Ctx)). 2363 2364url_actions_to_format(url(File:Line:Column), Fmt1, Args1, Fmt, Args) :- 2365 !, 2366 atom_concat('~w:~d:~d', Fmt1, Fmt), 2367 append_args([File,Line,Column], Args1, Args). 2368url_actions_to_format(url(File:Line), Fmt1, Args1, Fmt, Args) :- 2369 !, 2370 atom_concat('~w:~d', Fmt1, Fmt), 2371 append_args([File,Line], Args1, Args). 2372url_actions_to_format(url(File), Fmt1, Args1, Fmt, Args) :- 2373 !, 2374 atom_concat('~w', Fmt1, Fmt), 2375 append_args([File], Args1, Args). 2376url_actions_to_format(url(_URL, Label), Fmt1, Args1, Fmt, Args) :- 2377 !, 2378 atom_concat('~w', Fmt1, Fmt), 2379 append_args([Label], Args1, Args). 2380 2381 2382append_args(M:Args0, Args1, M:Args) :- 2383 !, 2384 strip_module(Args1, _, A1), 2385 to_list(Args0, Args01), 2386 '$append'(Args01, A1, Args). 2387append_args(Args0, Args1, Args) :- 2388 strip_module(Args1, _, A1), 2389 to_list(Args0, Args01), 2390 '$append'(Args01, A1, Args). 2391 2392 /******************************* 2393 * MESSAGES TO PRINT ONCE * 2394 *******************************/ 2395 2396:- dynamic 2397 printed/2.
2403print_once(compatibility(_), _). 2404print_once(null_byte_in_path(_), _). 2405print_once(deprecated(_), _).
2411must_print(Level, Message) :- 2412 nonvar(Message), 2413 print_once(Message, Level), 2414 !, 2415 \+ printed(Message, Level), 2416 assert(printed(Message, Level)). 2417must_print(_, _)