/usr/share/gnu-smalltalk/kernel/SysExcept.st is in gnu-smalltalk-common 3.2.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 | "======================================================================
|
| ANSI exception handling classes
|
|
======================================================================"
"======================================================================
|
| Copyright 2000, 2001, 2002, 2007, 2008, 2009 Free Software Foundation, Inc.
| Written by Paolo Bonzini.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library is distributed in the hope that it will be
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Exception subclass: Error [
<category: 'Language-Exceptions'>
<comment: 'Error represents a fatal error. Instances of it are not resumable.'>
description [
"Answer a textual description of the exception."
<category: 'exception description'>
^'An exceptional condition has occurred, and has prevented normal
continuation of processing.'
]
isResumable [
"Answer false. Error exceptions are by default unresumable; subclasses
can override this method if desired."
<category: 'exception description'>
^false
]
]
Exception subclass: Notification [
<category: 'Language-Exceptions'>
<comment: 'Notification represents a resumable, exceptional yet non-erroneous,
situation. Signaling a notification in absence of an handler simply
returns nil.'>
description [
"Answer a textual description of the exception."
<category: 'exception description'>
^'An exceptional condition has occurred, but it is not to be considered
an error.'
]
isResumable [
"Answer true. Notification exceptions are by default resumable."
<category: 'exception description'>
^true
]
defaultAction [
"Do the default action for notifications, which is to resume execution
of the context which signaled the exception."
<category: 'exception description'>
self resume: nil
]
]
Notification subclass: Warning [
<category: 'Language-Exceptions'>
<comment: 'Warning represents an `important'' but resumable error.'>
description [
"Answer a textual description of the exception."
<category: 'exception description'>
^'An exceptional condition has occurred. It is reported to the user
even though it is not to be considered an error.'
]
]
Exception subclass: Halt [
<category: 'Language-Exceptions'>
<comment: 'Halt represents a resumable error, usually a bug.'>
description [
"Answer a textual description of the exception."
<category: 'description'>
^'#halt was sent.'
]
isResumable [
"Answer true. #halt exceptions are by default resumable."
<category: 'description'>
^true
]
]
Error subclass: ArithmeticError [
<category: 'Language-Exceptions'>
<comment: 'An ArithmeticError exception is raised by numeric classes when a program
tries to do something wrong, such as extracting the square root of a
negative number.'>
description [
"Answer a textual description of the exception."
<category: 'description'>
^'The program attempted to do an impossible arithmetic operation'
]
isResumable [
"Answer true. Arithmetic exceptions are by default resumable."
<category: 'description'>
^true
]
]
Error subclass: MessageNotUnderstood [
| message receiver |
<category: 'Language-Exceptions'>
<comment: 'MessageNotUnderstood represents an error during message lookup. Signaling
it is the default action of the #doesNotUnderstand: handler'>
message [
"Answer the message that wasn't understood"
<category: 'accessing'>
^message
]
receiver [
"Answer the object to whom the message send was directed"
<category: 'accessing'>
^receiver
]
message: aMessage receiver: anObject [
<category: 'private'>
message := aMessage.
receiver := anObject.
self messageText: 'did not understand ' , message selector printString
]
description [
"Answer a textual description of the exception."
<category: 'description'>
^'The program sent a message which was not understood by the receiver.'
]
isResumable [
"Answer true. #doesNotUnderstand: exceptions are by default resumable."
<category: 'description'>
^true
]
]
ArithmeticError subclass: ZeroDivide [
| dividend |
<category: 'Language-Exceptions'>
<comment: 'A ZeroDivide exception is raised by numeric classes when a program tries
to divide by zero. Information on the dividend is available to the
handler.'>
ZeroDivide class >> dividend: aNumber [
"Create a new ZeroDivide object remembering that the dividend was
aNumber."
<category: 'instance creation'>
^super new dividend: aNumber
]
ZeroDivide class >> new [
"Create a new ZeroDivide object; the dividend is conventionally
set to zero."
<category: 'instance creation'>
^super new dividend: 0
]
dividend [
"Answer the number that was being divided by zero"
<category: 'accessing'>
^dividend
]
dividend: aNumber [
<category: 'private'>
dividend := aNumber
]
description [
"Answer a textual description of the exception."
<category: 'description'>
^'The program attempted to divide a number by zero'
]
]
Namespace current: SystemExceptions [
Notification subclass: ProcessBeingTerminated [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a process is terminated.'>
| semaphore |
ProcessBeingTerminated class >> initialize [
(UndefinedObject>>#'__terminate')
makeReadOnly: false;
descriptor: ((MethodInfo new: 1)
methodClass: UndefinedObject;
selector: #'__terminate';
at: 1 put: (Message
selector: #exceptionHandlerSearch:reset:
arguments: {
[ :context :signal |
(self handles: signal)
ifTrue: [
signal
onDoBlock: nil
handlerBlock: [ :sig | thisContext environment continue: nil ]
onDoContext: nil
previousState: nil.
#found ]
ifFalse: [nil] ].
[ :context | ] });
yourself);
makeReadOnly: true
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'the current process is being terminated'
]
semaphore [
"If the process was waiting on a semaphore, answer it."
<category: 'accessing'>
^semaphore
]
semaphore: aSemaphore [
"If the process was waiting on a semaphore, answer it."
<category: 'accessing'>
semaphore := aSemaphore
]
]
]
Namespace current: SystemExceptions [
Notification subclass: EndOfStream [
| stream |
<category: 'Language-Exceptions'>
<comment: 'I am raised when a stream reaches its end.'>
EndOfStream class >> signalOn: stream [
"Answer an exception reporting the parameter has reached its end."
<category: 'signaling'>
^(self new)
stream: stream;
signal
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'end of stream reached'
]
stream [
"Answer the stream whose end was reached."
<category: 'accessing'>
^stream
]
stream: anObject [
"Set the stream whose end was reached."
<category: 'accessing'>
stream := anObject
]
]
]
Namespace current: SystemExceptions [
Error subclass: NotEnoughElements [
| remainingCount |
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes #next: but not enough items remain in the
stream.'>
NotEnoughElements class >> signalOn: remainingCount [
"Answer an exception reporting the parameter as invalid."
<category: 'signaling'>
^(self new)
remainingCount: remainingCount;
signal
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'premature end of stream'
]
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'%1: %2 element(s) missing' %
{self basicMessageText.
self remainingCount}
]
remainingCount [
"Answer the number of items that were to be read."
<category: 'accessing'>
^remainingCount
]
remainingCount: anObject [
"Set the number of items that were to be read."
<category: 'accessing'>
remainingCount := anObject
]
]
]
Namespace current: SystemExceptions [
Error subclass: InvalidValue [
| value |
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a method with an invalid receiver or argument.'>
InvalidValue class >> signalOn: value [
"Answer an exception reporting the parameter as invalid."
<category: 'signaling'>
^(self new)
value: value;
signal
]
InvalidValue class >> signalOn: value reason: reason [
"Answer an exception reporting `value' as invalid, for the given
reason."
<category: 'signaling'>
^(self new)
value: value;
signal: reason
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'unknown error'
]
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'Invalid value %1: %2' %
{self value.
self basicMessageText}
]
value [
"Answer the object that was found to be invalid."
<category: 'accessing'>
^value
]
value: anObject [
"Set the object that was found to be invalid."
<category: 'accessing'>
value := anObject
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: InvalidState [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a method and the receiver or an argument
are in an invalid state for the method.'>
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'%1 is in an invalid state: %2' %
{self value.
self basicMessageText}
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: NotIndexable [
<category: 'Language-Exceptions'>
<comment: 'I am raised when an object is not indexable.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'object not indexable'
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: ReadOnlyObject [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one writes to a read-only object.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'object is read-only'
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: EmptyCollection [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a method on an empty collection.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'the collection is empty'
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: InvalidArgument [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a method with an invalid argument.'>
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'Invalid argument %1: %2' %
{self value.
self basicMessageText}
]
]
]
Namespace current: SystemExceptions [
InvalidArgument subclass: AlreadyDefined [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one tries to define a symbol (class or pool variable) that
is already defined.'>
description [
"Answer a description for the error"
<category: 'accessing'>
^'symbol already defined'
]
]
]
Namespace current: SystemExceptions [
InvalidArgument subclass: ArgumentOutOfRange [
| low high |
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a method with an argument outside of its
valid range.'>
ArgumentOutOfRange class >> signalOn: value mustBeBetween: low and: high [
"Raise the exception. The given value was not between low and high."
<category: 'signaling'>
| errorString |
errorString := RegressionTesting
ifTrue: ['argument out of range']
ifFalse:
['argument must be between ' , low printString , ' and ' , high printString].
^(self new)
value: value;
low: low;
high: high;
signal: errorString
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'argument out of range'
]
low [
"Answer the lowest value that was permitted."
<category: 'accessing'>
^low
]
low: aMagnitude [
"Set the lowest value that was permitted."
<category: 'accessing'>
low := aMagnitude
]
high [
"Answer the highest value that was permitted."
<category: 'accessing'>
^high
]
high: aMagnitude [
"Set the highest value that was permitted."
<category: 'accessing'>
high := aMagnitude
]
]
]
Namespace current: SystemExceptions [
ArgumentOutOfRange subclass: IndexOutOfRange [
| collection |
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes am accessor method with an index outside of its
valid range.'>
IndexOutOfRange class >> signalOn: aCollection withIndex: value [
"The given index was out of range in aCollection."
<category: 'signaling'>
^(self new)
collection: aCollection;
value: value;
signal
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'index out of range'
]
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'Invalid index %1: %2' %
{self value.
self basicMessageText}
]
collection [
"Answer the collection that triggered the error"
<category: 'accessing'>
^collection
]
collection: anObject [
"Set the collection that triggered the error"
<category: 'accessing'>
collection := anObject
]
]
]
Namespace current: SystemExceptions [
InvalidArgument subclass: InvalidSize [
<category: 'Language-Exceptions'>
<comment: 'I am raised when an argument has an invalid size.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'invalid size'
]
]
]
Namespace current: SystemExceptions [
InvalidArgument subclass: NotFound [
<category: 'Language-Exceptions'>
<comment: 'I am raised when something is searched without success.'>
NotFound class >> signalOn: value what: aString [
"Raise an exception; aString specifies what was not found (a key,
an object, a class, and so on)."
<category: 'accessing'>
^(self new)
value: value;
signal: aString , ' not found'
]
NotFound class >> signalOn: value reason: aString [
"Raise an exception: reason specifies the reason of the exception."
<category: 'accessing'>
^(self new)
value: value;
signal: aString
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'not found'
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: WrongClass [
| validClasses |
<category: 'Language-Exceptions'>
<comment: 'I am raised when an argument is constrained to be an instance of a determinate
class, and this constraint is not respected by the caller.'>
WrongClass class >> signalOn: anObject mustBe: aClassOrArray [
"Raise an exception. The given object should have been an instance
of one of the classes indicated by aClassOrArray (which should be
a single class or an array of classes). Whether instances of
subclasses are allowed should be clear from the context, though
in general (i.e. with the exception of a few system messages)
they should be."
<category: 'signaling'>
(aClassOrArray isKindOf: Collection)
ifFalse: [^self signalOn: anObject mustBe: {aClassOrArray binding}].
^(self new)
validClasses: aClassOrArray;
value: anObject;
signal
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'wrong argument type'
]
messageText [
"Answer an exception's message text."
<category: 'accessing'>
self validClasses isNil
ifTrue: [^'Invalid argument ' , self value printString].
^'Invalid argument %1: must be %2' %
{self value.
self validClassesString}
]
validClasses [
"Answer the list of classes whose instances would have been valid."
<category: 'accessing'>
^validClasses
]
validClassesString [
"Answer the list of classes whose instances would have been valid,
formatted as a string."
<category: 'accessing'>
^String streamContents:
[:str |
validClasses keysAndValuesDo:
[:idx :classOrBinding |
| name class |
idx > 1
ifTrue:
[idx = validClasses size
ifFalse: [str nextPutAll: ', ']
ifTrue: [str nextPutAll: ' or ']].
class := classOrBinding isClass
ifTrue: [classOrBinding]
ifFalse: [classOrBinding value].
name := class nameIn: Namespace current.
name first isVowel
ifTrue: [str nextPutAll: 'an ']
ifFalse: [str nextPutAll: 'a '].
str nextPutAll: name]]
]
validClasses: aCollection [
"Set the list of classes whose instances would have been valid."
<category: 'accessing'>
validClasses := aCollection
]
]
]
Namespace current: SystemExceptions [
WrongClass subclass: MustBeBoolean [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one invokes a boolean method on a non-boolean.'>
MustBeBoolean class >> signalOn: anObject [
"Signal a new exception, with the bad value in question being
anObject."
<category: 'signaling'>
^self signalOn: anObject mustBe: #(#{Boolean})
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: ProcessTerminated [
<category: 'Language-Exceptions'>
<comment: 'I am raised when somebody tries to resume or interrupt a terminated process.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'process has/was already terminated'
]
]
]
Namespace current: SystemExceptions [
InvalidValue subclass: InvalidProcessState [
<category: 'Language-Exceptions'>
<comment: 'I am an error raised when trying to resume a terminated process, or
stuff like that.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'invalid operation for this process'
]
]
]
Namespace current: SystemExceptions [
Error subclass: MutationError [
<category: 'Language-Exceptions'>
<comment: 'I am an error raised when a class is mutated in an invalid way.'>
MutationError class >> new [
"Create an instance of the receiver, which you will be able to
signal later."
<category: 'instance creation'>
^self basicNew initialize: nil
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'cannot mutate the class this way'
]
]
]
Namespace current: SystemExceptions [
Error subclass: VMError [
<category: 'Language-Exceptions'>
<comment: 'I am an error related to the innards of the system.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'virtual machine error'
]
]
]
Namespace current: SystemExceptions [
VMError subclass: SecurityError [
| failedPermission |
<category: 'Language-Exceptions'>
<comment: 'I am an error raised when an untrusted object tries to do an insecure
operation.'>
SecurityError class >> signal: aPermission [
"Raise the exception, setting to aPermission the permission
that was tested and failed."
<category: 'accessing'>
^(self new)
failedPermission: aPermission;
signal
]
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'insecure operation in an untrusted context'
]
failedPermission [
"Answer the permission that was tested and that failed."
<category: 'accessing'>
^failedPermission
]
failedPermission: anObject [
"Set which permission was tested and failed."
<category: 'accessing'>
failedPermission := anObject
]
]
]
Namespace current: SystemExceptions [
VMError subclass: VerificationError [
<category: 'Language-Exceptions'>
<comment: 'I am raised when the verification of a method fails.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'a method did not pass the bytecode verification process'
]
]
]
Namespace current: SystemExceptions [
VMError subclass: BadReturn [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one tries to return from an already-terminated method.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'return from a dead method context'
]
]
]
Namespace current: SystemExceptions [
VMError subclass: UserInterrupt [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one presses Ctrl-C.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'interrupted!!!'
]
]
]
Namespace current: SystemExceptions [
VMError subclass: NoRunnableProcess [
<category: 'Language-Exceptions'>
<comment: 'I am raised when no runnable process can be found in the image.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'no runnable process'
]
]
]
Namespace current: SystemExceptions [
VMError subclass: PrimitiveFailed [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a primitive fails for some reason.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'primitive operation failed'
]
]
]
Namespace current: SystemExceptions [
PrimitiveFailed subclass: WrongArgumentCount [
<category: 'Language-Exceptions'>
<comment: 'I am raised when one tries to evaluate a method (via #perform:...) or a
block but passes the wrong number of arguments.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'wrong number of arguments'
]
]
]
Namespace current: SystemExceptions [
PrimitiveFailed subclass: CInterfaceError [
<category: 'Language-Exceptions'>
<comment: 'I am raised when an error happens that is related to the C interface.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'error in the C-language interface'
]
]
]
Namespace current: SystemExceptions [
PrimitiveFailed subclass: FileError [
<category: 'Language-Exceptions'>
<comment: 'I am raised when an error happens that is related to the file system.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'file system error'
]
]
]
Namespace current: SystemExceptions [
Error subclass: NotImplemented [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a method is called that has not been implemented.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'method is not implemented'
]
]
]
Namespace current: SystemExceptions [
NotImplemented subclass: NotYetImplemented [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a method is called that has not been implemented yet.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'not yet implemented'
]
]
]
Namespace current: SystemExceptions [
NotImplemented subclass: ShouldNotImplement [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a method is called that a class wishes that is not
called.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'should not be implemented in this class'
]
]
]
Namespace current: SystemExceptions [
ShouldNotImplement subclass: WrongMessageSent [
| selector suggestedSelector |
<category: 'Language-Exceptions'>
<comment: 'I am raised when a method is called that a class wishes that is not
called. This exception also includes a suggestion on which message
should be sent instead'>
WrongMessageSent class >> signalOn: selector useInstead: aSymbol [
"Raise an exception, signaling which selector was sent and suggesting
a valid alternative."
<category: 'signaling'>
^(self new)
selector: selector;
suggestedSelector: aSymbol;
signal
]
messageText [
"Answer an exception's message text."
<category: 'accessing'>
^'%1, use %2 instead' %
{self basicMessageText.
self suggestedSelector storeString}
]
selector [
"Answer which selector was sent."
<category: 'accessing'>
^selector
]
selector: aSymbol [
"Set which selector was sent."
<category: 'accessing'>
selector := aSymbol
]
suggestedSelector [
"Answer a valid alternative to the selector that was used."
<category: 'accessing'>
^suggestedSelector
]
suggestedSelector: aSymbol [
"Set a valid alternative to the selector that was used."
<category: 'accessing'>
suggestedSelector := aSymbol
]
]
]
Namespace current: SystemExceptions [
ShouldNotImplement subclass: SubclassResponsibility [
<category: 'Language-Exceptions'>
<comment: 'I am raised when a method is called whose implementation is the responsibility
of concrete subclass.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'method is responsibility of a subclass'
]
]
]
Namespace current: SystemExceptions [
Exception subclass: UnhandledException [
| originalException |
<category: 'Language-Exception'>
<comment: 'I am raised when a backtrace is shown to terminate the
current process.'>
description [
"Answer a textual description of the exception."
<category: 'accessing'>
^'an unhandled exception occurred in the current process'
]
defaultAction [
"Terminate the current process."
<category: 'accessing'>
| debugger debuggerClass context |
Transcript flush.
debugger := Processor activeDebugger.
debugger isNil ifFalse: [^debugger stopInferior: self messageText ].
debuggerClass := thisContext debuggerClass.
debuggerClass isNil
ifFalse: [^debuggerClass open: self originalException creator printString , ' error: ' , self messageText ].
"Default behavior - print backtrace"
RegressionTesting ifFalse: [self originalException creator basicPrint].
Transcript
nextPutAll: ' error: ';
display: self messageText;
nl.
RegressionTesting
ifFalse:
[context := thisContext.
[context isInternalExceptionHandlingContext]
whileTrue: [context := context parentContext].
context backtraceOn: Transcript].
thisContext environment continue: nil
]
instantiateDefaultHandler [
"Private - Fill the receiver with information on its default handler."
<category: 'private'>
| signalingContext resumeContext |
"This exception is kind of special, as we forcedly have to find
a place to resume---even if the exception was not resumable!
This typically will happens when the user steps out of the
exception handling gobbledegook in the debugger."
signalingContext := thisContext.
[resumeContext := signalingContext parentContext.
resumeContext isEnvironment not
and: [resumeContext isInternalExceptionHandlingContext]]
whileTrue: [signalingContext := resumeContext].
self
onDoBlock: nil
handlerBlock: [ :ex | ex defaultAction ]
onDoContext: signalingContext
previousState: nil
]
originalException [
"Answer the uncaught exception."
<category: 'accessing'>
^originalException
]
originalException: anObject [
"Set the uncaught exception to anObject."
<category: 'accessing'>
originalException := anObject
]
]
]
Namespace current: Kernel [
Notification subclass: TimeoutNotification [
| delay |
<category: 'Language-Implementation'>
<comment: 'I get send by the timeout handling of a Delay
and I am the indication that the time is up and that one should come
to an end.'>
TimeoutNotification class >> on: aDelay [
<category: 'creation'>
^ self new
delay: aDelay; yourself
]
delay: aDelay [
<category: 'private'>
delay := aDelay
]
delay [
<category: 'private'>
^ delay
]
isResumable [
<category: 'private'>
^ false
]
defaultAction [
"We are not resumable, so do nothing. This should really never happen."
<category: 'exception description'>
]
]
]
Number extend [
arithmeticError: msg [
"Raise an ArithmeticError exception having msg as its message text."
<category: 'error raising'>
^ArithmeticError new signal: msg
]
zeroDivide [
"Raise a division-by-zero (ZeroDivide) exception whose dividend
is the receiver."
<category: 'error raising'>
^(ZeroDivide dividend: self) signal
]
]
Object extend [
doesNotUnderstand: aMessage [
"Called by the system when a selector was not found. message is a
Message containing information on the receiver"
"aMessage inspect."
"thisContext parentContext method inspect."
"ObjectMemory abort."
<category: 'error raising'>
^(MessageNotUnderstood new)
message: aMessage receiver: self;
signal
]
error: message [
"Display a walkback for the receiver, with the given error message.
Signal an `Error' exception."
<category: 'error raising'>
^Error new signal: message
]
halt: message [
"Display a walkback for the receiver, with the given error message.
Signal an `Halt' exception."
<category: 'error raising'>
^Halt new signal: message
]
]
Eval [
SystemExceptions.ProcessBeingTerminated initialize
]
|