Newsletter #9-#10 - Moorecad.com

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JORGEN STAUNSTRUP 90007 NOBUKI TOKURA 500 JAPAN KEVIN WEILER 14850 ROD STEEL 97077 HOWARDE. TOMPKINS 15701 RUTH WEINBERG ISRAEL -0 EDWARD STEEN 01852 SEVED TORSTENDAHL S-145 72 SWEDEN ):> LEONARD H. WEINER 79409 GORDONA. STEGINK 49401 ALFRED I. TOWELL 47401 C/) STEVEN W. WEINGART 55113 HAL STEIN 47401 STEVEN N. TRAPP 55421 DIETER WEISS D-6300 GERMANY n GERALD STEINBACK 29208 MARTIN VERGES TRIAS 14 SPAIN DONALD G. WEISS 78721 ):> ALBERT STEINER 60201 EDWIN TSE H9R 1G1 CANADA , ANTHONY B. WELLER WC1H OAH UNITED KINCDOM WARREN STENBERG 55416 CASEYTUBBS 32901 ROBERTE. WELLS 02138 VIC STENNING GU16 5HJ UNITED KINGDOM JOHN TUCKER 79601 JIM WELSH BT7 1NN UNITED KINGDOM = PHILIP STEPHENSON 76019 W. TYLER fT1 95060 JOHN WERTH 89154 CALVIN STEVENS 55422 ASHOK N. ULLAL :::e: D-7408 GERMANY JOHN P. WEST 30332 C/) W. RICHARD STEVENS 85726 BRIAN W. UNGER T2N 1N4 CANADA RICHARD WEST H9R 1G1 CANADA lAIN STINSON SW7 2A2 UNITED KINGDOM JOHN URBANSKI 55455 TERRY E. WEYMOUTH 60532 ~ANNESTOCCO N1G 2W1 CANADA TOM URSIN 55440 WILLIAM A. WHITAKER 22209 l.D A. I. STOCKS 70504 INDULIS VALTERS 55406 GRAHAM J. WHITE M20 9QL UNITED KINGDOM JERRY STODDARD 55440 J. J. VAN AMSTEL THE NETHERLANDS B. WI LLIAML BN3 1RA UNITED KINGDOM JOHN P. STRAIT 55455 G. E. VAN BEINUM "" THE NETHERLANDS E. HAROLD WILLIAMS 95051 ~GEORGEO. STRAWN 50011 WARREN VAN CAMP 94041 GEORGE H. WILLIAMS 12308 JOHN N. STRAYHORN 02139 ANDRIES VAN DAM f-' 02912 JAMES C. WILLIAMS 59717 EDWARDP. STRITTER 78721 R. P. VAN DE RIET THE NETHERLANDS JOHN H. WILLIAMS 14850 ROBERT A. STRYK 55424 TOM VAN DER HOEVEN THE NETHERLANDS KENNETH L. WILLIAMS 75081 GORDON STUART V8P 5J2 CANADA P. J. VAN DER HOFF THE NETHERLANDS M. H. WILLIAMS 6140 SOUTH AFRICA PETER R. SUMNER 6005 AUSTRALIA PATRICIA VAN DERZEE 45036 W. H. L. WILLIAMS N10 UNITED KINGDOM MARKKU SUNI SF-20500 FINLAND H. VAN LOON THE NETHERLANDS S. WILLIAMSON N6A 5B 7 CANADA EDWARD W. SUOR 14609 FRANCES L. VAN SCOY 23508 ARTHUR C. WILLIS 94086 SILVIA SUSSMAN WC1 UNITED KINGDOM T. J. VAN WEERT 9321 THE NETHERLANDS SAM WILMOTT K1S 5G3 CANADA LARS SVENSSON S-281 00 SWEDEN FERNANDO ANTONIO VANINI 13100 BRAZIL ROY A. WILSKER 02154 RALPH W. SWEARINGEN 94596 M. W. VANNIER 40506 ARDOTH H. WILSON 73034 S. D. SWIERSTRA THE NETHERLANDS WILLIAM J. VASILIOU JR. 03824 DENIS M. WILSON AB9 2UB UNITED KINGDOM ADA SZER A-1040 AUSTRIA JEAN VAUCHER H3C 3J7 CANADA J. WILSON 13032 C/) MENACHEMSZUS ISRAEL ROBERT D. VAVRA 55113 GARY W. WINIGER 94088 fT1 PREBEN TAASTI DK-9000 DENMARK JAMES A. VELLENGA 55440 GREGORY J. WINTERHALTER 48130 -0 RICHARD TABOR 20052 B. VENKATESAN T2N 1N4 CANADA NIELS WINTHER DK-2650 DENMARK -! MASATO TAKEICHI 182 JAPAN P. VERBAETEN B-3030 BELGIUM HANS-WILM WIPPERMANN D-6 750 GERMANY fT1 RAMON TAN 18104 JIM VERNON 55440 NIKLAUS WIRTH CH-8092 SWITZERLAND 3: ANDREW S. TANENBAUM THE NETHERLANDS STANLEY C. VESTAL 55413 DAVID S. WISE 47401 t:C DAVID TARABAR 01701 STEPHEN J VNUK 18651 JOHN M. WOBUS 13210 fT1 H. TAYLOR K1N 6N5 CANADA EIITI WADA 113 JAPAN LOUIS F. WOJNAROSKI 48109 ;;C JANET TAYLOR 75275 KENNETH R. WADLAND 01420 DAVID WOLFE 97217 RICHARD N. TAYLOR 98055 KAREN WAGGONEK 55455 DARRELL L. WONDRA 55112 WILLIAM P. TAYLOR 94550 THOMAS WAGNER D-1000 GERMANY f-' GORDON J. WOOD 92122 MICHAEL TEENER 90403 S. P. J. WAGSTAFF LA1 4YX UNITED KINGDOM l.D WILLIAM T. WOOD 55421 DOUG TEEPLE V6X 2Z9 CANADA JOHN E. WAdL 85731 JAMES A. WOODS 94703 'J PAUL R. TEETOR 48106 M. WAITE 11740 JOHN D. WOOLLEY 98006 'J ROBERT TEISBERG 64108 WILLIAM M. WAITE 80309 . DONALD L. WRIGHT 17011 T. D. TELFORD 94088 A. R. M. WAJIH PE17 3QB UNITED KINGDOM ROGER P. WRIGHT RG6 2LH UNITED KINGDOM R. D. TENNENT K7L 3N6 CANADA TERRY M. WALKER 70504 JACOB C. Y. WU 20910 TED TENNY 13676 BOB WALSH 87106 WALTER WUENSCH 13323 DANIEL TRALMANN CH-1200 SWITZERLAND LARRY WALSH 95050 MARYLENE WUEST CH-1211 SWITZERLAND R. L. THAYER 01451 PATRICK WARD H3C 3J7 CANADA NICHOLAS WYBOLT '07205 DIDIER THIBAULT F-75005 FRANCE DAVID M. WARNER 80215 URS R WYSS CH-1205 SWITZERLAND DAVE THOMAS SW7 ZAZ UNITED KINGDOM SCOTT K. WARREN 77098 CHI YIP LA1 4YX UNITED KINGDOM GAY THOMAS 39762 WARREN J. WARWICK 55455 SUSUMU YOSHIMURA 210 JAPAN RAYMOND E. THOMAS 20052 MASARU WATANABE 222 JAPAN KENNETH YOUNG 90020 RICK THOMAS 20012 MARK S. WATERBURY 22152 RAYMOND YOUNG 55165 RON THOMAS 55425 JOE WATKINS 80302 STEPHEN W. YOUNG 47401 LARS-ERIK THORELLI S-100 44 SWEDEN DAVID WATT G12 8QQ UNIT ED KINGDOM L. W. YOUNGREN 55901 EDWARDO. THORLAND 52101 GEOFF WATTLES 55104 GIDEON YUVAL ISRAEL -0 LAVINE THRAILKILL 40506 VINCENT B. WAYLAND 80303 RUSSELL W ZEARS 77550 ):> BENGT THYLEN S-341 00 SWEDEN JOHN A. WEAVER 18018 G) PETER H. ZECHMEISTER 55455 H. F. TIBBALS DH1 3LE UNITED KINGDOM ANDERS WEBER DK-2300 DENMARK H. J. ZELL NW3 UNITED KINGDOM fT1 MIKE TILLER 55441 HELLMUT WEBER D-8000 GERMANY ANDREW HARRIS ZIMMERMAN 94086 HERVE TIREFORD CH-1211 SWITZERLAND NEIL W. WEBRE 93401 \.N E. C. ZIMMERMAN 44691 ALAIN TISSERANT F-54042 FRANCE WALLY WEDEL 78712 ex> JOAN ZIMMERMAN 63110 STEPHEN TITCOMB 18017 WALTER WEHINGER D-7000 GERMANY KARL L. ZINN 48109 JEFFREY TOBIA~ 2232 AUSTRALIA REINHOLD WEICKER D-8551 GERMANY TOM ZWITTER 44139
Pascal at Sydney University -2- A.J.Gerher C.C.Morgan 1.5 Glitter a. A dayfile message has been added to provide timing information. ~. Introduction The temptation to "playll with software is more often than not too great to resist, and we succumbed. Our experience (over 12 months) with our changes has given us confidence in them, and only a few of our original mods have been retracted. We are also pleased to add that users seem more than happy to use these "extra II features, and that we often have to turn away requests for the more fanciful changes which do get proposed from time to time. We do realise that Pascal is deliberatelydesigned to be minimal, efficiently implementable and so on. We also have some rather strong views on where the absence of certain features actually ~ many y programmers, as opposed to those features which are genuinely used rarely by a small group of users (which does not include ourselves). 1. Implementation-dependent/orientedfeatures 1.1 KRONOS-orientedchanges Necessary as always. In particular, allowing INPUT & OUTPUT to operate interactively under TELEX; and letting the compiler accept line numbers (sequence numbers) on source files. b. An option (*$W!*)provides warnings if any of the language extensions detailed below are used by the programmer. The default setting is lion!!. 2. Lanquaqe-orientedextensions I Most of the language "extensions"detailed below do not, we believe, run contrary to the "spiritllof Pascal. They were all implementedquite cheaply and with little or no effect on compiler efficiency. Our experience with them has vindicated them at least as far as we are concerned. 2.1 Readinq strings The standard procedure "readllis extended so that variables of type IIstring" (i.e.packed arrays of char) may be read. The definition is as follows: if f is a textfile, and s a string variable, then "read(f,s)"is equivalent to: for i := 1 ~ n do beqin sri] := ft , if not ..oln(f) then get(f) end; 1.2 Listing format Note that read(f,s) never does a "get(f)1Iwhen eoln(f) is true. Hence it never causes a "readln(f)",and in addition it right-fills incompletely-readstrings A listing format modelled after the 1972 Stanford Algol W implementation was adopted. Particularly valuable is the ability for programmers to check BEGIN-END, with blanks. etc. nesting with level indicators on the left-hand side of" the listing. $-cards 2.2 Reading and writinq symbolic scalar types (lines with a '$1 in the first column) may be used to control the listing's spacing, titling, paging, etc. A more interesting $-card is the II$INCLUDE " It is possible in our version to read and write symbolic scalar variables which allows source text from other files to be interspersed within the main source (RED,GREN,BLUE;...;CAT,DOG,MOUSE;...;TRUE,FALSE etc.). This allows the language file. 1.3 For the benefit of student users to be more generous in its treatment of scalar variables - most users complain of the absence of this feature at one time or another. An additional benefit is that the post-mortem dump can now really dump such variables. Some more checking facilities have been added. There is a compile-time check against the assignment of a value to a for-loop control variable. The $T+ option has the added effect of initializing the stack at run-time to l777~~~~~~~~~~377776B's. This allows hardware checking for undefined reals and (most)pointers. An oversight in Pascal-600Q-3.4.was corrected: a check is made that during a IIreadll a subrange-typedvariable is not assigned an out-of-bounds value. The post-mortem dump was reformatted to make it a little more informative and easier to read. In addition, a procedure which invokes PMD, but then continues execution, has been added to the library ("SNAFII). 2.3 Case-statementrevamp These extensions are arguably at odds with Pascal's "minimal language II philosophy, but turn out to be incredibly useful. They are: (i) the addition to the case-statementlabel list of a constant "range", and (ii) the addition of a IIdefault"label. The first of these is surprisingly absent from standard Pascal in view of the recent addition of constant ranges in the syntax of sets (e.g. [1..9]). We have a sneaking suspicion that this was not implementedbecause the Pascal-6000 lexical analyser maps colon (:) and dot-dot (..) into the same internal symbol, thus making compilation of things like 1.4. Fieldlength handling case i of A different FL-handling discipline is implemented. The user may preset his ~,2. .l~ -;12: begin .... run-time FL at compile-timeby use of the (*$FLxxxxx*)control comment. This has rather awkward for a one-symbol-lookabeadcompiler. Our (ad hoc) solution was to the effectof forcingtheprogram(at run-time)to graban amountof coreequalto use the word symbol to in place of "..11here. The default label is represented by its code space, plus "xxxxx". The default setting is: else and is executed-rf no constant satisfies the evaluation of the case-expression. run-time FL = code space + size(global-data-seg)+ 2~~B. A typical example is: These settings may, of course, always be overridden at run-time by not running in REDUCE mode. case ch of ~to IZI , , Articles 'j2J1 to 19' else
Page 1 and 2: PASCAL USER'S GROUP Pascal. News (F
Page 3 and 4: PASCAL USER'S GROUP USER'S ALL PURP
Page 5 and 6: ) l5i1 UNIVERSITY OF MINNESOTA Univ
Page 7 and 8: teatures and strengths of Pascal, a
Page 9 and 10: Peter Rouschmayer, Luitpold~YlIDasi
Page 11 and 12: Bowles, Ken (U. of Calif., San Dieg
Page 13 and 14: PAST ISSUES OFPascal Newsletter (no
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Page 37 and 38: RICHARD KIMBALL KAY HARRISON N2L 3G
Page 39: ) SHMUEL PELEG M. A. PELL HAL PERKI
Page 43 and 44: On exit from any procedure, the who
Page 45 and 46: Generic '~outines ana variaole Tyoe
Page 47 and 48: Generic ~outines ana Variable Types
Page 49 and 50: Dear Andy, The U ni versi ty of Tas
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Page 53 and 54: !Ii 1455 de Maisonneuve Blvd. West
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Page 57 and 58: SCCSINTERFACE The International Pub
Page 59 and 60: FROM THE EDITOR'S DESK Dear TO: And
Page 61 and 62: 9.1. 3 9.2.2 9.2.3.3 10 10.1 10.1.
Page 63 and 64: SOFTWARE TOOLS Therehas beenmuch di
Page 65 and 66: PASCAL VARIANTS Paacal-S A descript
Page 67 and 68: The set of char The PASCAL set cons
Page 69 and 70: Undefinition The definition (and th
Page 71 and 72: NOTE TO PUGN temp1 :=e1; INTERIM RE
Page 73 and 74: \ I Variable-parameters in Pascal .
Page 75 and 76: MACHINE DEPENDENT IMPLEMENTATIONS -
Page 77 and 78: 6. MAINTENANCE. (* No informationpr
Page 79 and 80: ) CDC STAR-100 (NASA) -------------
Page 81 and 82: 2. Machine: Cray Research, Inc. CRA
Page 83 and 84: Data General NOVA 840 (Barcelona) t
Page 85 and 86: Dear DEC PDP-ll (ESI) ------ Andy:
Page 87 and 88: he comoilers are ~ritten irl Pascal
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UNIVERSITAT HAMBURG IN STITUT FC R
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(7) End of file: In PASCAL EOF is n
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the runtime syst",m. 'I'heuse of ex
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. 6. MAINTENANCE. Supported by HIS.
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(iv) A 'loop' statement, specifying
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compiler. Release 2.5 incorporates
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10. DEVELOPMENT METKOD. Based on Pa
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9. RELIABILITY. The reliabilityof t
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6. MAINTENANCE. (* no information p
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Siemens 330. ------- KERNFORSCHUNGS
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TERAK 8510 (San Diego) ------------
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The University of Wisconsin-Madison
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POLICY: PASCAL USER'S GROUP (77/09/
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