TOPS-20 PASCAL Language Manual - Bitsavers

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ISO CO~PLIANCE The DISPOSE procedure is calJed to dispose of a heap-allocated variable while a reference to the variable exists. Explanation: Not detected. Examples of such references are: passing the variable or a component of it to a formal VAR parameter, or using the variable in a WJTH statement (if the variable is a record). The value of file f changes while a reference to f~ exists. Explanation: Not detected. An example of a reference to f~ is the passing of f- by reference to a routine; until the routine has ceased execution, you may not perform any operation on file f. The ordinal type of an actual parameter is not assignment compatible with the type of the corresponding formal parameter. Explanation: Detected at run time if checking was enabled during compilation of the called routine. The set type of an actual parameter is not assignment compatible the type of the corresponding formal parameter. with Explanation: Detected at run time if checking was enabled during compilation of the called routine. A file is not in Generation mode when a PUT, WRITE, WRITELN, or PAGE procedure is attempted. Explanation: Detected at run time. A file is in Undefined mode when a PUT, WRITE, WRITELN, or PAGE procedure is attempted. Explanation: Detected at run time. The result of an EOF function is not TRUE when a PUT, WRITE, or PAGE procedure is attempted. WRITELN, Explanation: Detected at run time. The value of the file buffer variable is undefined when a PUT procedure is attempted. Explanation: Not detected. A file is in Undefined mode when a RESET procedure is attempted. Explanation: Not detected. A file is not in Inspection mode when a GET, READ, or READLN procedure is attempted. Explanation: Detected at run time. A file is in Undefined mode when a GET, READ, or READLN procedure is attempted. Explanation: Detected at run time. The result of an EOF function is TRUE when a GET, procedure is attempted. READ, or READLN Explanation: Detected at run time. E-4
ISO COMPLIANCE The type of the file buffer is not assignment compatible with the type of the variable that is a parameter to a READ or READLN procedure. Explanation: Detected at run time if checking is enabled during compilation at the READ or READLN. The type of the expression being written procedure is not assignment compatible buffer variable. by with a WRITE or WRITELN the type of the file Explanation: Detected at run time if checking is enabled during compilation of the WRITE or WRITELN. The current variant does not exist in the list of with the NEW procedure. variants specified Explanation: Not detected. The DISPOSE(p) procedure is called to deallocate a pointer variable that was created using the variant form of the NEW procedure. Explanation: Not detected. The variant form of the DISPOSE disposal of the same number of variant form of the NEW procedure. procedure does not specify the variants that were created by the Explanation: Not detected. The variant form of the DISPOSE procedure does not specify the disposal of the same variants that were created by the variant form of the NEW procedure. Explanation: Not detected. The value of the parameter to the DISPOSE procedure is NIL. Explanation: Detected at run time. The value of the parameter to the DISPOSE procedure is undefined. Explanation: Usually detected at run time. A variant record created by the NEW procedure is accessed as a rather than one component at a time. whole, Explanation: Not detected. In the PACK(a,i,z} procedure, the type of the index value i is not assignment compatible with the index of a. Explanation: Not detected. The PACK procedure is attempted when the value of at least one component of a is undefined. Explanation: Not detected. The index value i in the PACK procedure is greater than the upper bound of the index of a. Explanation: Not detected. E-5
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TOPS-20 PASCAL Language Manual AA-L
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CONTENTS PREFACE CHAPTER 1 INTRODUC
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7 • 1 . 1 7 . 1 . 2 7 • 1 . 3 7
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G-l G-2 G-3 G-4 Status of Stack Aft
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• Appendix A lists the various me
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CHAPTER I INTRODUCTION PASCAL-20 is
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PROGRAM Calculator (INPUT, OUTPUT);
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INTRODUCTION 1.1.6 Compilation Unit
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INTRODUCTION 1.2.3 Identifiers PASC
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INTRODUCTION The semicolon and the
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INTRODUCTION In the following examp
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CHAPTER 2 PASCAL DATA TYPES This ch
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PASCAL DATA TYPES In addition to de
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PASCAL DATA TYPES You can use strin
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PASCAL DATA TYPES The base type can
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PASCAL DATA TYPES is BOOLEAN, then
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PASCAL DATA TYPES In the three-dime
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PASCAL DATA TYPES To assign values
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PASCAL DATA TYPES 2.3.1.5 Array Exa
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PASCAL DATA TYPES The fields in thi
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PASCAL DATA TYPES 2.3.2.2 Assigning
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PASCAL DATA TYPES For example, assu
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PASCAL DATA TYPES Sets are compatib
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PASCAL DATA TYPES Example 3 F I 1..
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PASCAL DATA TYPES Pointer type defi
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PASCAL DATA TYPES Example 2 VAR Cit
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EXPRESSIONS Table 3-1: Arithmetic O
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EXPRESSIONS TabJe 1-2: Result Types
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EXPRESSIONS The set operators (+, *
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EXPRESSIONS PROGRAM Level_.O (IN PU
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CHAPTEH 4 PROGRAM HEADING AND DECLA
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PROGRAM HEADING AND DECLARATION SEC
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PASCAL STATEMENTS Simple and compou
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PASCAL STATEMENTS Example q Ase~5 :
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PASCAL STATEMENTS The objects of th
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PASCAL STATEMENTS Example 1 CASE EN
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PASCAL STATE~ENTS Example 4 := 1 TO
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PASC~L STATEMENTS 5.5 THE WITH STAT
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PASCAL STATEMENTS Example FOR I :=
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CHAPTER ~ PROCEDURES AND FUNCTIONS
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PROCEDURES AND FUNCTIONS Table ~-l:
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PROCEDURES AND FUNCTIONS Table ~-1:
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PROCEDURES AND FUNCTIONS This progr
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PROCEDURES AND FUNCTIONS You can al
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PROCEDURES AND FUNCTIONS This progr
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PROCEDURES AND FUNCTIONS Boolean fu
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PROCEDURES AND FUNCTIONS Table h-3:
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PROCEDURES AND FUNCTIONS Data items
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PROCEDURES AND FUNCTIONS The actual
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PROCEDURES AND FUNCTIONS An optiona
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PROCEDURES AND FUNCTIONS Example 1
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PROCEDURES AND FUNCTIONS Fo rma t 1
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PROCEDURES AND FUNCTIONS As a resul
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PROCEDURES AND FUNCTIONS label sect
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PROCEDURES AND FUNCTIONS The functi
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PROCEDURES AND FUNrTIONS Example 1
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CHAPTER 7 INPUT AND OUTPUT This cha
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INPUT AND OUTPUT In executing this
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INPUT AND OUTPUT where: file variab
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INPUT AND OUTPUT When you reach the
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INPUT AND OUTPUT To specify only th
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INPUT AND OUTPUT 7.7.4 Record Type
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INPUT AND OUTPUT This example cause
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INPUT AND OUTPUT 7.9 THE PUT PROCED
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INPUT AND OUTPUT READ does not read
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INPUT AND OUTPUT This program fragm
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INPUT AND OUTPUT You must call REWR
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INPUT AND OUTPUT The following rule
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INPUT AND OUTPUT This example write
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INPUT l\ND OUTPUT Example 1 BEGIN W
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INPUT AND OUTPUT The first referenc
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USING PASCAL ON TOPS-20 8.2 FILE SP
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USING PASCAL ON TOPS-20 After plann
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USING P~SCAL ON TOPS-20 /TAKE The /
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USING PASCAL ON TOPS-20 If you omit
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USING PASCAL ON TOPS-20 The first c
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• AVERAGE SCORE SOURCE LISTING o
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USING PASCAL ON TOPS-20 The compile
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USING PASCAL ON TOPS-20 8.4.6.3 Cro
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USTNG PASCAL ON TOPS-20 Example 3 f
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PASDDT: THE PASCAL-20 DEBUGGER 9.3
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PASDDT: THE PASCAL-?O DEBUGGER cons
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PASDDT: THE PASCAL-20 DEBUGGER As s
Page 182 and 183: PASDDT: THE PASCAL-20 DEBUGGER Note
Page 186 and 187: PASDDT: THE PAS~AL-20 DEBUGGER ]. T
Page 190 and 191: P~SDDT: THE PASCAL-?O DEBUGGER To r
Page 193 and 194: ._------------- Table A-I: Run-time
Page 195 and 196: PASCAL MESSAGES -------------------
Page 197 and 198: PASCAL MESSAGES ? PASOl7 "BEGIN" ex
Page 199 and 200: PASCAL MESSAGES ? PASIOS Sign not a
Page 201 and 202: PASCAL MESSAGES ? PAS130 Expression
Page 203 and 204: PASCAL MESSAGES ? PAS157 Case label
Page 205 and 206: PASCAL MESSAGES ? PAS184 External p
Page 207 and 208: PASCAL MESSAGES ? PAS?II Incorrect
Page 209 and 210: PASCAL MESSAGES ? PAS253 Too many a
Page 211: PASCAL MESSAGES % PAS457 Nonstandar
Page 214 and 215: ASCII CHARACTER SET Table 8-1: The
Page 217 and 218: APPENDIX C SYNTAX SUMMARY This appe
Page 219 and 220: SYNTAX Sm1MARY ::= I I I I
Page 221 and 222: SYNTAX Sur~MARY ::= := ::= I
Page 223 and 224: SYNTAX SU~1MARY ::= ft ::= ::=
Page 225: SYNTAX SUr-1MARY ""= ::= ,
Page 228 and 229: -------- ---- ---- ----------------
Page 230 and 231: ISO COMPLIANCE 4. A program paramet
Page 234 and 235: ISO COMPLIANCE In the UNPACK(z,i. ,
Page 236 and 237: ISO COMPLIANCE In a FOR statement,
Page 239 and 240: APPENDIX F DIFFERENCES BETWEEN PASC
Page 241 and 242: DIFFERENCES BETWEEN PASCAL-20 AND V
Page 243 and 244: APPENDIX G PROCEDURE AND FUNCTION C
Page 245 and 246: PROCEDURE AND FUNCTION CALLING SEQU
Page 247 and 248: PROCEDURE ~ND FUNCTION CALLING SEQU
Page 249 and 250: INDEX /ABORT switch, 8-7 ABS functi
Page 251 and 252: Function (Cont.) EOF, 1-7, 6-14 EOL
Page 253: INDEX (Co n t. ) Set operator, 1-8,
Page 256: - Do Not Tear - Fold Here and Tape
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