AutoLISP Developer's Guide (.pdf) - Documentation & Online Help

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Equality and conditional functionsFunctionDescription(eq expr1 expr2)Determines whether two expressions areidentical(equal expr1 expr2 [fuzz])Determines whether two expressions are equal(if testexpr thenexpr [elseexpr])Conditionally evaluates expressions(or [ expr ...])Returns the logical OR of a list of expressions(repeat int [ expr ...])Evaluates each expression a specified numberof times, and returns the value of the last expression(while testexpr [ expr ...])Evaluates a test expression, and if it is not nil,evaluates other expressions; repeats this processuntil the test expression evaluates to nilError-Handling FunctionsThe following table provides summary descriptions of the AutoLISPerror-handling functions.Error-handling functionsFunctionDescription(alert string)Displays an alert dialog box with the error orwarning message passed as a string(*error* string)A user-definable error-handling function(exit)Forces the current application to quit(quit)Forces the current application to quit126 | Chapter 3 Appendixes
Error-handling functionsFunctionDescription(vl-catch-all-apply ' function list)Passes a list of arguments to a specified functionand traps any exceptions(vl-catch-all-error-messageerror-obj)Returns a string from an error object(vl-catch-all-error-p arg)Determines whether an argument is an error objectreturned from vl-catch-all-applyFunction-Handling FunctionsThe following table provides summary descriptions of the AutoLISPfunction-handling functions.Function-handling functionsFunctionDescription(apply function lst)Passes a list of arguments to a specified function(defun sym ([ arguments][/ variables...]) expr ...)Defines a function(defun-q sym ([ arguments][/ variables...]) expr ...)Defines a function as a list (intended for backwardcompatibilityonly)(defun-q-list-ref ' function)Displays the list structure of a function defined withdefun-q(defun-q-list-set 'sym list)Defines a function as a list (intended for backwardcompatibilityonly)(eval expr)Returns the result of evaluating an AutoLISP expressionAutoLISP Function Synopsis | 127
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AutoCAD 2012 for MacAutoLISP Develo
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ContentsChapter 1 Introduction . .
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Selection Set Filter Lists . . . .
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Introduction1IntroductionFor years,
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Using the AutoLISPLanguage2AutoLISP
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A common mistake is to omit the clo
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StringsA string is a group of chara
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Symbols and VariablesAutoLISP uses
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■Make notes to yourself during de
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NOTE You can change the value of th
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(setq filnam "bigfile.txt")"bigfile
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Exiting QuietlyIf you invoke the pr
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Wild-Card MatchingThe wcmatch funct
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Several AutoLISP functions provide
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To assign particular coordinates to
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caaarcadarcdaarcddarcaadarcaddarcda
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Symbol and Function HandlingAutoLIS
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; error: Invalid attempt to access
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expression can perform some evaluat
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that your applications use the buil
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1bbb2In addition to ensuring that v
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■■■■■■■QUOTEREPEATSET
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In this message, text describes the
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(print "Okay, I'll keep going")))(p
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If AutoCAD for Mac is at the Comman
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WARNING The Radius and Diameter sub
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Configuration ControlAutoCAD for Ma
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to display before the function paus
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The getangle function honors the se
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methods for abbreviating keywords;
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AutoLISP Function Synopsis, (page 1
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"2D") (100 . "AcDbEntity") (67 . 0)
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functions. The result is correct on
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(setq fmtval (rtos x 3 2)) ; Mode 3
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(princ (strcat str2 fmtval)) ;displ
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)(defun C:ASCII ( / chk out ct code
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acad.unt are in ASCII format and ar
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Coordinate System TransformationsTh
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Coordinate system codesCodeCoordina
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command line prompt for a file name
Page 82 and 83: The following table shows examples
Page 84 and 85: SSGET examples using filter listsFu
Page 86 and 87: Filtering for Extended DataUsing th
Page 88 and 89: ■You cannot use the relational op
Page 90 and 91: last entities in the current drawin
Page 92 and 93: (setq var1 (ssget))(setq var2 (adsf
Page 94 and 95: The following code fragment uses ha
Page 96 and 97: In the following example, create a
Page 98 and 99: The following statement stores the
Page 100 and 101: (repeat (length entl)in list:(print
Page 102 and 103: ed))(entmod ed); to layer MYLAYER.;
Page 104 and 105: The following table identifies the
Page 106 and 107: When defining dotted pairs, as in t
Page 108 and 109: Entity Data Functions and the Graph
Page 110 and 111: Non-Graphic Object HandlingAutoCAD
Page 112 and 113: Dictionary ObjectsThe following rul
Page 114 and 115: Integer 1070. A 16-bit integer (sig
Page 116 and 117: ))"\nCan't register XDATA for " app
Page 118 and 119: (setq exdata; Sets the variable'((-
Page 120 and 121: )(10 1.0 2.0 0.0) (40 . 3.14159) (5
Page 122 and 123: (10 9.0 2.0 0.0)(-2 . )As with tbln
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Page 126 and 127: Functions are grouped by data type
Page 128 and 129: Application-handling functionsFunct
Page 130 and 131: Arithmetic functionsFunctionDescrip
Page 134 and 135: Function-handling functionsFunction
Page 136 and 137: List manipulation functionsFunction
Page 138 and 139: String-handling functionsFunctionDe
Page 140 and 141: Symbol-handling functionsFunctionDe
Page 142 and 143: Display Control FunctionsThe follow
Page 144 and 145: File-handling functionsFunctionDesc
Page 146 and 147: Query and command functionsFunction
Page 148 and 149: User input functionsFunctionDescrip
Page 150 and 151: Object-handling functionsFunctionDe
Page 152 and 153: Symbol Table and Dictionary-Handlin
Page 154 and 155: variables in the associated documen
Page 156 and 157: Error CodesThe following table show
Page 158 and 159: Online program error codesValueMean
Page 160 and 161: Online program error codesValueMean
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Page 164 and 165: edefining AutoCAD commands 32,34rel
Page 166 and 167: polylines (old-style andlightweight
Page 168 and 169: string conversions 61, 64synopsis o
Page 170 and 171: overview 9file extensionsstripping
Page 172 and 173: output functions 16, 21control char
Page 174 and 175: object-handling 86, 106selection se
Page 176 and 177: quoted stringscontrol characters in
Page 178: user comments 69User Coordinate Sys
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