Class: ZeroDivide

• Inheritance
• Description
• Class protocol
  • accessing
  • instance creation
• Instance protocol
  • accessing
• Examples

Inheritance:

   Object
   |
   +--GenericException
      |
      +--Exception
         |
         +--Error
            |
            +--ProceedableError
               |
               +--ExecutionError
                  |
                  +--ArithmeticError
                     |
                     +--DomainError
                        |
                        +--ZeroDivide

Package:

stx:libbasic

Category:

Kernel-Exceptions-Errors

Version:

rev: 1.16 date: 2021/11/21 15:59:36

user: cg

file: ZeroDivide.st directory: libbasic

module: stx stc-classLibrary: libbasic

Description:

Raised when a division by zero is attempted.

To get the (in our oppinion: invalid) behavior of some programming languages such as JavaSript,
which do not report division by zero exceptions,
use the following code:

    ZeroDivide ignoreIn:[ x / 0.0 ] 

i.e.    
    ZeroDivide ignoreIn:[ 1.0 / 0.0 ] 
returns +Inf,   
and
    ZeroDivide ignoreIn:[ -1.0 / 0.0 ] 
returns -Inf instead.    

copyright
COPYRIGHT (c) 2001 by eXept Software AG
             All Rights Reserved

This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice.   This software may not
be provided or otherwise made available to, or used by, any
other person.  No title to or ownership of the software is
hereby transferred.

Class protocol:

 defaultNotifierString

 dividend: aNumber

[
(ZeroDivide dividend:10) raise
] on:ZeroDivide do:[:ex |
self assert:ex dividend == 10
].

[
10 / 0
] on:ZeroDivide do:[:ex |
self assert:ex dividend == 10
].

Instance protocol:

 defaultResumeValue

return +/- infinity here, if ever proceeded

 dividend

Return the number that was being divided by zero.

Usage example(s):

|a b| a := 5. b := 0. Integer divisionByZeroSignal handle:[:ex | Transcript showCR:('division by zero - dividend was: ' , ex dividend printString) ] do:[ a // b ]

Examples:

    |divisor|

    divisor := 0.
    Transcript showCR: ( 5 / divisor ).

    |divisor|

    divisor := 0.
    [
        Transcript showCR: ( 5 / divisor ).
    ] on:ZeroDivide do:[
        Transcript flash.
    ]

    |divisor|

    divisor := 0.
    Transcript showCR: (ZeroDivide ignoreIn:[ 5 / divisor ])

    |divisor|

    divisor := 0.
    Transcript showCR: (ZeroDivide ignoreIn:[ -5 / divisor ])

    |divisor|

    divisor := 0.
    Transcript showCR: (ZeroDivide ignoreIn:[ 0 / divisor ])